This circuit behaves as a voltage controlled resistor and can serve as a small load. The circuit is from a Radio Electronics from July 1988.
This low noise microphone preamplifier circuit was found in American documentation from the 90s....
This circuit is from the LM317's own manual obtained from an old documentation. The IC should be...
The idea of this 1982 Experimenters Handbook circuit is to generate an RF signal in L2 that can be...