FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
Complete specification [See section 10 and rule 13]

1. Title of the invention
" Natural burner based gas fired boiler/water heater temperature controller "
2. Applicant (s)
1 Applicant Anion Technology Research Organization
Address 101/102-Silver Coin Complex, Opp. Crystal Mall, Kalawad Road, Rajkot 360005 (Gujarat), INDIA
2 Inventor Marolia Varunkumar Vasantbhai
Nationality An Indian
Address "Sudarshan Clinic" Vijalpore, Dandi Road, Navsari-396450 (Gujarat), India.
The following specification particularly describes the invention and the manner in which it is to be performed.

Field of Invention:
The present invention generally relates to a combustion system and temperature process control of a natural or auxiliary ' burner based gas/oil type storage water . heater/boiler added with certain safety measures for safer and easy operation of the heater/boiler. While. the present invention is especially designed for gas/oil based water storage heaters/boilers the same
system can also be used in Gas based ovens/stoves,
Industrial boilers/heaters or any other flammable fuel
based heating device with, perhaps a need of temperature
process control.
Background of Invention:
Gas and oil burner based all types of heaters uses a controller to safely initiate, monitor/ control and shut down combustions. Simple systems-such as those use mechanical controllers and thermostats to implement these functions. While these systems can provide many of the functionalities they lack robustness, easy
installation, low maintenance and most of all a need of human machine interaction.
Early gas/oil based fire places required ' manual lighting of the boiler/heater each time the user wanted
operation, but more recent systems have standing pilot. flame, so that the user can turn ON the system by simply turning on the gas valve. In order to do this. the user must be at the fireplace to turn the valve ON, Many of the existing systems implement electronic ignition with some sort of flame sensing technique. Such systems are well described in EP0320082A1, EP0071174B1 and EP0884535A2. This type of system does . not require the presence of a pilot flame and hence saving more fuel and giving the user flexibility for-remote operation. But in order to operate the system the user must provide a constant source of electricity.
Above mentioned systems only provides a means of
driving the combustion process for a gas/oil based
burner system. To control the temperature of the
material being heat treated a separate controller is

needed which could drive this ignition system and provide the heat treatment to the material stored in the heater/boiler as per the user's need with keeping the safety issues in mind. The existing systems for controlling temperature with user interfaces only provide control systems such are described in patent US4568821 and US5103078. While these' systems are well implemented they lack a compatible combustion system and consume electricity. Moreover patent US6261087. shows a way to generate the required electricity from a thermopile using a pilot flame to run the controller system, but it lacks good user interface and requires manual operation from the user side in a case of pilot flame failure. Not to mention the added continuous waste of fuel for the required pilot flame over the' time.
To deal with the issue of constant electricity, required for the temperature controllers and to deal with the compatible combustion system with these temperature controllers, there raises a need for unique system which should be portable, battery backed up, works on low power, easy to install, user interactive and encapsulates an interactive combustion module to follow better safety standards with minimum fuel . and or
electricity waste.
Brief description of the drawings and tables:
Figure 1, 2 and 3 are the general schematic of the motherboard module responsible for safe user interactive temperature process control to a preferred embodiment of this invention.
Figure 4 and 5 are the general schematic of the daughterboard module responsible for performing safe combustion of the end system to a preferred embodiment of this invention.
Figure 6 and 8 are the methods embedded -in the .
motherboard module for performing process control and
safe ignition of the end system respectively.

Figure 7 is a method embedded in the daughterboard module of sequence control ' for achieving safe combustion of the end system.
Table 1 and 2 shows the values and details of the components used to build the preferred embodiment of this' invention for motherboard and daughterboard module respectively.
Objects and summary of the invention:
The main object of invention is to develop a microprocessor/microcontroller based temperature controller that generally relates to a combustion system and temperature process control of a natural or auxiliary burner based gas/oil type storage water heater/boiler.
Another object of invention is that the main board controller implements a flexible process management algorithm' which makes it possible to change different parameters of the system on the fly.
Another object of invention is that the control algorithm implements different sets of safety standards algorithms to avoid accidents or any damages to the' boiler while saving fuel consumptions.
Yet another object of invention is that the overall system can work on either wall adapter or a 6V solar cell as an external power source or using inbuilt Li- Ion battery. This feature is useful in the area where there is a scarcity of electricity.
Yet another object of invention is that the main controller implements a temperature controlled linear battery charging system with dedicated charge controller'which helps ameliorate the battery life.
Yet another object of invention is that the sensor. module in the main controller implements two separate thermistor based temperature sensors where one of them

