We found this circuit in a 1971 documentation. The circuit can be assembled with more modern transistors such as BC548 for Q1, BC558 for Q2 and BD135 for Q3.
This integrator circuit uses the junction FETs which can also be the BF245 or MPF102. The...
This circuit can be used in alarms, data links or áudio links using IR radiation. The circuit is...
This oscillator can use inverters or connected AND or NAND gates as such. The signal produced with...