Based on the BA1404 integrated circuit, this circuit was found in the July 1992 issue of Radio Electronics magazine. The circuit is short range, but a power amplifier stage can be used.
Based on the BA1404 integrated circuit, this circuit was found in the July 1992 issue of Radio...
The figure shows how to change the frequency of a 5 V LED blinking. The capacitor can have other...
In this circuit, which uses one of the four comparators of an LM339 (or LM139 or 239), capacitor C1 and...