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.
Other operational amplifiers can be used on this unit gain amplifier. The circuit is from the 1993...
January 2017 - Pulse Electronics ER11 transformers with high insulation can be obtained from...
This circuit was found in a 90’s Electronic Engineering. The integrated circuits are of the time...