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Need help with T2 solenoid driver circuit!

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1UP:

Hey Dave, do you at least have the source for the T2 keyboard LED hack so I can recompile it with the latest Mame?  I can't get the old DMame hack to work with XP!  That way I'd have at least one gun working.

Is there any way I could use a transformer or some other method to step my Ipac's 5V control signal down to the 1.2V that the relay wants, while raising the Ipac's ouput current from 10ma to the 20-50ma for switching?

Dav:

Send me an email and I'll send it.

The Ipac current will raise automatically and attempt to put out 50 ma, that is the problem.   I'm sure you could use a small transistor, but i don't know a enough about transistors to tell you which one.  I don't mess them much.  Maybe one of the electronics gurus can help.

 I know a little more about digital components.  You could hook up a 4066 switch.  It works like a relay.  You put in 5v and it closes the switch,  you could use it to ground your relay.  I don't know how much current it handels but it's a quad switch, you could use all 4. The big advantage would be it would isolate your ipac from damage.  But you'd need to check how much current it puts out and draws.

Dave


Beley:


--- Quote ---Is there any way I could use a transformer or some other method to step my Ipac's 5V control signal down to the 1.2V that the relay wants, while raising the Ipac's ouput current from 10ma to the 20-50ma for switching?
--- End quote ---


A transformer wouldnt work, they only work for AC, like Dav said you could try using a 4066 but it might not handel the current.  An easer (and better solution IMO) is to use an opto-isolator, which is just as easy to hook up and would protect your Ipac from almost anything.  I would recoment using something like a 4N33. connect the LED outputs to pin1 and 2, and connect the relay to pin 5 and +1.2 and collect pin 4 to ground.




1UP:

Good to see this topic is still alive!  I'm kind of at a standstill until I have a good finished design and the proper software to drive it.  But I'm absolutely not going to finish my cab until I get this working!!

ErikRuud:

1Up,

Here is an idea for you to think about.

Use one of the Weeder boards, or some homebrew cicuit, to control a motor.  This motor would rotate your control panel for you.

The same thing could be done for rotating monitors.

Just some food for thoufght.




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