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Been waiting years for one of these, it came on sale so I snatched one up!
“UPDATE” I created a Youtube Video :
After a few months of working on this project it’s finally into the next stage! the PCB stage 😛
I have to admit, I had some issues, but not because of the circuit issues, but because of the lack of looking at the CORRECT pin out’s on the “VOM” ic 🙂 Stumbled upon my issue when going through my notes & measuring every point with my DMM, after I realized that I wired the VOM backwards and then connecting it properly IT SPRUNG to life! DERP! Live and learn !
And I did a little Video of it too !
I’ve been working on this for a very long long time ! And first I would like to say Special thanks to Thomas Uhd Larsen, a good close friend of mine on Facebook for helping me and making this possible 😛
Now, what is a SSR ? A “SSR” is a Solid State Relay, in audio they are used on the speaker output of an amplifier to protect the speaker if anything goes wrong with the amplifier. When an amplifier has problems or is going to blow up or has blown up, it sends FULL DC voltage AKA rail voltage to the speaker terminals VERY BAD and this will COOK your voice-coils and spew out TONS of smoke 😛 Not something you want !
Tipically in amplifiers they use “relays” but this is much better and faster 🙂
Short story of the circuit is here : https://sound-au.com/articles/mosfet-relay.htm
But mine is a bit different 😛 Pictures below ! When the led is on, the FETS are on passing audio signals! When the led is off! it’s in protect mode !