LED Unijunction Flasher (CB16933E)

This ultra-low power circuit makes the LED flash. The circuit is powered by 15 V in this application, but must operate from 6 V.

Undervoltage Detector (CB6524E)
Found in a 1980s documentation, this circuit detects when the voltage drops below 11 V. Other...
Magnetic Head Preamplifier (CB18898E)
This is a commercial circuit from a Japanese publication from 1972. The circuit uses a FET that...
FM modulator with 555 (CB12102E)
In this circuit we show how to modulate the pulses produced by a 555 in frequency. The circuit can be...