Showing posts with label touch. Show all posts
Showing posts with label touch. Show all posts
Wednesday, September 3, 2014
Simple ON OFF Touch Switch with 555 Schematic
This simple ON OFF touch switch schema 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 very close to the schema.
Read more WC fan using 555
Touch plate MP1 in order to close the contact of relay RL1 [ON], or plate MP2 in order to open the contact of RL1 [OFF]. The Led D2 turns on when the contacts of RL1 are closed. Two small pieces of metal can be used as sensor plates.
555 ON/OFF Touch Switch Schematic
Parts List
R1 = R2 = 3.3M
R3 = 10K
R4 = 1K
C1 = 10nF
D1 = 1N4007
Q1 = BC547
IC = NE555
12V relay
Saturday, April 6, 2013
5 VOLT MOMENTARY OPERATION TOUCH SWITCH
This simple circuit uses a single IC to form a nice touch switch circuit. A single transistor forms the remote active switch sensor. Multiple switches can be wired in parallel. The switch circuit can be located about 500 feet from the control circuit.
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