Description:FIELD OF THE INVENTION
[1] Embodiments of a present disclosure relates to a compact portable shaker device for an efficient mixing and shaking of sample, and more particularly toa shaker device having compact design, portability, and precise timer functionality which make it suitable for use in laboratories, agricultural fields, farms, and other environments where sample preparation and analysis are performed.

BACKGROUNDOF THE INVENTION
[2] Currently, there are a plenty of commercially available devices for mixing, blending or agitating contents in a test tube such as vortex shaker, reciprocating shaker, orbital shaker, wrist action etc. The vortex type shaker is not suitable for high volume of samples. The orbital type shaker is used for gentle mixing or aeration of the contents and therefore not suitable for vigorous mixing. Reciprocating shakers can be noisy during operation and may not be compatible for the test tubes required in soil testing procedure.
[3] The shakers that are commercially available have complex mechanism and large number of components which leads to more maintenance and are more prone to wear and tear. Also, an important factor to consider is portability. As these devices are bulky and heavy, they cannot be carried everywhere such as in the fields or multiple locations around a testing site. Moreover, these devices run only from AC power supply which makes them unusable in remote locations with no power. Some shakers have a mechanical time-keeping mechanism which is highly inaccurate and contains more moving parts thus decreasing reliability in the long run.
[4] In scientific research and laboratory settings, the accurate and efficient mixing of samples is essential for various applications, including biological assays, chemical reactions, and pharmaceutical development. Traditional shaker devices have been used for decades to facilitate sample mixing by applying mechanical agitation to test tubes or containers. However, these devices often suffer from limitations such as large size, heavy weight, limited portability, and noise generation which have limited their effectiveness and hindered the efficiency of sample preparation processes.
[5] US7422362B2 relates to a portable blender system and method involving a mixing base that is capable of agitating the contents of a container. The base includes a structure for rotating a shaft, a recessed well positioned at a top of the mixing base, a pressure-actuated switch positioned about the periphery of the recessed well, a locking groove, and a portable power source.
[6] IN201921034200 relates to an agitator device and a method to achieve mixing of dissimilar materials. The agitator device rotates inside mixing vessel. The agitator device comprising plurality of conical configuration comprising plurality of baffles rows. The flow of mixing material past baffles generates compressive force and successive elongation to achieve mixing of dissimilar materials.
[7] One significant limitation of conventional shaker devices is their large size and heavy weight. These devices occupy a significant amount of space on laboratory benches, restricting the available workspace for researchers. Their bulkiness also hampers their portability, making it challenging to transport them for fieldwork or on-site experiments.
[8] Another drawback of prior art shakers is their reliance on constant power sources. Many traditional shaker devices require a continuous supply of electricity to function, which limits their usability in environments where power outlets may not be readily available or accessible. This constraint restricts the flexibility and mobility of researchers, particularly in remote locations or during fieldwork.
[9] Noise generation is another issue encountered with prior art shakers. Traditional devices often produce significant noise during operation, which can be distracting and disruptive in laboratory settings. Excessive noise levels can impede researchers' concentration and affect the accuracy of experimental results, requiring additional measures to minimize disturbances.
[10] Additionally, some earlier shaker devices lack precise timing mechanisms. The absence of reliable timers or the reliance on manual monitoring can lead to variations in shaking duration, resulting in inconsistent and less reproducible results. This limitation increases the risk of human error and necessitates constant attention from researchers during the shaking process.
[11] Furthermore, certain conventional shakers may not effectively prevent sample sedimentation. Inadequate mixing mechanisms and rotational motions can lead to uneven sample distribution and settling, compromising the quality and accuracy of experimental outcomes. Ensuring a consistent and vigorous mixing motion is crucial for obtaining reliable and reproducible results.
[12] Given these drawbacks in existing shaker devices, there is a need for an improved solution that addresses these limitations and provides a more efficient, portable, and user-friendly option for sample mixing and shaking tasks.
[13] Therefore, there is a need for to overcome these challenges and introduce a compact, portable shaker device that offers improved performance, reduced noise, precise timing, and effective sample mixing motion, thereby enhancing the efficiency and reliability of sample preparation processes.

OBJECTS OF THE INVENTION
[14] Some of the objects of the present disclosure, which at least one embodiment herein satisfies are as listed herein below.
