This converter was found in the June 1991 issue of Radio Electronics magazine. The circuit uses common circuits at the time and its operating range can be changed.
We found this circuit in the July 1988 Radio Electronics magazine. The frequencies are given by...
This circuit can flash for up to 30 months using alkaline batteries as shown in the table next to the...
This circuit was found in a 1969 Mullard documentation. Used transistors can be replaced with...