Yet another Coinslot plea

[Jukecade]

Hi
I know this has probably been asked before but am struggling to find the answer i can understand.

I want to wire a Coin slot like the china ones you see on e-bay etc which has a 9/12v pulse to a hacked joypad ("select button') so when a coin is inserted the pulse is like pressing the select on the joypad. I know i have to do something with a relay but I believe the ampage coming from the coinslot is not enough to trigger a standard relay. I guess you can use a ?transisters but I cant understand how a a transister with 3 legs can trigger a separate  lower powered circuit. I think a transister needs 5+volts where I guess a joypad uses 1-3.5volts.

Please help

Thanks you

[PL1]

First question: Is your gamepad an active-low or active-high device?

Most encoders are active-low (connect ground to the input to trigger the output), but the ZD encoders are active-high.  (connect 5v to the input to trigger the output)

Measure the voltage on a daisy-chained trace (common to more than one button) -- ground = active-low, 5v = active-high

If your gamepad is an active-high device, check out this thread.

If your gamepad is an active-low device, wire it up like this with 12v to the recognizer and coin signal/ground connected to your gamepad.



The reverse-biased zener diode is there to regulate the 12v from the coin recognizer down to 5v -- use a zener diode rated for the voltage that your gamepad uses.

You may need to adjust the sensitivity or program the recognizer depending on the model you are using.   


Scott

[Jukecade]

Thank you for this reply. I'll see what the voltage is and see if I can work it out. I'm pretty scared of blowing up my pc trying to figure this out.

[paigeoliver]

Hi
I know this has probably been asked before but am struggling to find the answer i can understand.

I want to wire a Coin slot like the china ones you see on e-bay etc which has a 9/12v pulse to a hacked joypad ("select button') so when a coin is inserted the pulse is like pressing the select on the joypad. I know i have to do something with a relay but I believe the ampage coming from the coinslot is not enough to trigger a standard relay. I guess you can use a ?transisters but I cant understand how a a transister with 3 legs can trigger a separate  lower powered circuit. I think a transister needs 5+volts where I guess a joypad uses 1-3.5volts.

Please help

Thanks you

Why not just use a mechanical one like this instead. No hook up worries at all.

http://www.ebay.com/itm/Coin-door-single-slot-for-Arcade-Jamma-Game-coin-selector-acceptor-validator-/251537685821

[oldschoolgamer21]

Did you get this going jukecade.. If not I can help you wire up a transistor with a relay.. very simple to do..

[Jukecade]

Did you get this going jukecade.. If not I can help you wire up a transistor with a relay.. very simple to do..

sorry its taken so long to reply but I've ben busy with other things and this arcade plan had to take a back burner. I would be overjoyed if you can help give me a simple wiring diagam to get this working. I have tried the so called local 'eletronics experts' here but as soon as I tell them I DONT want the coinslot attached to a timer board they simply dont understand what i mean . Also does not help when I'm not a local here and tryig to get myself understood is very tricky! I tried the jukeblaster idea of using the coin counter wires to trigger a 12v relay but there does not seem to be enough voltage to trip it. so that failed.

Please help. I would be so grateful

[PL1]

I would be overjoyed if you can help give me a simple wiring diagam to get this working. I have tried the so called local 'eletronics experts' here but as soon as I tell them I DONT want the coinslot attached to a timer board they simply dont understand what i mean . Also does not help when I'm not a local here and tryig to get myself understood is very tricky! I tried the jukeblaster idea of using the coin counter wires to trigger a 12v relay but there does not seem to be enough voltage to trip it. so that failed.

If you're using a 12v coin recognizer to drive a 12v relay, you don't want the 5v Zener diode in the diagram above.

Wire it like this with an optional 12v snubber diode (there might be one built into your relay -- you'll need an external one if you have relay "chatter") and the "ZD encoder" wires connected to the gamepad.



If you're not familiar with relays, here is a tutorial.   


Scott

[Jukecade]

ok

wiring the relay directly to the coin signal and ground seems to work but now I have another issue.
The coin slot thing only sends a 160ms pulse but the program i am using  with it only polls the joypad (which the coinslot replay is attached to closing the "select" button") every 500ms. I need some sort of circuit that will hold the pulse for about half to a full second.

any ideas anyone?

thank you

[BobA]

Monostable or "One Shot" or Pulse Extender Circuit

http://www.555-timer-circuits.com/monostable-555.html

Since the output goes high when triggered you will need an inverter on the output to get the opposite effect.
An inverter is typically a single gate the produces a NOT signal.  Should work at 5V logic levels.