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Need help with T2 solenoid driver circuit!

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1UP:

--- Quote ---While I have done some extensive (if simplistic) electronics in the past, and understand what you want to do, wouldn't it just be a lot more simple to have the relay fire when the trigger is depressed and not worry about the ipac led's at all?
--- End quote ---

Elkor:
Well then.

:-X   <- put in place.

I guess that answers that!

(for the record, I did not now that the guns slowed down and was working on the assumtion of a constant rate of fire.  That's what I get for guessing)

The good news is:  your circuit looks like it will work just fine, I would drive the DC circuit instead of the AC one for exactly the reasons listed, hook the DC leads up just like you have in reply #12. Not quite sure what voltage andy is driving the led on the ipac  with but 5V seems reasonable and it is easy enough to check, just use a multimeter on the lead before the series resistor (or ask him).  Your ipac shoud be fine.  The diode won't hurt, you just don't need it w/a solid state relay.

And, yes, solenoids do wear out. (i.e. pinball flippers)

Bill Lash:
I just started looking at this thread, and I think you guys are putting your back EMF diodes in the wrong place.  I have always seen them in parallel with the coil.  

When you turn off the transistor, the current will continue to flow through the coil, building up voltage.  If you put
a diode across the coil, that is reverse biased when you turn on the transistor (so no current flows through it), when you turn off the transistor, the current will flow through the diode until it dies out.

You may want to look at http://www.jaycar.com.au/PDFS/relaydrv.pdf

Beley:

--- Quote ---Dammit, I went out and got a 1uF cap when I already had a 1000uF!
--- End quote ---

Elkor:

--- Quote ---I just started looking at this thread, and I think you guys are putting your back EMF diodes in the wrong place.
--- End quote ---

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