This common circuit using operational amplifiers was found in the 1993 issue of Radio Electronics Special Projects. The circuit is sandwiched between the pickup and the amplifier input.
This step is also suitable for the AC188k and SK3004 transistors and was found in a 1980s...
This is the receiver circuit for the CB15958E transmitter. Depending on the attenuation obtained in...
This timer is characterized by its simplicity and the fact that it does not need a relay, being...