Non Inverting Amplifier (CB6433E)

Based on an operational of the time, this Popular Electronics circuit can be designed with any equivalent operational.

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5 V x 2 A Power Supply (CB24187E)
This 5 V power supply for TTL circuits was found in an article that taught how to assemble a test...
Telephone Line Simulator (CB16790E)
This circuit allows you to simulate an analog telephone line for the repair and testing of...
4-Quadrant Multiplier (CB24753E)
Found in July 1983 Radio Electronics magazine, this circuit uses a transconductance operational...