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| CH-926 and I-PAC 4 |
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| the_gamer:
--- Quote from: AndyWarne on August 23, 2012, 04:30:29 am ---It would be best to also connect the ground from the disk connector. --- End quote --- OK, so connect both ground of the ipac and the disk connector to the ground of the coin acceptor. --- Quote from: AndyWarne on August 23, 2012, 04:30:29 am ---The zener is connected as shown to prevent the voltage on the coin output wire from rising above 5 volts. --- End quote --- Are you really sure about that one? My point is that the Voltage coming out would not change, look here: http://en.wikipedia.org/wiki/Series_and_parallel_circuits#Voltage Sure I don't need to wire it in series so that it can change the voltage? I'm a little confused about that point. But if all people here say to wire it parallel, i will wire it parallel because it works for all of you and so it will have to work for me, too. |
| dgame:
Yes, all of the grounds get connected together. As for the diode, connect it parallel like in Andy's diagram above: --- Quote ---Zener diodes are widely used as voltage references and as shunt regulators to regulate the voltage across small circuits. When connected in parallel with a variable voltage source so that it is reverse biased, a zener diode conducts when the voltage reaches the diode's reverse breakdown voltage. From that point on, the relatively low impedance of the diode keeps the voltage across the diode at that value. --- End quote --- http://en.wikipedia.org/wiki/Zener_diode |
| AndyWarne:
Just to expand on this, of course if you were to connect a 5 volt zener diode in this way across a 12 volt battery to try to lower the voltage it would burn out. But it works in this application because the coin mech has a high resistance pull-up to 12 volts internally. Its not hard-driven to 12 volts. So the zener is not doing much work to pull the voltage down to 5. |
| the_gamer:
Thanks a lot! Now the only problem is the connect them the right way around. Bought some z-diods on ebay. Will ask the manufacturer/google for the manual to find that out, I guess this will work. |
| PL1:
--- Quote from: the_gamer on August 24, 2012, 02:53:00 am ---Thanks a lot! Now the only problem is the connect them the right way around. Bought some z-diods on ebay. Will ask the manufacturer/google for the manual to find that out, I guess this will work. --- End quote --- Look for the line on the diode. Easy way to remember which way it goes is that the line on the diode goes with the line in the schematic symbol. Since zener diodes are reverse biased, connect the cathode to pin 2 (coin signal) and the anode to pin 3 (ground). Scott |
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