1-quadrant logarithmic converter (CB7333E)

This temperature compensated circuit was found in a Popular Electronics from the 90s. Integrated circuits and transistors are from that time.

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Bridged Output Operational Power Amplifier LM12 (CB14391E)
In the figure we have the way to connect two high power operational amplifiers LM12 to double the...
Solenoid Current Monitor (CB5399E)
This circuit uses the Linear Technology LT6505 and was found in a 2005 manual. The circuit is for 24 V...
Lamp Flasher LM3909N (CB4556E)
a This circuit was obtained from a 1978 Practical Wireless. It causes a low-power 1.5V lamp to...