Null Indicator (CB21930E)

This bridge was found in a Raytheon transistor manual from the 1960s. The transistors are germanium from the time.

Lights On Reminder (CB12637E)
This circuit activates the horn if the door is opened with the headlights on. The circuit is for...
High Side Transimpedance Amplifier (CB5228E)
This circuit for Laser Diode power was found in a 2005 Linear Technology manual. In the diagram...
Grounding Test (CB13252E)
This circuit tests whether electronics are properly protected with internal grounding. If the...