Categories: Car Circuits

Car Transistor Ignition

This transistor ignition circuit give your car to have better starting and smoother running, particularly at very high and very low RPM. Lower fuel consumption, less pollution, lower servicing costs. Drive economically, drive electronically. Only for petrol/gasoline engines. This circuit will reduce breaker point wear and provide cleaner spark.

Circuit diagram:

Wiring diagram with the vehicles:

Circuit Notes:
This circuit used for cars with negative ground 12V negative ground system, maximum ignition current of 4A and maximum switching speed 500KHz. Motorcycles, mowers, boats, etc can also use this circuit.

For 6V Negative ground system, change the following resistors:

  • R1, R2: 150 ohm / 1W
  • R3 : 68 ohm / 1/4W
  • R4 : 100 ohm / 1/4W
  • R5, R6, R7: 68 ohm / 1W

Car Transistor Ignition Specifications :

  • Completely shockproof
  • Practically test on 2-4-6-8 cylinder engines during a total amount of 2.500.000 km.
  • Principle: transistorized ignition
  • Connection element: Darlington transistor, triple diffused
  • Connection current: 4 A
  • Connection speed : Up to 500 KHz
  • Typical firing period : 2.000 u second

The kit of electronic transistor ignition is available at electronic online store. Download the manual transistor ignition kit manual from the following link:

circuit diagram

View Comments

  • As with the above inquiry; can this be modified to work on a positive ground
    twin motorcycle, and would I have to parallel the coil primaries, and have the wasted
    spark on the non compression cylinder.

Recent Posts

Guitar Synthesizer Schematic Diagram Collection

Guitar Synthesizer Schematic Diagram In this post, we provide a collection of schematic diagrams of…

54 years ago

Handy Talky HT DIY Schematic Diagram

Handy Talky Schematic Diagram This is an old electronic scheme of the Handy Talky (HT)…

54 years ago

Doorbell Ringer Birdie Tone

This is an old or "very old" schematic diagram of birdie tone or sound generator.…

54 years ago

200W MOSFET Amplifier based IRFP250N

Here is the 200W MOSFET amplifier powered based on four piece of IRFP250N, they are…

54 years ago

300W RMS Stereo Power Amplifier based IC TDA7294

This is the 300W RMS stereo power amplifier circuit project. This amplifier is based four…

54 years ago

Stereo Tone Control with Line In + Microphone Mixer

This is an active stereo tone control circuit using very well known op-amp IC of…

54 years ago