100 kHz Calibrator (CB5607E)

This circuit was obtained from Popular Electronics of the 1990s. The circuit uses common transistors today and the frequency is given by the crystal.

| Clique na imagem para ampliar |

Buffered TTL or CMOS oscillator (CB24725E)
This circuit shows how to use the remaining gates of a 4093 or 74C14 as amplifiers. The circuit has...
TL3780 Touch switch (COM137E)
November 2016 - The TL3780 ultra-miniature E-switch touch switches can now be obtained from Mouser...
Long-time 1 Hz flasher (CB25423E)
This circuit is powered by 1.5 V and has a long lifespan as it consumes only 320 uA. The circuit is...