This old circuit is suitable for signaling applications. The lamp must be incandescent, and the triac must be mounted on a heat sink. The frequency is adjusted in the 1 M trimpot.
This circuit changes the wave shape of a square signal according the values of C1 and R1. Other...
This circuit has an interesting application. If a device with the selector switch in the 110 V...
In this circuit, from a 1977 publication, we have the traditional version of a filter that rejects 1...