6d ago

self actuating toggle switch?

I have a pet project I've been working on to modernize an electric organ console, and one of the final things needed are toggle switches. On a modern organ these are able to be manually toggled, or they can be flipped up/down programmatically using electromagnets (video). The ones purpose built for this are obscenely expensive but I can't find anything even remotely similar. Am I crazy for thinking this kind of switch are used in more things than just organs?

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The only thing I've seen that automatically toggles a switch is a useless box.
I've been looking for a self-toggling switch off and on for awhile now.
- well dang. The ones I linked are $35-55 a pop new and the organ I have would need roughly 73 of them lol. Barring a miracle find from someone I'm assuming the touch screen I've been using is there to stay.
  
  I just had another thought on this. A servo isn't just a rotational actuator like a motor. It is also an encoder (Potentiometer). It knows what position it is in, and can be back-driven into a different position. You can use a servo as both the physical toggle and as the actuator to flip that physical toggle.
  https://learn.adafruit.com/analog-feedback-servos/servos-as-input-devices
  You can modify regular servos to break out the wiper; you don't need to purchase a special feedback servo.
  
  You could potentially use servos to toggle regular switches.
  But I'd go with the other route: momentary switches, latches, and some kind of indicator. The latches can be driven in parallel by either the momentary switches or your electronics.
  RGB keyswitches might be an option for both the switch and the indicator.
  
  Neat idea with the key switches. Could be multiplexed like a keyboard matrix. With smart LEDs and some way to multiplex the output stage as well (or some shift registers), this could be nicely implemented one an esp32 or something.

7 comments