Mini drill control (CB8767E)

This control for 12 V drills was found in a 90s Elektor. The components are current, and Q1 can be replaced by a TIP42 mounted on a heat radiator.

| Clique na imagem para ampliar |

Neon lamp driver with the 555 IC (CB8133E)
Found in an American documentation from the 90's, this circuit aims to light a neon lamp with...
Active Tone Control (CB18728E)
This transistor circuit consists of a well-known bass and treble control configuration. The...
Audio Generator (CB26025E)
This circuit was found in the September 1997 issue of Electronics Now magazine. The circuit uses...