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I am no longer maintaining the electronics sections of this site. For an explanation, see the electronics contact page. |
A touch switch is a switch that is turned on and off by touching a wire contact, instead of flicking a lever like a regular switch. Touch switches have no mechanical parts to wear out, so they last a lot longer than regular switches. Touch switches can be used in places where regular switches would not last, such as wet or very dusty areas.
| C1 | 1 | 10uF 16V Electrolytic Capacitor | |
| R1, R2 | 2 | 100K 1/4 Watt Resistor | |
| R3 | 1 | 10 Meg 1/4 Watt Resistor | |
| U1 | 1 | 4011 CMOS NAND Gate IC | |
| MISC | 1 | Board, Wire, Socket For U1 |
1. The contacts an be made with just two loops of wire close together, or two squares etched close together on a PC board.
2. When activated, the output of the circuit goes high for about one second. This pulse can be used to drive a relay, transistor, other logic, etc.
3. You can vary the length of the output pulse by using a smaller or larger capacitor for C1.