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| Electrical Wiring Question (Update: IT WORKS!!!!!) |
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| stan2323:
--- Quote from: Jdurg on March 23, 2008, 06:00:31 pm ---(While I wait to build the cabinet, the coin-door has become an awesome piggy bank because any time I get a quarter in change it ends up going in through my coin door. I must have forty of fifty dollars in quarters in there now.) :cheers: --- End quote --- Do not finish your cab too soon you may make your money back. :laugh2: :laugh2: :laugh2: |
| loadman:
-- Removed as I did not read the question properly -- :banghead: |
| Ginsu Victim:
Jdurg: Just making sure you understand that I meant there's no reason for ME to have one. If you get yours working proper, that's awesome, I just don't need it. |
| DaOld Man:
I really dont think I would attach the ground of the power supply to the ground of the keyboard encoder. Your drawing with the two diodes would probably work, as long as the power supply's ground is the same as the keyboard encoder's ground. But even then you are sending the high current of the counter through the keyboard encoder. Although the way I would do it is a bit more complicated, I think it is a better way to do it. This will work if the keyboard encoder supplies a +5vdc bus (I know the keywiz encoder does.) Anyway, i would pick up a couple of very cheap opto isolators, 2 330 ohm resistors, and a diode and wire it like this. Any way you wire it, you should use a diode across the counter (D1). The counter has a relay like mechanism. This produces a very high counter EMF surge, which can destroy electronics. The diode kills this back surge. (your counter may already have one wired in.) |
| Jdurg:
Thanks. This is pretty much what I was looking for. The meter I have does have a diode built into it. I am certain of that. When looking at the voltages, I was thinking about placing a resistor in there after the diode to lower the voltage down to a level that the encoder could handle. I'm just not sure how much heat would be generated if taking it from +5V down any further, and how long that would last. However, I do notice that both the IPAC and the Keywiz keyboard incoders have USB connections, therefore they should readily be able to handle the 5V that USB provides. Therefore, the +5V coming from the coin meter should in no way cause any damage at all since the encoder itself is taking in +5V. I even see that the KeyWiz encoder has a 5V connection if needed. |
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