With the capacitor used, this circuit provides delays of 40 to 60 seconds. Larger capacitors can be used, and the SCR supports an equivalent. The circuit is from the 1977 RC semiconductor manual.
This circuit consists of a 10 + 10 V symmetrical source that operates from a single 5V input. It is...
This circuit covers the bands from 1.8 to 150 MHz, with plug-in coils whose characteristics are...
In this project, from a Japanese magazine of 1973, only one channel of a stereo amplifier of 20 W...