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.
Found in a 1969 Electronics World, this circuit is intended for amplifying analog cable TV...
Place the lamp on the ignition threshold via R2. Your approach causes it to light up. The secret is...
This circuit has a voltage gain of approximately 100 times and can operate with medium and high...