This circuit was found in a 1977 timer cookbook. The circuit can generate signals with up to 99% active cycle. The FET can be BF245 or MPF102 and the basic frequency given by R1, R2 and C1.
This circuit visually indicates that a high voltage is present in an outlet or other point. The...
This circuit changes an audio signal to get better reproduction. It is important when editing...
We show only one of the channels of an excellent audio preamplifier with the LM382 integrated...