This circuit was found in a 1967 US documentation. The circuit applies to modern general purpose transistors. The circuit has no offset. The power supply must be symmetrical.
This circuit was obtained in a 1982 English magazine. It is a regulator for outputs between 1 and...
The times for this timer, found in a 1997 documentation, can be adjusted to 30, 60 and 90 minutes. The...
This circuit was found in a 1994 documentation. Speed measurement pulses are obtained by a reed...