Neon Fuse Blown Monitor (CB24104E)

This circuit was found in the January 1971 Radio Electronics magazine. It keeps the light flashing if the fuse blows.

Audio Visual Thermometer (CB18469E)
This circuit was found in a 1974 publication. It provides a tone indication of the temperature sensed by...
DC Motor Speed Control (CB17401E)
This is a simple rheostat circuit for motor control that works with voltages from 6 to 12 V. The...
1 MHz Colpitts Clock (CB6469E)
This circuit with TTL compatible output was found in a 1968 US documentation. The circuit is...