This document describes a clap switch circuit that can control devices without physically touching switches. The circuit uses a NE555 timer and CD4017 counter IC. When a clap is detected by a microphone, it triggers the NE555 to produce a clock pulse that makes the CD4017 counter change states. Each state controls an output that can turn on a device. Up to 10 devices can be controlled in this way by clapping once to turn on the first device, clapping again to turn on the second, and so on.