This small source for low consumption projects was found in an old national documentation. The transistor is for general use and the transformer has 50 to 100 mA of secondary current.
Here we have an interesting circuit found in a 1981 publication that causes two LEDs to flash...
This circuit was found in Delco documentation from 1965. The transistor is of the time, but any...
This circuit transmits signals to an FM receiver at a distance of up to a few tens of meters. The...