This circuit is from 1975 documentation. Transistors such as 2N3055 can be used and the transformer is of a special type. R1 is 200 ohms and R2 is 10 ohms.
This is one of the possible timer configurations with the 555. We found it in October 1986 Radio...
This circuit consists of a Step-Down converter (voltage reducer) that can provide a 5 A output with...
The circuit shown in the figure makes possible to control a servomotor from a remote oscillator using a...