[15] The main object of the present invention is to provide acompact portable shaker device for an efficient mixing and shaking of samplethat can be easily transported and used in various settings, including laboratories, agricultural fields, and research facilities.
[16] Another object of the present invention is to provide a compact portable shaker devicecomprising a housing, a motor, a centrifuge tube holder, a motor driver, a main controller unit, a display unit, a power switch, a motor power switch, an alarm, and a rechargeable power supply unit.
[17] Yet another object of the present invention is to provide a compact portable shaker device to include safety features such as a spill pause function and a drain hole which provide convenience and prevent any potential accidents or mess during operation, a reliable power source eliminating the need for constant electrical connections.
[18] Yet another object of the present invention is to provide a method for operating a compact portable shaker device for efficient mixing and shaking of samples.
[19] Still another object of the present invention is to provide adurable and long-lasting shaker device utilizing robust materials and suitable manufacturing methods to ensure longevity and minimize maintenance requirementsto offer a cost-effective solution compared to larger and more complex shaker devices, making it accessible to a wider range of users in various fields of study and application.

SUMMARY OF THE INVENTION
[20] This summary is provided to introduce a selection of concepts, in a simple manner, which is further described in the detailed description of the disclosure. This summary is neither intended to identify key or essential inventive concepts of the subject matter nor to determine the scope of the disclosure.
[21] Embodiments of the present invention relates to a compact portable shaker device for an efficient mixing and shaking of sample. The compact design, portability, and precise timer functionality make it suitable for use in laboratories, agricultural fields, farms, and other environments where sample preparation and analysis are performed. The device addresses the need for a smaller, lightweight, and quieter alternative to existing shakers in the market, providing improved convenience, performance, and accuracy in sample processing.
[22] In an embodiment of the present invention, a compact portable shaker device comprising a housing with predefined dimensions of height, width, and depth, a motor securely mounted on a plate using predefined screws configured to prevent contact with the housing during operation, a centrifuge tube holder configured to accommodate multiple test tubes with secure fitting, a motor driver configured to provide constant rotation speed for efficient sample mixing, a main controller unit configured to control operation of the compact shaker device, a display unit configured to display a predefined shaking time, a power switch configured to allow a user-controlled motor operation, a motor power switch configured for pausing a shaking process, a time selector switch configured to allow the user-controlled selection of shaking duration, an alarm configured to produce an audible notification upon shaking completion, and a rechargeable power supply unit configured for providing support up to 5 hours of continuous operation. The housing is configured to accommodate test tubes in a vertical orientation to provide effective shaking motion to provide mitigating sample sedimentation.
[23] The compact portable shaker device of the present invention provides advantages in terms of portability, efficient mixing, accurate timing, spill protection, safety, durability, quiet operation, cost-effectiveness, and suitability for agricultural applications. These benefits make it a valuable tool for researchers, scientists, and agriculturists seeking reliable and convenient sample preparation and shaking processes.
[24] Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures.

BRIEF DESCRIPTION OF THE DRAWINGS
[25] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[26] FIG. 1 depicts a general assembly drawing disclosing basic overall dimension of a front view, a side view, a back view, a top orthographic view in first angle projection of a compact portable shaker device of the present invention for an efficient mixing and shaking of sample;
[27] FIG. 2depicts an external isometric view of the compact portable shaker device of the present invention for an efficient mixing and shaking of sample;
[28] FIG. 3depicts an internal isometric view of the compact portable shaker device of the present invention for an efficient mixing and shaking of sample;
[29] FIG. 4 depicts a schematic diagram of the compact portable shaker device of the present invention for an efficient mixing and shaking of sampleshowing logical electrical connections between components;
[30] FIG. 5 depicts a centrifuge tube holder of the compact portable shaker device of the present invention.
[31] FIG. 6 depicts a C Clamp for tubes of a centrifuge tube holder of the compact portable shaker device of the present invention;
[32] FIG. 7depicts a simplified block diagram of the compact portable shaker device of the present invention;
[33] FIG. 8 depicts a flowchart of working of a compact portable shaker device of the present invention for an efficient mixing and shaking of sample;
[34] FIG. 9 depicts a motor mount and placement of the motor mount in the compact portable shaker device of the present invention; and
[35] FIG. 10 depicts a coupling used in the compact portable shaker device of the present invention.

DETAILED DESCRIPTION OF THE INVENTION
[36] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure as defined by the appended claims.
