Audio Frequency Meter (CB20477E)

Found in a Popular Electronics from 1992, this circuit uses a PLL567 in an audio meter bridge that has zero indication via LEDs.

Strobe Relay Drive LM311 (CB4001E)
This circuit can be enabled and disabled by a TTL signal. The relay is a low current reed type and...
Diode Tester (MSB005E)
The circuit shown allows the test of common silicon diodes. The characteristic curve of the...
MAX14744 Multiplexer Switch Array 8 by 4 (COM012S)
May 2016 - Mouser Electronics already have to deliver the new integrated circuit Maxim MAX14724. It...