Tighe
Well-known member
I know that this has been discussed before, but I had a slightly different approach here.
Here is one switch of many that have 8 decks each with one pole per deck. 12 Positions total on the switch.
http://www.digikey.com/product-detail/en/71B30-08A12N/71B30-08A12N-ND/1643896
I was thinking that really there are only 8 wires that need to be switched on a JAMMA harness, all the rest can be handled with diodes:
Ground can be connected all the time and the rest can be done with diodes:
I think that the rating should be high enough to handle the current used by a JAMMA board:
Contact Rating @ Voltage 0.25A @ 28VDC which if I am correct in my thinking would be 0.5A at 12VDC and approx 1A at 5V.
If it isn't there are other switches with higher ratings.
http://www.digikey.com/product-search/en/switches/rotary/1114210?k=rotary switch
http://www.nkkswitches.com/series.aspx?stid=6&id=5057
http://www.nkkswitches.com/pdf/hs_ps_ts.pdf
It sure would be cool to select games like a TV back in the day.
Here is one switch of many that have 8 decks each with one pole per deck. 12 Positions total on the switch.
http://www.digikey.com/product-detail/en/71B30-08A12N/71B30-08A12N-ND/1643896
I was thinking that really there are only 8 wires that need to be switched on a JAMMA harness, all the rest can be handled with diodes:
- +12VDC
- +5VDC
- -5VDC
- VIDEO BLUE
- VIDEO GREEN
- VIDEO GROUND
- VIDEO RED
- VIDEO SYNC
Ground can be connected all the time and the rest can be done with diodes:
- COIN COUNTER #1
- COIN COUNTER #2
- COIN SWITCH #1
- COIN SWITCH #2
- LOCK OUT COIL #1
- LOCK OUT COIL #2
- PLAYER 1 - BUTTON 1
- PLAYER 1 - BUTTON 2
- PLAYER 1 - BUTTON 3
- PLAYER 1 - DOWN
- PLAYER 1 - LEFT
- PLAYER 1 - RIGHT
- PLAYER 1 - START
- PLAYER 1 - UP
- PLAYER 2 - BUTTON 1
- PLAYER 2 - BUTTON 2
- PLAYER 2 - BUTTON 3
- PLAYER 2 - DOWN
- PLAYER 2 - LEFT
- PLAYER 2 - RIGHT
- PLAYER 2 - START
- PLAYER 2 - UP
- SERVICE SWITCH
- SPEAKER (-)
- SPEAKER (+)
- TEST SWITCH
- TILT (SLAM) SWITCH
I think that the rating should be high enough to handle the current used by a JAMMA board:
Contact Rating @ Voltage 0.25A @ 28VDC which if I am correct in my thinking would be 0.5A at 12VDC and approx 1A at 5V.
If it isn't there are other switches with higher ratings.
http://www.digikey.com/product-search/en/switches/rotary/1114210?k=rotary switch
http://www.nkkswitches.com/series.aspx?stid=6&id=5057
http://www.nkkswitches.com/pdf/hs_ps_ts.pdf
It sure would be cool to select games like a TV back in the day.
