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Single Slot Coin Door dilemna

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codemonkey76:

--- Quote from: Slippyblade on December 03, 2013, 02:09:17 am ---You would need to be using a 4 player encoder or have your keyboard/gamepad hack ready.  These diagrams assume a common ground.  With this setup if you dropped a coin without having a button down NOTHING will happen.

--- End quote ---

I have an i-pac4


--- Quote from: PL1 on December 03, 2013, 03:33:07 am ---The way the original post was phrased, it didn't sound like he was planning on having four coin buttons on the CP.   :dunno

If there are buttons for Coin 1 thru Coin 4 on the CP why the  :censored:  would someone bother with a circuit like this instead of just wiring Coin 1-4 to the associated encoder inputs and wire the coin slot in parallel with the (most often used) Coin 1 button?   :dizzy:

Another option that makes sense is to wire Coin 1 thru Coin 4 buttons to the encoder and wire the coin switch to all 4 encoder inputs using one diode per input (band toward the coin switch) so one coin drop gives you Coin 1 + Coin 2 + Coin 3 + Coin 4.  YMMV.


Scott

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correct, i am not having any coin buttons on the CP, i was planning on just pressing (and holding) button 1 for each respective player when inserting a coin, not player x start button, can I do the proposed method using button 1, rather than player X start?

can I have it so that just inserting a coin without pressing a button would result in a credit for player 1?

Binkles:
The way I would do it is buy one of those dial type switches, wire the wire that would normally go back to the 1 credit spot on the ipac to the middle pin of the dial, then wire the four positions on the dial to credits 1 to 4 on the ipac.

Leave the switch in position 1 for normal credit, twist the dial to positions 2 to 4 depending on which player enters the coin otherwise.

PL1:

--- Quote from: codemonkey76 on December 03, 2013, 07:30:04 am ---i am not having any coin buttons on the CP, i was planning on just pressing (and holding) button 1 for each respective player when inserting a coin, not player x start button, can I do the proposed method using button 1, rather than player X start?

can I have it so that just inserting a coin without pressing a button would result in a credit for player 1?

--- End quote ---

The one downside to the Button 1 approach is that some games use B1 as the start button.

Check the control panels for the games on your play list -- no dedicated start button usually means B1 doubles as Start.   :dunno

If you're going to the time, effort, and expense of making a 4-player panel and don't intend to include  coin buttons on the CP, I recommend getting a 4-slot coin door (Divemaster127 has them at arcadeemulator.net) or making the equivalent using CDRs from GGG or rectangular buttons from Divemaster with inserts that you print yourself.


Scott

BadMouth:
Why not just map the controls in MAME to require one of the start buttons to be held down when a coin is inserted.
Map P1 coin to: P1 start button+coin switch
Map P2 coin to: P2 start button+coin switch
etc.

Only issue is that if they don't hold down a start button, then don't get a credit.
Not a big deal since this isn't for commercial use.

Personally I'd just have the coin door for looks and add a coin button next to the start button.

JDFan:
OR just drill a hole in the door to mount a 4 way selector switch (like Pictured below) and wire it so that it credits the selected player number when a coin is inserted.

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