[37] In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present invention. It will be apparent to one skilled in the art that embodiments of the present invention may be practiced without some of these specific details.
[38] Embodiments of the present invention relates to a compact portable shaker devicefor an efficient mixing and shaking of sample. The compact design, portability, and precise timer functionality make it suitable for use in laboratories, agricultural fields, farms, and other environments where sample preparation and analysis are performed. The device addresses the need for a smaller, lightweight, and quieter alternative to existing shakers in the market, providing improved convenience, performance, and accuracy in sample processing.
[39] FIG. 1 depicts a general assembly drawing disclosing basic overall dimension of a front view, a side view, a back view, a top orthographic view in first angle projectionof a compact portable shaker device of the present invention for an efficient mixing and shaking of sample.
[40] FIG. 2 depicts an external isometric view of the compact portable shaker device of the present invention for an efficient mixing and shaking of sample.
[41] FIG. 3 depicts an internal isometric view of the compact portable shaker device of the present invention for an efficient mixing and shaking of sample.
[42] In an embodiment of the present invention, a compact portable shaker device comprising a housing (1) with predefined dimensions of height, width, and depth, a motor securely mounted on a plate using predefined screws (10) configured to prevent contact with the housing during operation, a centrifuge tube holder configured to accommodate multiple test tubes with secure fitting, a motor driver (11) configured to provide constant rotation speed for efficient sample mixing, a main controller unit configured to control operation of the compact shaker device, a display unit (4) configured to display a predefined shaking time, a power switch (8) configured to allow a user-controlled motor operation, a motor power switch (6) configured for pausing a shaking process, a time selector switch (5) configured to allow the user-controlled selection of shaking duration, an alarm configured to produce an audible notification upon shaking completion, and a rechargeable power supply unit (12) configured for providing support up to 5 hours of continuous operation. The housing is configured to accommodate test tubes in a vertical orientation to provide effective shaking motion to provide mitigating sample sedimentation.
[43] FIG. 4 depicts a schematic diagram of the compact portable shaker device of the present invention for an efficient mixing and shaking of sample showing logical electrical connections between components.In FIG. 4, U1 is the Arduino nano. MP1584_RECEP is the DC-DC adjustable buck module.
[44] FIG. 5 depicts a centrifuge tube holder of the compact portable shaker device of the present invention.
[45] FIG. 6 depicts a C Clamp for tubes of a centrifuge tube holder of a compact portable shaker device of the present invention.
[46] The predefined dimensions of the housing are 192 mm height, 190 mm width, and 92 mm depth. The motor is secured with 4 M3 screws (10). The motor driver is a direct current (DC) worm gear motor (11) providing a constant rotation speed of 125 rpm. The main controller unit is an Arduino Nano. The predefined shaking time options available to the user are one of 2, 5, 10, and 15 minutes. The centrifuge tube holder comprises a C Clamp (13) mechanism, securely holding the test tubes to prevent sample spillage.
[47] The compact shaker device further comprises a provision for pausing a shaking process with the time selector switch and the motor resuming from the last recorded time when restarted. The device features a vent (9) at the rear of the housing preventing motor overheating during operation. The motor driver integrates a metal-oxide-semiconductor field-effect transistor (MOSFET) configured for protection against current spikes or surges. The compact shaker device further comprises a charging port (7) for the power supply unit configured for enabling efficient recharging for continuous use. The housing comprises a door (3) to be closed during operation ensuring operational safety for minimizing process interference.
[48] The compact shaker device further comprises a DC-DC adjustable buck module for powering the Arduino Nano configured to provide stable and adjustable power supply to the main controller unit. The housing (1) materials are lightweight yet durable enhancing the portability and lifespan of the device. The compact shaker device further comprises a vibration isolation mechanism (2) that reduces noise to improve users’ comfort during operation.
[49] FIG. 7depicts a simplified block diagram of the compact portable shaker device of the present invention.
[50] FIG. 8 depicts a flowchart of working of a compact portable shaker device of the present invention for an efficient mixing and shaking of sample.
