This circuit was found in the November 1994 issue of Electronics Now magazine. The circuit is based on the 566 PLL and generates signals up to about 200 kHz.
This interesting adjustable power supply uses the transistors themselves as controllers and...
The operating system used in this circuit of the 1994 Linear Applications Handbook by National...
Found in Unitrode documentation from the 1980s, this circuit makes use of PUTs, currently common...