Hello everyone.

I could use a little help with a 12v oscillator, if that is the correct term.
I think a 555 chip will work, but I don't understand how cycles correspond to seconds.

Quite simply, what I am attempting to get is when 12v is applied via a switch, the timer will send out 12v for about 250 microseconds, then send no voltage out for 500 microseconds.

I think a 555 calculator can accomplish this, but I don't really know how to use that.

This is something that can be done quite cheaply I think, isn't it?

Thanks for the help,

Chopperdog

 

Yes it can.

Do you want the 250uS (high) and 500uS (low) to cycle continuously until the 12v is removed from the trigger?

 

Retched,
Thanks for the reply.
Yes, I want it to cycle continuously until the 12v power is removed.
The 12v power will be applied with a momentary switch.

Thanks,

Chopperdog

 

How precise do you need the timing to be?

A 555 timer is not very precise. If you need better than around 3% precision, you'll need to go to a crystal oscillator.

 

I would like pretty accurate timing, but it is not precision.
Do you +/- 3% ? It that is the case, then the 555 would be fine.
If you mean that a 555 timer is way off, then I shoud consider the crystal oscillator.