act as a master/primary and the another one as a slave/secondary. The operation of the boiler can be configured using either or both of the sensors. This feature helps with temperature stacking problem by' limiting the maximum boiler temperature and avoiding accidence.
Yet another object of invention is that the main controller implements an error/exception management system, which handles different sets of 'error for providing system safety. These exceptions are displayed on the LCD .to assist the user in solving the issue.
Yet another object of invention is that different set
of timers helps automate the boiler according to the
user need. These timers are governed by an inbuilt RTC
(real time clock) structure.
Yet another object of invention is that when not in use the main controller implements different sleep modes to preserve power while keeping the RTC running in the background for maintaining the time and the timers.
Yet another object of invention is that the main/master controller' and the daughter/slave controller are connected using a single bus cable which- provides path for communication and power- for daughter board. This . bus cable can be extended for a long distance which gives the user benefit of placing the main controller to a remote location.
Yet another object of invention is that the low voltage "area and ' the high voltage area for flame sensing and ignition process are electrically isolated. This helps protect the low voltage electrical components and avoid" leak of high voltage on user end. This electrical isolation also prevents high voltage signals to enter the main power grid and hence preventing other electrical, equipment from the side effects like electrical noise or radio frequencies.

Yet another object of invention is that to prevent electrical disturbances in the flame sensing circuit that could be generated due to high voltage electrical fields produced by the ignition spark by using a shielded high voltage silicon rubber cable.
Yet- another object of invention is that the daughter board implements a new flame sensing technique, which uses self-generated high voltage DC to sense the flame on regular intervals. The hardware and the software both together help avoid false flame detection to prevent accidents.
Method and apparatus for controlling Ignition process & temperature of gas based oven/boilers/geysers.
Detail description of the overall apparatus
Overall apparatus is designed into two different modules with their respective functionalities." The presented apparatus can be encompassed into single or more than one module depending upon the end application. The first module is the motherboard module which is responsible for HMI (Human Machine Interface i.e. LCD, .Keypad, Buzzer and Indication LEDs), Battery charging with smart power selection, Temperature sensing and controlling, Error/exception management,. system time and timers management and additional system parameters management. The second module is the daughterboard module which is responsible for automating the combustion process {i.e. Solenoid valve drive, Ignition, flame sensing, feedback to . motherboard) of the gas based burner system. Both of the modules are embedded with individual microcontrollers/processors of their own and are connected with each other using a single bus cable. Both of the modules are further more divided into different blocks according to their respective functionalities. Figure . 1, 2 and 3 show the schematic of the motherboard module .

while figure 4 and 5 shows the schematic of the.
daughter board module. Table 1 shows the actual values of the components for the motherboard while Table 2 shows the values of the components for daughterboard module. The patent will first describe the motherboard
module schematic and its functionalities followed by the daughterboard schematic and its functionalities.
Figure 1 shows the power supply design of the main controller.U3 in Block 1 is a 5 Volt fixed low voltage dropout voltage regulator connected via reverse polarity protection diode Dl. Capacitor CI and C12 are the DC filtering capacitors to sustain regulated voltage at required current.. The output voltage of the. . Block 1 directly goes to the Block 2 of the power supply design. U2 in Block 2 is a linear Li-Ion battery charger circuit with internal temperature control. A slide switch is connected to connect and disconnect the
.battery from the device. C3, C7 and C2 are filtering-capacitors. R14 sets the value for charging current for the battery while R15 sets the total system current which is battery current* end system current. The RED LED turns ON when a valid power source is. detected and the Yellow LED turns ON while the battery is in charging mode. Rl and R2 are the current limiting resistors. R4 and R16 create a voltage divider network to support the 10 K NTC input -to regulate the charging current according to the battery temperature. U2 works
.as an inverter. If external power source is available the battery . will go to charging if not it will automatically switches to. the battery. The output from
"U2 goes to Block 3 - Ul and to daughterboard module through FRC_10PIN P$land P$2. Ul is a high frequency switched capacitor DC/DC voltage convertor. It converts the unregulated battery voltage which varies from 3.5 to 4.2 to a 5V fixed voltage. C4 and C6 are the DC line filtering capacitors for input and output respectively.