[51] In another embodiment of the present invention, a method for operating a compact portable shaker device for efficient mixing and shaking of samples, comprising the steps of powering on the compact portable shaker device to turn on the display unit (4).The time selector switch (5) is toggled to cycle through preset time values of 2, 5, 10, and 15 minutes. A desired preset timevalue is selectedby stopping at the desired preset time on the display.The motor power switch (6) is turned on to start the shaking process which initiates the countdown of the desired preset time. The test tubes are rotated at a constant speed of 125 rpm to achieve vigorous mixing of the sample contents. The countdown is monitored on the display unit (4) as a timer reduces remaining time in seconds and minutes. Automatically turning off the motor followed by activating a buzzer for 1 second when the desired preset time has elapsed. The shaking process is paused in case of spillage by turning off the motor power switch (6)followed by utilizing a drain hole provided in the compact portable shaker device (100).The shaking process is resumed by turning on the motor power switch (6) after addressing any spillage.The motor power switch (6)is optionally turned off during operation before the completion of the desired preset time wherein stopping the motor followed by pausing timer on the display unit (4).The motor power switch (6) is turned on again to resume the shaking process from the previous timer value.The time selector switch (5) is toggled during the shaking process which results in a short beep from the buzzer for 200 milliseconds without altering remaining time on the display unit (4). The main power switch (8) is turned off to switch off the compact portable shaker device (100) during an ongoing shaking process followed by resetting the time selector switch (5) to 00:00 upon powering on the compact portable shaker device (100) again.
[52] The invention is further ascribed below by reference of the following, non-limiting examples:
[53] Design and Features
The shaker is compact with 192mm height, 190mm width and 111.5mm depth which is much smaller than other shakers in the market. The test tubes are rotated vertically such as to provide an effective shaking motion that prevents the sample from sedimentation. The device is portable as it is battery powered providing 3 hours of usage in one charge. The device addresses some key shortcomings from the previously mentioned devices by being small, compact, lightweight, and quieter. In an experiment, the extraction process for two similar samples were run for the same time in an orbital shaker and this device. After testing, it was found that this device produced similar results when compared to the orbital shaker. The tubes are rotated at a constant 125 rpm which allows vigorous mixing of its contents.In a case of spill, there is a provision to pause the shaking. A drain hole is provided for that purpose.There are 4 timing options available- 2, 5, 10, and 15 mins. The same can be selected using a trigger switch provided.The design features a door which can be closed while operating the device. The design features a vent at the back of the device to prevent overheating of the motor during the operation.
[54] FIG. 9 depicts a motor mount and placement of the motor mount in the compact portable shaker device of the present invention.
[55] Motor mount and Placement
The motor is mounted to a plate with 4 M4 screws.The tube plate is attached to the motor shaft using a coupling.The whole setup is mounted in the center of the device such that the plate does not touch the sides of the device during the operation.
[56] Centrifuge tube holder
The provision for at least 3 centrifuge tubes is provided. Anything beyond 3 tubes will increase the size of the system. The present design is suitable to test in 3 configurations including 1, 2, and 3 centrifuge tubes.
C Clamp for tubes
The C Clamp for tubes is depicted in the FIG. 5 with the defined dimensions.The C Clamp for tubes provides a tight fit for the test tube. The layers of the 3D printed part are such that it prevents it from breaking when tubes are attached from the top
[57] Electrical components
Arduino Nano
Arduino Nano is used as the main controller unit of the deviceas it is very small in size and have enough GPIO pins which fulfils the need.
DC Motor
Full load on with centrifuge tube of 2 Kg-cm. The motor Specification includes current of 1 A, voltage of 12 V DC,D-shaft gear ratio of 42:1, operating voltage of 12V DC, rated current of 1.1A, rated RPM240, RPM under load125, and a rated torque of 4kg-cm.
Motor Driver for DC worm gear
A simple MOSFET is used to drive the DC gear motor. The MOSFET is reliable and durable to drive DC Gear motor.The spike current or surge current protector has been used in the driver circuit.
7 segments4-digit timer
The TM1637 4 digits 7 Segment LEDdisplay module with clock is an affordable solution for displaying the time of the shaker device. The 7 segment LED Display has 4 digits which are controlled by TM1637 Driver Chip. It requires only two connections to control the TM1637 4 Digits 7 Segment LEDdisplay module.
Motor power switch
The motor power switch used is a SPST ON/OFF microswitch which is rated as 2A, 250VAC. The operating temperature is around -25 to 85 °C.
Time selector switch
The 2 PIN momentary self-reset round switch is provided which aids in electrical conductivity.
Buzzer
A 5V active Electromagnetic Buzzer is used to add beep sound in the shaker device when the shaking process is finished. The buzzer operates on 5V supply. The buzzer uses a coil element to generate an audible tone.
