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 |

10 MHz Tuned Resonator Oscillator (CB6142E)
This circuit was found in a 1980s documentation for amateur radio. The circuit makes use of...
Redisparable Monostable with the 4047 (CB11444E)
A positive transition in the trigger makes the outputs change state and remain so for the time...
Benchtop Power Supply 0 to 15 V x 1 A (CB17211E)
This traditional transistor source uses only two transistors found in a 1998 documentation. The...