This circuit was obtained in a 1975 documentation. The maximum frequency depends on the diodes and the FET. Type 1N34 diodes and a FET BF245 can be used for frequencies up to 100 MHz.
This SCR relaxation oscillator was found in an 80's Electronic Design. It flashes a small...
The coils for this transmitter, found in a 2002 documentation, have the following characteristics: L1 - 4...
This dimmer configuration is quite old, as it was found in a 1967 publication. The triac can be of...