Main Supply power switch
A 12V ring light self-lock non-momentary metal push-button switch is usedas it is a metal switch and it is a heavy-duty switch. The stainless-steel material is used for long-term use. A high-end appearance and good to touch.Inbuilt colourfulring illumination LED is provided, shows good electrical conductivity, and has integral supply resistors.
DC-DC Adjustable Buck Module
A DC-DC buck adjustable buck module is used for powering the Arduino Nano.The Mini MP1584 DC-DC 3A adjustable buck module is ultra small adjustable DC to DC step-down buck converter which uses an MP1584EN high frequency switching regulator and integrated high voltage power MOSFET.It features soft start, thermal shutdown, and under-voltage lockout (UVLO) to protect the module from operating at the insufficient supply voltage. The input voltage is 4.5V – 28V. The output voltage is 0.8V – 20V. The output voltage adjustment is on-board potentiometer. The output current is 1.8A (typical), and 3.0A (max).
Battery
A 12-volt 2600 mAh Li-ion battery is used for powering up the shaker device as it has a very good backup.This battery is compact in size and its weight is very less.Li-ion batteries has up to 10X longer cycle life than lead-acid equivalent.2.5X more efficient operation at low temperatures. Safely operational up to 149°F (65°C).Full power available throughout discharge. Voltage does not drop like lead-acid.Low self-discharge so the battery maintains state of charge.
Charging Port for battery
A female DC power Jack adaptor is used for charging the shaker device battery.The internal diameter of the plug is 2.1mm, and the external diameter of the plug is 5.5mm.
[58] FIG. 10 depicts a coupling used in the compact portable shaker device of the present invention.
[59] Mechanical components
Fasteners
Part Name Quantity Supplier
M3 x 25mm bolt 6 Robu.in (SKU: 69639)

M5 x 12mm bolt 8 Robu.in (SKU: 342925)

M4 x 16mm bolt 6 Robu.in (SKU: 342909)

Coupling
The coupling is selected such that it fits the D-shaft of the motor as depicted in FIG. 9.The coupling is made up of steel which increases durability.The weight of the coupling acts as a counterweight if there is an imbalance in the setup.
[60] Therefore, the present invention provides a compact portable shaker device for efficient mixing and shaking of samples. The compact and portable design allows for easy transportation and use in various settings, including field research and remote locations. The device is powered by a rechargeable battery, it eliminates the need for a continuous power supply, providing flexibility in its usage.The device ensures efficient mixing by rotating test tubes at a speed of 125 rpm, preventing sedimentation and promoting sample homogeneity. The device provides an accurate digital timer with a 4-digit seven-segment display enables precise timing, ensuring consistency and repeatability in experiments.With multiple timing options of 2, 5, 10, and 15 minutes, the shaker accommodates various sample preparation needs, providing versatility in operation. It also features spill protection, allowing users to pause the shaking process and a drain hole to minimize sample loss and protect against accidental spills.Safety is prioritized through a stable motor mount and placement, preventing the plate from touching the device's sides during operation. The inclusion of a vent at the back prevents motor overheating, ensuring extended and reliable use.
[61] Additionally, the shaker is designed to operate quietly, minimizing noise disruptions during experiments. Its durable construction and choice of materials contribute to its longevity, making it suitable for long-term use in scientific and agricultural applications.Cost-effectiveness is achieved through the use of economical components, making the device an affordable solution compared to more complex alternatives. The compact portable shaker deviceof the present invention is suitable for agricultural applications, enabling soil nutrient testing, seed germination studies, and another related research.
[62] Therefore, the compact portable shaker device of the present invention offers advantages in terms of portability, efficient mixing, accurate timing, spill protection, safety, durability, quiet operation, cost-effectiveness, and suitability for agricultural applications. These benefits make it a valuable tool for researchers, scientists, and agriculturists seeking reliable and convenient sample preparation and shaking processes.
[63] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.
