This circuit supplies 115 VAC (not perfectly sinusoidal) from a car battery. The circuit is from a Radio Electronics from December 1968.
This circuit monitors extra-low frequency (ELF) fields. We found it in an American documentation from the...
We can use any type of resistive transducer with central resistance in the range of 10 k ohms to 1...
This circuit controls two lamps so that when one increases in brightness the other decreases. The...