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Relay question (adding relay to Oscars LED driver board) - it works!
SirPoonga:
--- Quote from: RandyT on June 15, 2005, 11:05:42 am ---BTW, SirP, will gravity be used to reset the rod or is there a spring loaded return?
--- End quote ---
See the pic in my qbert thread
http://forum.arcadecontrols.com/index.php/topic,37834.0.html
I can get all the text off the knocker. I don't think anything about specs was on it.
I will have to ask OscarControls and 1UP where they got it from.
Long story about the knocker. I think it started in the hands of Kelsey (OscarControls) when I was first talking about this a couple years ago. I said I'd do the software side (urebelscum was going to include it into analog+ mame) if he did the hardware. Well, busy guy he is he handed it off to 1UP. 1UP, I suspect, was busy planning his cabinet venture. So he now sent the knocker ot me.
If I remember that's how the story goes, but it has been going VERY slow over the last couple of years :)
Hey Randy, not to get off topic, but have you looked at the dartboard thing some more?
SirPoonga:
Doing a quick search all the pinball supply places carry it, but don;t list specs :(
All I could find is
http://members.shaw.ca/cfpinball/gottliebcoil.html
JoyMonkey:
I just tried out the circuit and I've got a problem (hopefully nothing major).
Right now I've got it wired just like the cut-n-pasted diagram above; I hooked up a 150 ohm resistor and a random LED to point B - and they work fine when I hit Scroll Lock, but the relay isn't giving me 12v like I expected. I checked all my connections and everything appears fine.
Could I have picked the wrong resistor? Should I try a higher or lower value resistor?
I was delighted when the LED lit up, but now I'm stumped. :'(
RandyT:
--- Quote from: JoyMonkey on June 15, 2005, 10:08:06 pm ---I just tried out the circuit and I've got a problem (hopefully nothing major).
Right now I've got it wired just like the cut-n-pasted diagram above; I hooked up a 150 ohm resistor and a random LED to point B - and they work fine when I hit Scroll Lock, but the relay isn't giving me 12v like I expected. I checked all my connections and everything appears fine.
Could I have picked the wrong resistor? Should I try a higher or lower value resistor?
I was delighted when the LED lit up, but now I'm stumped. :'(
--- End quote ---
First thing, disconnect the 12v lines from the relay. Energize the circuit and check for continuity through the switching part of the relay (where the 12v lines were) No continuity means the relay isn't working.
Popcorrin says you shouldn't need a resistor in there (except for the LED) so I would try taking the LED and the resistor out of the circuit and take pin B straight to ground. There might be a voltage drop or something that the relay doesn't like.
Something to try, anyway.
RandyT
JoyMonkey:
--- Quote from: RandyT on June 15, 2005, 10:19:13 pm ---First thing, disconnect the 12v lines from the relay. Energize the circuit and check for continuity through the switching part of the relay (where the 12v lines were) No continuity means the relay isn't working.
Popcorrin says you shouldn't need a resistor in there (except for the LED) so I would try taking the LED and the resistor out of the circuit and take pin B straight to ground. There might be a voltage drop or something that the relay doesn't like.
Something to try, anyway.
RandyT
--- End quote ---
Okay...
There's no continuity in the relay's switch. I removed the LED and resistor and I've still go the same result.
Could it be the transistor I'm using? I just used what I had at hand (a PNP to 92 transistor 2N3906) which is different to the one's that Oscar uses in the LED driver circuit, but he does say that any general purpose PNP transistor should do.
What happens if I take the 1k resistor out of the equation?
Edit: Just for clarity, here's what I've got right now
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