FET Follower (CB6132E)

This 1967 Electronics World circuit is suitable for frequencies up to 1 MHz. The setting applies to virtually any junction FET.

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Multitester (CB4470E)
This simple multimeter takes advantage of the low cost common galvanometer of 200 uA or 1 mA and...
15 V x 1 A power supply uA723 (CB19023E)
The integrated circuit used in this power supply is no longer very common in power supplies today....
Operational Rectangular Oscillator (CB13241E)
The operational amplifier used in this circuit of an old documentation no longer exists, but the...