C1O is a charge pump capacitor used by Ul for providing maximum of 140 mA current at 5 volts to the- microcontroller the display and the sensor circuit of the motherboard module.
Figure 2 discloses the schematic for motherboard module which encapsulates interfaces to the 16X2 alphanumeric LCD display, a 4 push to ON keypad, a terminal for' NTC sensor interface and a dual purpose 10 pin FRC interface for ISP programming and communication with the daughterboard module. IC1 is a microcontroller of the motherboard module which handles the 'system time, timers, control system, exception management, safety protocols, HMI interface and communication with the daughter board module for handling the ignition-
. process. R12 is a pull up resistor applied on ' the RESET pin with noise filtering capacitor C13. XTAL is a RTC watch crystal for running system time. C14 and C15 are the loading capacitance for balancing the XTAL
frequency-. C8 and C9 are the filtering capacitor' applied closed to the supply and ground pins of the microcontroller. Ql and Q2 are NPN transistor used as a' digital switch to deliver high current for buzzer and backlight of the LCD display respectively. D2 is a fly-back diode for protection of the Ql due to the back EMF generated by the coil of the buzzer. Q3 is a PNP transistor acting as a power switch to the LCD module. When entering sleep mode Q3 will be activated to turn OFF the power to the display to preserve the battery power. TRIMMER is used to control the contrast, of the display. Cll -is a noise filtering capacitor for the NTC sensor input. R9 is high accuracy voltage divider resistor whose value is dependent upon the value of the NTC- thermistor at TO (normally 25 degree C). RIO is the current limiting resistor for the GREEN LED. The GREEN LED will' turn ON when the system has completed the ignition process successfully and that the burner is

ON. Rll is. a current limiting resistor coupled with C16 which act as a de-bouncing capacitor to avoid multiple interrupts generated while pressing a key. R13 is pull-. . down resistor which is connected to the RESET pin of the daughterboard module via FRC_1OPIN connector. This will insure that the daughterboard microcontroller stays in OFF state when it should be.
Figure 3 discloses the keypad interface schematic. The- circuit is designed to generate an interrupt when any of the four key is pressed. Once the interrupt has been generated IC1 will figure out which key(s) has been pressed. SI, S2, S3 and S4 are the push to ON tact keys. One terminal of every pin is shorted together to form a single interrupt line while the other terminals are directly connected to the I/O pins of the IC1 of, . motherboard module through a connector.
Figure 4 and Figure 5 discloses the schematic' of the daughterboard module which handles the ignition process. The daughterboard module is divided into two parts digital and High-voltage. Figure 4 discloses the schematic of the digital part for the daughterboard module. The daughter board module receives the power supply from the motherboard power supply module through the FRC_10PIN connector. FRC_10PIN connector is a dual purpose interface for ISP (In System Programming) of the daughterboard microcontroller and- for the communication to the motherboard module. Since the two. modules are connected via single cable a filtering capacitor is necessary to reduce generated noise in the power supply lines over the distance. Capacitor C2 is that filtering capacitor. C1 is a glitch filter placed . as closed to the microcontroller as possible. C3 is a noise filtering capacitor for the RESET pin of the microcontroller unit. C5 is the noise filtering capacitor attached to the ADC (analogue to digital convertor) pin of the microcontroller to filter out

flame sensing signal generated from flame sensing block. Ql is an NPN high collector current BJT transistor used to drive current from supply to the ground through the primary windings of a high frequency audio transformer Tl. Ql is- driven at high audio frequency (32 KHz} with over 90% duty cycle to generate an EMF in the secondary windings. This EMF in the secondary winding is generated due to the back EMF produced in the primary windings. The induced voltage in the secondary winding of the Tl is rectified through D6 and filtered through high voltage low ESR capacitor MPC1. The Valve Block is designed to drive a 3V solenoid valve with PULL and HOLD function/coils. To turn- ON the valve IC1 changes the level of PBO to high which in turn passes through D5 and C4 to Q2 which in turn enables the Q2. Q2 will stay in ON state until the C4 capacitor is fully charged {i.e. > 63 %) . Once the. C'4 is charged (around half a second) Q2 enters cut OFF region. RIO is the load resistor for discharging the capacitor when IC1 changes the level of PBO to low. Q3 remains ON as long as logic level of PBO of IC1 remains .high. Diode Dl and D2 are fly-back diodes for. protecting Q2 and Q3 from back EMF generated by the solenoid valve coils.
Figure 5 discloses the schematic of High Voltage block of the daughterboard module. The Spark Block is responsible for burning/igniting the fuel/gas while the Flame Sensing Block is responsible for detecting the flame. The- rectified and filtered DC voltage at the ' MPC1 is applied to both the ' ignition block and the flame sensing block. The induced EMF into the secondary
'of Tl generates current which passes through D7 to MPC2 to Wl_l to ground. This current will charge the MPC2
.capacitor, for pre-calculated amount of time controlled . via IC1 of daughterboard module. The same current will also.induce EMF into secondary winding of the. T2 while

