Test circuit with bridge (CB22530E)

This bridge-biased transistor test circuit measures gain in the range 0 to 300. Circuit is from Radio Electronics June 1952.

Parallel Transformers Power Source (CB20205E)
This configuration (somewhat critical, as the imbalance of characteristics between transformers can cause...
Car Alarm Simulator (CB18821E)
It is a simple blinker that simulates the action of an alarm when installed on the dashboard of a...
Electronic Christmas Tree (CB17040E)
This conventional LED effects circuit uses integrated CMOS. Today we can achieve the same effects...