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  1. babawushika

    BT139F triac replacement

    Hi everyone, I used to design PCBs, but it was 15 years ago. Now I am in IT. I had a deducted evaporative cooling system. It has a PCB controller. Starting this summer (in Australia), when the temperature is not too high, it works fine. When it is really hot, it shuts down and the water valve...

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