Schmitt Trigger (CB21849E)

We found this circuit in the 1974 Ferranti transistor manual. Transistors are from the time, being general purpose types.

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Accelerated Sequential with the 4017 (CB12138E)
This circuit is from a 1982 publication. It is a sequential effect of accelerated LEDs. The...
3-voltage monitor (CB21524E)
This circuit was obtained from an Electronic Design from 1964. The components used are from the...
Treble Booster (CB14957E)
This circuit reinforces the treble, working as a booster for instruments or home theater. The...