Adjustable 12v Flashing

[ThirtyTwo]

hello again

i need to set up a fuel injector controller that sends 12v to the injector at an adjustable rate from around 70 times a second to 130 times a second. i was thinking about something similar to a strobe light setup with a trimmer or regular potentiometer to adjust the rate. but i think injectors pull around 4 amps which to my knowledge is a lot for a small components circuit

Any ideas?

 

[zachtheterrible]

strobe circuit with a high power transistor :lol:

Maybe a 555 to set the cycles per second?

 

[Roff]

hello again

i need to set up a fuel injector controller that sends 12v to the injector at an adjustable rate from around 70 times a second to 130 times a second. i was thinking about something similar to a strobe light setup with a trimmer or regular potentiometer to adjust the rate. but i think injectors pull around 4 amps which to my knowledge is a lot for a small components circuit

Any ideas?

What about the duty cycle? Are you wantig fixed pulse width, adjustable frequency?

 

[ThirtyTwo]

yeah an adjustable pulse width sounds like it would perform better, but it sounds like it would be a lot more complicated, could it still be done using a 555 with an adjustable pulse width and rate?

 

[Roff]

yeah an adjustable pulse width sounds like it would perform better, but it sounds like it would be a lot more complicated, could it still be done using a 555 with an adjustable pulse width and rate?

If you want independent control of width and frequency, you would need two 555s (or a 556). One would set the frequency, the other the pulse width.

 

[ThirtyTwo]

do you guys know any articles or anything to learn how to use a 555???

 

[Styx]

**broken link removed**

 

[ThirtyTwo]

yeah that stuff is really confusing

i know how to code a little C++, do you think i could learn how to program a pic and have it do this?