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Parallel Port Relays & Lockout Coils
JoyMonkey:
--- Quote from: sWampy on March 28, 2005, 01:50:51 pm ---$35 for something that controls 8 relays sounds cheap to me, great find. At Radio Shack the relays are about $5 each.
--- End quote ---
Yeah, I think I'll buy it. Of course, since I only really need 3 relays (one for the monitor, one for each coindoor light), I'm going to have to find a few more things to throw in there that could be controled by a relay. I'll add a few more lights I think, I'll have them turn on behind the CP before Mame launches a game.
Is there some way I could use a relay to 'disable' my coin mechs when the frontend is running, then 'enable' them for games. I guess what I'm asking is, is there some way a coin mech can be forced to reject tokens?
Hoagie_one:
one relay can control all of those, assuming they all need to come on teh same time
nostrebor:
The big advantage to JoyMonkey's board is the ability to recieve code from the parallel port to define WHEN to turn the relay on. Hoagie's relay works just great for the 1 switch solution, but it won't hold an arcade monitor in the OFF position until AdvanceOS has loaded. I am looking for a solution like JoyMonkeys, so I can use these arcade monitors I have with AdvanceOS/AdvanceMAME.
Does anyone have a homebrew for this? I really do not need the 8 relays, and I like to build stuff from scratch.
BTW, nice find Joymonkey! Especially when you consider the only other completely safe way to use an arcade monitor is with ArcadeVGA at $100+.
Hoagie_one:
thats a great use for it.
JoyMonkey:
--- Quote from: nostrebor on March 28, 2005, 02:31:42 pm ---The big advantage to JoyMonkey's board is the ability to recieve code from the parallel port to define WHEN to turn the relay on. Hoagie's relay works just great for the 1 switch solution, but it won't hold an arcade monitor in the OFF position until AdvanceOS has loaded. I am looking for a solution like JoyMonkeys, so I can use these arcade monitors I have with AdvanceOS/AdvanceMAME.
Does anyone have a homebrew for this? I really do not need the 8 relays, and I like to build stuff from scratch.
BTW, nice find Joymonkey! Especially when you consider the only other completely safe way to use an arcade monitor is with ArcadeVGA at $100+.
--- End quote ---
You could take a look at the old PC2Jamma parallel port relays, they do much the same thing and were designed to work with ArcadeOS (ie, the monitor doesn't get powered on until ArcadeOS starts up at a safe resolution).
Or, there's a full PDF schematic for the above 8-in-one relay circuit on the suppliers website.
Here's the vintage link http://www.mameworld.net/pc2jamma/phard.html
Reminds me of the 'good old days'.
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