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.
This circuit is triggered by the touch of the fingers on a sensor. The sensor is formed by two...
The LM2904 is not very common today, but common comparators and operationals can be used in the...
This circuit is based on the Linear Technology LT1495 and was found in a 2005 manual. The circuit...