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Wiring ForumWiring HardwareTangible computing › Frankenstein Panasonic video mixer project

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Frankenstein Panasonic video mixer project (Read 3664 times)
10/23/06 at 23:19:00

movax   Offline
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Greetings.

I have a Panasonic MX30 video mixer sitting around, and most of the buttons are shot.   

So, I'd like to make this thing MIDI controllable.   Cool  I want to simply wire it up so that I can "push the buttons" from a Wiring board.  I will desolder the buttons, and then would like to open/close that connection using a digitally controlable circuit instead.  Based on a transistor, right?  The Wiring Board's digital output will be used to activate/deactivate the connection.

My question is, can anyone point me in a direction for this basic circuit?  This could be passive, right?  Easy stuff for EE but the most I've done with circuits is ATMEGA servo/LED control stuff. 

Thanks ahead of time!
 
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Reply #1 - 10/25/06 at 04:24:28

Alan_Kilian   Offline
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Since you have no idea how the device scans the buttons, you can't just plop in transistors.

But you CAN just plop in reed-relays and drive their coils from a Wiring board.
These are +5 Volts and 400 Ohms, so just bolt them in and drive them.
(Make sure to put a diode across the coil like HERE or you might blow up your CPU.
These babies are US$0.59 each in a pack of ten from: BG Micro site.
 
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Reply #2 - 10/28/06 at 00:34:27

movax   Offline
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Thanks Alan, that makes a lot of sense.  I read the link, very informative.  The reed relays are lookin like the way to go for sure.

Still trying to figure out how to select the protection diode though..

 
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