Audio Booster (CB6181E)

This reinforcing stages from a 1960s documentation. No information is given about the transformer and the transistor admits equivalents.

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Signal Generator (CB22032E)
The range of generated signals depends on coil L1. The circuit was found in old English...
Astable 555 with low active cycle (CB6353E)
This circuit was suggested by Electronic Engineering in a 1980s publication. The circuit makes use...
FET and 555 Tachometer (CB25542E)
This automotive tachometer circuit uses a FET and a 1 mA full-scale instrument. We found it in the...