“no, no, make it stop, please at least use cable ties…”
There are now 20 notes active on the relayboard. This is all the notes I can get working without going back and fixing some dud soldering.
What’s good about the relayboard design?
- It works, and it works reliably. It is odd playing the keyboard and having the organ go off.
- It is electrically very simple, and within even my questionable powers to assemble.
- It is unlikely to explode without warning
What’s not so good?
- It sounds like a room full of people knitting. Sound will follow.
- It gets unseasonably warm. Not too warm, but more so than I am entirely happy with for something that performs such a simple job.
- Corollary: it is probably drawing more current than I’d like.
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I’m still alive, and so is the project!
Relayboard no. 1 is finally complete; this board, to remind any imaginary readers I may have, will electrically replace about half the keys on the top keyboard.
I wonder which species of bird is nesting on my sofa
For the non-electricians: a relay consists of an electromagnet and a little switch in a box, so that when the electromagnet is turned on, then so is the switch; and when the electromagnet is turned off, the switch is turned off. This is nice here, because I don’t trust the electronics inside the organ to be predictable – so I can control the “keys” (the “switch” side of the relay) via another circuit without actually passing any electricity between them. So far, so good.
I have now tested the control side of the board, and it more or less works; next up, testing the switch side of the board.
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