urgent coinmech question

dogcow

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hi,

i have a game that has an electronic comparitor mech in it right now
im trying to convert it to use a more reliable mech that just has a simple
switch.

the one thing im not sure how the wires connect to the switch. in the old mech
a harness plugs in, the connectors are labeled

counter +/-
dc +12v
coin signal
ground
counter -/+

my gut tells me the 12v line goes on one side of the switch and the "coin signal"
line goes on the other but im not sure. can anyone confirm this?
 
In a conventional game, it's ground and coin signal. The inputs on a game board are active low. No 12v. That would probably blow the input on the board.

-Ian
 
wow thanks that would have been bad, ill give it a try
 
In a conventional game, it's ground and coin signal. The inputs on a game board are active low. No 12v. That would probably blow the input on the board.

-Ian

so i can be clear what is actually happening...the coin line is a circuit
and when the coin falls through the "pulse" is the circuit being broken?
 
so i can be clear what is actually happening...the coin line is a circuit
and when the coin falls through the "pulse" is the circuit being broken?

No. The coin switch is normally open, just like all the other switches in the game (joystick, buttons, etc). When the coin hits it, it closes the circuit, bringing it to ground. That registers a credit. Inputs on game boards are active low - that is, they're tied high through pullup resistors on the board, then brought low through the switches when they are closed.

-Ian
 
so i can be clear what is actually happening...the coin line is a circuit
and when the coin falls through the "pulse" is the circuit being broken?

I think it's the other way around. The circuit is 'normally open' and the act of dropping a coin through the switch closes the circuit momentarily, causing a ground signal to be sent up the coin input line.
 
No. The coin switch is normally open, just like all the other switches in the game (joystick, buttons, etc). When the coin hits it, it closes the circuit, bringing it to ground. That registers a credit. Inputs on game boards are active low - that is, they're tied high through pullup resistors on the board, then brought low through the switches when they are closed.

-Ian

lol thats a little over my head but i think i get the gist, thx

also got it working with the other coin mech appreciate all the help guys
 
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