charging . the capacitor MPC2. IC2 is an optoisolator which is used to drive SCR Q4. IC2 separates the high voltage side form the digital side. When MPC2 is fully charged the FIRE signal from the ICl will activate the internal TRIAC of IC2. A small amount of current will flow through D7 to R7 to the GATE terminal of the SCR Q4. This small current triggers the Q4. Once the Q4 is
in ON state the charge from MPC2 will start to flow through the primary windings of the T2. This will induce EMF into the secondary windings of the transformer T2 while discharging the capacitor MPC2. Both the charge and discharge cycles of the MPC2 induces enough EMF into the secondary windings of T2 to create 5 mm of air spark. The Flame Sensing Block uses IC3, an optocoupler with photodarlington output, high CTR (current transfer ratio) (> 500%) and high voltage isolation. The rectified and filtered output DC voltage induced at MPC1 is applied to R2. R2 is a current. limiting resistor for protecting the internal diode of IC3. The output from terminal 2 of the IC3 is extended
through a high voltage shielded mashed cable to a flame sensing electrode. The shielding of this cable is
connected, to the high voltage ground and the body of . the burner or the boiler. In the event when the flame is ON with flame sensing electrode in it, the current will pass through the flame to the body of the burner/boiler and will return through the shielding mash of the high voltage cable. This will saturate the photodarligton pair of the IC3 for given CTR times. This saturation will result in flow of current through R5 to the digital ground which in turn will, give a voltage change across R5. Here R5 is the load resistance. This change of voltage is fed to the ADC of ICl of the daughterboard module through the FS terminal and processed further to detect the flame.

Figure 6 discloses the software flow process of the. motherboard module for controlling the temperature of the system. The control process encapsulates a ∆t/∆T safety timer. The function of the timer is to ensure system's effectiveness by frequently checking for the temperature difference with respect to time when the heating is' ON. Here At is the maximum amount of time- required for the system to change its temperature by single degree. This time varies from system to system and hence needs to be programmed by.the manufacturer of the heating system.
Figure 7 discloses the software flow process of the daughterboard module for flame sensing, solenoid valve driving and ignition of the end system. It tries to ignite the end system for preset amount of time loaded into ignition timer. The sensing of flame' and igniting the end system are two different processes executed sequentially. The ignition process takes fixed amount of time loaded into ignition burst timer. Once that timer is timed out it checks for a flame. This will keep on going until the ignition timer times out or a flame has been detected. As a measure of safety, on successful ignition the system will keep checking for presence of the flame every half a second.
' Figure 8 discloses the software flow process of the. safety protocols followed by the motherboard module before and during the execution of the ignition process by the daughterboard module. Furthermore the system implements- its own clock structure with capability of running multiple user programmable timers with their individual set points in any mode of operation. The system implements an interrupt based key driven none preemptive process scheduling algorithm with real time control which enables the user to change the system's parameters at any time.

Part Name Value/Details
BAT Li-Ion battery connector
Buzzer 5 Volt Throuqh hole buzzer
01,05,012 10 μF
C2,C4,C7 4.7 μF
C3 1 μF
C6,C10 2.2 μF
08,09,011 0.1 μF
C13/C16 0.01 μF
C14,C15 12 pF
D1,D2 1N4007
LCD 16X2 JHDA Alpha Numeric Display
NTC1/NTC2 10 K @ 25 'C R5%/B1%
Q1,Q2 BC817 NPN BJT transistor
Q3 BC807 PNP BJT transistor
R1,R2,R10 IK
R4 6.8K
R5 56E
R6/R7,R8. 3.3K
R9,R12,R13 10K
Rll 560
R14,R15 1.5K
R16 16K
TRIMMER 5K
XTAL 32.768KHZ RTC crystal
U1 TPS60150 DRV 6, DC/DC charge pump
U2 BQ24072T, Li-Ion battery charger
U3 LM1117, 5 Volt Voltaae reaulator
IC1 ATMega328 , AVR 8-bit microcontroller
Table 1

