This circuit can modulate a laser rate at frequencies of 50 kHz. We found the old documentation. The bipolar transistors can be the BD135 and 136 and the FET admits equivalent.
The oscillator presented uses two inverter buffers as a base and the frequency, which depends on...
We found this circuit in an old English documentation. The idea is a momentary indicator that...
General Electric suggests this circuit in an 80's documentation. The circuit makes use of PUTs...