Bilateral current source 2 (CB20819E)

We found this circuit in an American publication from the 1980s. Equivalent modern operational amplifiers can be used.

Flasher (CB11524E)
This CMOS Flasher was found in a Popular Electronics from 1978. It can still be easily assembled, as all...
Time Delay Generator (CB5150E)
This circuit was found in an old manual of linear integrated circuits of the 80's. Equivalent...
LED PWM control 555 and LM350 (CB17288E)
With this circuit you can control up to 3 A of LEDs in different sequences, using a PWM...