Part
Name Value/Details
CI, C7 0.1 μF
C2,C4 100 μF
C5 1 μF
C3 0.01 μF
C6 10 μF
MPC1 0.1 uF ,250 Volts Thin Film Metallic polyester
MPC2 0.47 uF, 250 Volts Thin Film Metallic
01,02,03, D4,D6,D7 1N4007
D5 1N4148
Q1,Q2,Q3 BC33725, NPN BJT transistor
Q4 . MCR100 8, SCR
Rl,R3,R6, R8 1K
R2 3.3K
R4.,R10 10K
R5 15K
R7 1M
IC1 ATtinyl3A, AVR 8-bit microcontroller
IC2 MOC3021 Optoisola tor TRIAC/SCR driver
IC3 4N33, Optocoupler with dariinqton hiqh qain
Tl Hiqh Frequency audio transformer
T2 Ignition Transformer
Table 2
Claims:
l.A combustion system with temperature process control of a natural or auxiliary burner based gas/oil type storage tank, heater/boiler comprising:
a) at least one temperature sensor installed into
the said storage tank means for measuring the
temperature of the material being heated,
b) a motherboard module means for managing power
source to the overall system with internal
battery management, keystroke detection and
processing, measuring and displaying real time
temperature, controlling the temperature of the
said system using advance control method, real
time clock, one or more user and or system
programmable timers, an error management system
means to record plurality of errors of the said
system and communication with daughterboard
module with advance safety methods for

combustion and temperature control of the said end system; and c) a . daughterboard module means for managing at least one solenoid valve, a flame, sensor with ' advance flame sensing circuit and method, a -high voltage 9KV-24KV spark based ignition system with sequence control and a communication with motherboard module for combustion of the burner of.the said system.
2. A combustion system with temperature process. control according to claim 1 wherein said motherboard module comprising an advance method of hysteresis based ON/OFF process control system shown in figure 6 encapsulates a At/AT safety timer serving dual purpose of which to ensure system's effectiveness by measuring the temperature difference at programmed interval in which the said . end system must have temperature change' of positive degree' to carry forward the heating process and-thus offering effective fire safety in the event of false flame detection and or providing the end user or manufacturer of the said system means for indication of further. needed improvement or required service for better performance by comprising following steps;
check to see if current temperature (CV) is more than or equals to user programmed temperature (SV), if so, turn OFF the said heating process by means of said communication to \the daughter board module, else;
check to see if said CV is less than the SV, if so, check to see if the said heating process is in OFF state, if so,' turn ON the said heating process by means of said communication to the daughterboard module, check to see if an error has occurred while trying to turn ON the said heating process by means of said error management system, if so, process. the said error by displaying it on the LCD display and exit, else record the said CV as RCV and set the said At/AT

timer for said user programmed time interval, else;
check to see if the said At/AT timer has timed out, if so, check to see if said CV is more than the ' said recorder system temperature (RCV), . if so, update the said RCV with said. CV and reload the said At/AT timer to said user programmed. interval and exit, else;
turn OFF the said process by means of said communication to the daughterboard module, set error - no temperature change by means of said error management system, process the said error by displaying the said error on the said LCD display and exit.
3. A combustion system with temperature process control according to claim 1 and 2 wherein said motherboard module comprising an advance method of initiating the heating process shown in figure 8 encapsulates a safety ignition timer the purpose of which to stop the said combustion process after user programmed interval, and a means of checking the presence of the said temperature sensor said daughterboard module and said keystroke comprises of following steps:
check to see if the said temperature sensor is connected to the said motherboard module by means of reading the analogue to digital converter pin 7 (ADC7) as shown in figure 2 of the microcontroller (IC1) means for detecting the presence of the said temperature sensor, if not so, set error - temperature sensor open by means of said error management system, process the said error by displaying the said error on the said ' LCD display and exit, else;
enable the daughterboard module by means of said communication method, check to see if the said daughterboard module is connected to the said motherboard module by means of said communication method, if not so, set error - daughterboard not connected by means of said error management

