This is the circuit of a modified Heathkit kit. The circuit was found in a Radio Electronics from December 1965. The author of the circuit included improvements to the original circuit.
Found in a foreign publication, this sensitive circuit triggers a relay. The voltage depends on...
This circuit also functions as a phase detector. The components used are not common. We found this...
The presented circuit is suggested by Texas Instruments (www.ti.com) in its Application Report...