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A copy of the Little Bear MC-03 with relays?

renaudrenaud

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Apr 20, 2019
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Hello, I hope the electronic masters will read the following lines and help me to understand if it is a correct way to do it.

I was looking for a box allowing me to select between 2 or 3 inputs and route the one selected to the output. I found the Nobsound little bear really interesting for my needs:

Screenshot from 2021-05-25 12-59-38.png


Well, this is just a passive box with connectors.

Because of the price, I was wondering if I can do something by myself. The idea is to use this kind of really inexpensive relays to do the job:

Screenshot from 2021-05-25 13-08-07.png


I can control these relays easily with any micro-controller and add an LCD screen to write something.

So my main question is: does this kind of relays are correct for audio usage?
 

somebodyelse

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Dec 5, 2018
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They'll work, but they're designed for switching power rather than signals. You should be able to find similar boards with signal relays instead, or make your own with signal relays, stripboard and a ULN2003 or similar to drive the relay coil
 
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