, Claims:WE CLAIM:
1. A compact portable shaker device (100) comprising:
a housing (1) with predefined dimensions of height, width, and depth,
wherein the housing is configured to accommodate test tubes in a vertical orientation to provide effective shaking motion to provide mitigating sample sedimentation;
a motor securely mounted on a plate using predefined screws (10) configured to prevent contact with the housing during operation;
a centrifuge tube holder configured to accommodate multiple test tubes with secure fitting;
a motor driver (11) configured to provide constant rotation speed for efficient sample mixing;
a main controller unit configured to control operation of the compact shaker device;
a display unit (4) configured to display a predefined shaking time;
a main power switch (8) configured to allow a user-controlled motor operation;
a motor power switch (6) configured for pausing a shaking process;
a time selector switch (5) configured to allow the user-controlled selection of shaking duration; and
an alarm configured to produce an audible notification upon shaking completion; and
a rechargeable power supply unit (12) configured for providing support up to 5 hours of continuous operation.
2. The compact shaker device (100)as claimed in claim 1, wherein the predefined dimensions of the housing are 192 mm height, 190 mm width, and 92 mm depth.
3. The compact shaker device (100)as claimed in claim 1, wherein the motor is secured with 4 M3 screws (10).
4. The compact shaker device (100)as claimed in claim 1, wherein the motor driver is a direct current (DC) worm gear motor (11) providing a constant rotation speed of 125 rpm.
5. The compact shaker device(100)as claimed in claim 1, wherein the main controller unit is an Arduino Nano.
6. The compact shaker device (100)as claimed in claim 1, wherein the predefined shaking time options available to the user are one of 2, 5, 10, and 15 minutes.
7. The compact shaker device (100)as claimed in claim 1, wherein the centrifuge tube holder comprises a C Clamp (13) mechanism securely holding the test tubes to prevent sample spillage.
8. The compact shaker device (100)as claimed in claim 1, wherein the compact shaker device further comprises a provision for pausing a shaking process with the time selector switch and the motor resuming from the last recorded time when restarted.
9. The compact shaker device (100)as claimed in claim 1, wherein the device features a vent (9) at the rear of the housing preventing motor overheating during operation.
10. The compact shaker device (100)as claimed in claim 1, wherein the motor driver integrates a metal-oxide-semiconductor field-effect transistor (MOSFET) configured for protection against current spikes or surges.
11. The compact shaker device (100)as claimed in claim 1, the compact shaker device further comprises a charging port (7) for the power supply unit configured for enabling efficient recharging for continuous use.
12. The compact shaker device (100)as claimed in claim 1, wherein the housing comprises a door (3) to be closed during operation ensuring operational safety for minimizing process interference.
13. The compact shaker device (100)as claimed in claim 1, the compact shaker device further comprises a DC-DC adjustable buck module for powering the Arduino Nano configured to provide stable and adjustable power supply to the main controller unit.
14. The compact shaker device (100)as claimed in claim 1, wherein the housing (1) materials are lightweight yet durable enhancing the portability and lifespan of the device.
15. The compact shaker device (100)as claimed in claim 1, wherein the compact shaker device further comprises a vibration isolation mechanism (2) that reduces noise to improve users’ comfort during operation.
16. A method for operating a compact portable shaker device (100)for efficient mixing and shaking of samples, comprising the steps of:
powering on the compact portable shaker device to turn on the display unit (4),
wherein the display unit (4) comprises a four-digit seven segment display to display time as 00:00;
toggling the time selector switch (5) to cycle through preset time values of 2, 5, 10, and 15 minutes;
selecting a desired preset time value by stopping at the desired preset time on the display;
turning on the motor power switch (6) starts the shaking process which initiates the countdown of the desired preset time;
rotating test tubes at a constant speed of 125 rpm to achieve vigorous mixing of the sample contents;
monitoring countdown on the display unit (4) as a timer reduces remaining time in seconds and minutes;
automatically turning off the motor followed by activating a buzzer for 1 second when the desired preset time has elapsed;
pausing shaking process in case of spillage by turning off the motor power switch (6)followed by utilizing a drain hole provided in the compact portable shaker device (100);
resuming the shaking process by turning on the motor power switch (6) after addressing any spillage;
optionally turning off the motor power switch (6) during operation before the completion of the desired preset time,
wherein stopping the motor followed by pausing timer on the display unit (4);
turning on the motor power switch (6) again to resume the shaking process from the previous timer value;
toggling the time selector switch (5) during the shaking process which results in a short beep from the buzzer for 200 milliseconds without altering remaining time on the display unit (4); and
turning off the main power switch (8) to switch off the compact portable shaker device (100) during an ongoing shaking process followed by resetting the time selector switch (5) to 00:00 upon powering on the compact portable shaker device (100).