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For some reason, I’m finding myself very challenged intellectually by the DPDT mod board…
I understand how to use it for a 2 leg component swap. You wire the component across the board horizontally (in the diagram orientation) and then the 2 off board wires replace the component on the host PCB. And for clipping diodes, we assume that multiple diodes have their ends connected together. I got that.
For the trimmer example shown, that assumes that pin 2 and 3 are connected, right? But that isn’t every use case for a pot. Let’s say I have a pot that I want to replace with 2 pots, and the pot has its 3 terminals connected to 3 discrete paths? I will need to add additional wires, correct? The “send” and “receive” (shown in the diagram as blue and purple) would be the wiper (pin 2) but I’d still need to connect pins 1 and 3 in parallel to the host PCB?
Thanks in advance,John
Hey John S. Sometimes you have to stare at it just right to get it to talk to you. I’ve used these little goodies for many purposes. Sometimes beyond their intended purpose. Solid fun from these little guys. Pro tip: You can cut the traces with an exacto knife. More than just four quadrants can be realized once it starts talking to you. Back to your question. Take a look at the 2 Knob Job. What you are asking can be done with a footswitch and also have an led as an indicator with that great board. But if you study that schematic you will see that only 2 wires of the 3 wire pot are switched. One remains common and connected to each other. Therefore this DPDT board can do the same with a toggle as long as you control the ‘common’ connection. Only you don’t have the led bonus. Forget about the trimmer above, its messing with you. This switch and board gives you 2 sides for 2 wires. Cheers
Thanks! Realizing that the 2 Knob Job is the tool for that helped me understand. What I need to do is “translate” the switch to the little PCB board. And cutting traces will help me understand better, too. Adding sockets to this is going to let me build a little test rig, because too often my diode switches don’t do as much as I hope – too subtle. Thanks for the fast reply and the help!
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