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.
August 2016 - It can be purchased from Mouser Electronics new chips from Dialog Semiconductor, the...
Found in an American leaflet from the 90s, this circuit uses an AM radio out of station to monitor...
This very low consumption circuit can be powered by a solar cell. The time indication is given by a...