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Topic: Sensing induction welding machine on/off (Read 438 times) previous topic - next topic


The OP did say they want 20 of these, so it's possible that there might be more than one unit fairly close by. For that reason I thought the RF route might not be so reliable.
As for 500-600kHz being in the radio broadcast band, yes, if you happen to use Medium Wave.

I missed that response. Then, just use a wire to pick up the RF and a diode/resistor/capacitor to produce 5 volts dc from the RF in each machine. Forget the radio.


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