This is a very simple touch sensor switch that is build with the 555 timer IC. ... Touch Sensor Switch Circuit with 555 timer. February 27, 2013 by P. Marian ... circuit diagrams and crazy projects ...

This ON OFF touch switch circuit is based on the well known timer IC 555 (IC1), which drives a relay that acts like a switch. The metal surfaces can have what form we want, but it should be clean and ...

Here’s your useful and beautiful circuit for the day — [New Pew]’s vibration sensor takes manual control of the flip-flop inside a 555 timer and lights an LED in response.Use it to detect ...