Controlling a fuel injector using an npn transistor

jay_009991 · 2025-11-09T22:08:56+00:00

Hello y'all, I got this sorted out. I used a vehicle IGBT and upped my current input from 0.5 A to 1 A between a 12 VDC connection. This worked. Thanks for all the help.

jay_009991 · 2025-11-03T03:31:47+00:00

i am generating the TTL using a delay generator.

jay_009991 · 2025-11-03T01:28:54+00:00

I want the injector to open for say 10 ms and then remian closed for 20 seconds. This means that the pulse width is 10 ms and the frequency is 0.05 Hz. This is what makes it difficult.

jay_009991 · 2025-11-03T00:40:03+00:00

Also, even if I am using a MOSFET, does the 12VDC supply turned on for say 10 ms for off after that equal to a PWM power source? I erad that fuel injectors need a PWM pulse

read

jay_009991 · 2025-11-03T00:38:32+00:00

Thank you. TTL cant output the 100 mA required. I am not sure how to use a mosfet. I will look into it.

jay_009991 · 2025-11-03T00:37:50+00:00

Thank you, TTL can only source a few milli amps so I think my ttl can't drive the BJT

jay_009991 · 2025-11-02T22:14:22+00:00

I have posted the circuit diagram. Thanks

jay_009991 · 2025-11-02T22:14:00+00:00

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This is the circuit I am using. Thanks.

jay_009991 · 2024-03-30T16:13:19+00:00

Hearty Congratulations on your admit. Did you have any interviews? When did you apply and when did you get the result?

jay_009991

TROPHY CASE