system, process the said error by displaying the said error on the said LCD display and exit, else;
setup the ignition timer using said .system timers and said user programmed time interval and signal the ' said daughterboard module for the said combustion process by means of said communication method;
loop until the said ignition timer has timed out or OFF key has been pressed by means of said keystroke detection, if so, check to see if the said OFF key has been .pressed if so, set error -ignition cancelled else set error -ignition timed out by means of said error management system, process the said error by displaying the said error on the said LCD display and exit, else-check to see if the said signalled combustion is successful by means of said communication method if not continue the said loop, else; check to see if the EEPROM data of the said microcontroller is consistence by. means of comparing the values of the said EEPROM data with the data in the RAM of the said microcontroller, if not so, set error - high- voltage disturbance by means of said error management system, process the said error by displaying, the said error on the said LCD display and exit, else exit.
4. A combustion system with temperature process control according to claim 1 wherein said daughterboard module comprising an advance method of said combustion shown in figure 7 encapsulates said safety ignition timer and a spark burst timer along with sequence of followings steps:
take a dark reading of the said flame sensor by means of reading the analogue to digital convertor pin 3 (PB3) of- the microcontroller IC1 as shown in figure 4 of the controller block of the said daughterboard module before ignition starts;
open the solenoid valve means to actuate the valve open means for releasing the fuel from the

burner and load the said ignition timer, with safety time interval;
loop until the ignition timer times out, if the said ignition timer timed out close the solenoid valve means to actuate the valve close means for stopping the fuel from the burner, signal failure to the said motherboard module, by means of said communication of the said daughterboard module else load the spark burst timer with programmed time interval and initiate the ignition means to ignite the said fuel and check if the said spark . burst timer timed out, if so, sense the flame by means of reading the said flame sensor, subtract the said flame reading from the said dark reading and identify the presence of the flame means for comparing with a flame sense threshold, if so, signal success to the said motherboard module by means of said communication of the said daughterboard module and keep checking the said flame sensor for said flame reading..
5. A combustion system with temperature process control according to claim 1 .wherein said daughterboard module comprising an advance flame. sensing circuit shown in "figure 4 and figure 5 (flame sensing block) means for sensing presence or absence of the flame using flame rectification wherein - a direct current high voltage (VDD) generated by means of continuously switching Ql ON and OFF by means of microcontroller IC1 - pin -6 (PB1) at below saturation frequency of voltage booster Tl transformer inducing high voltage VDD(70 V - 150 V) filtered by MPC1 is applied across R2, anode of the internal infrared diode of IC3 high gain (>500%) optocoupler photodarlington and open flame, where cathode of the said .infrared diode is connected to the flame rectification electrode ' by means of a shielded silicon rubber cable and the body of the burner is connected to the HVGND by' means of said shielded silicon rubber cable, an electric current pass through said R2 to internal diode of the said IC3 to the flame rectification

electrode and through the flame if present to the HVGND, making the said internal infrared diode to emit light means for transferring proportional current into the photodarlington sensor from VCC to sense resistor R5 to DGND of the said IC3 which cause change in voltage across said sense resistor R5 which is sensed by means of analogue to digital convertor pin 3 (PB4) and processed by the method, in said claim 4, of the . said microcontroller ICl while maintaining proper isolation between the high voltage block and the digital block.
6. A combustion system with temperature process control according to claim 1 wherein said daughterboard module comprising an advance transistor assisted . capacitor discharged based ignition circuit with two way electrical isolation between the digital and high voltage block as shown in figure 4 (controller block) and figure. 5 (spark block) wherein charge capacitor MPC2 is charged by means of continuously switching Ql ON and OFF by means of microcontroller IC1 - pin 6 (PB1) at below saturation frequency of voltage booster Tl transformer inducing high voltage VDD(70 V - 150 V) which produce a flow of current from diode D7 to -said MPC2 to the primary windings of the ignition coil to HVGND and thus inducing voltage into the secondary windings of the said ignition coil, to produce a spark while charging the said MPC2 capacitor, the same of which will be discharged to produce another ignition- spark with charge discharge cycle frequency in between 50 to 200Hz where the flow of current will pass from the said charged capacitor MPC2 to silicon controlled rectifier (SCR) Q4 to the primary windings of the .said ignition coil by means of driving the gate terminal of the said SCR Q4 using optoisolater IC2 using microcontroller IC1 pin-2' (PB3) means for driving the optoisolator IC2 while ' maintaining proper' electrical isolation between the high. voltage block and the digital block.