Make a simple touch switch circuit. Switch is a component that serves to connect and disconnect the electrical current in a circuit
By using a switch you can turn on or turn off an electronic device
In general, the switch can be set on / off by pressed or rotate it but in this article I will share a series of switch that can on / off equipment just by touch only using your hand
The series of touch switch is a series of electronics that can power appliances by touch
The electric current will be on the touch only while when the touch is released the electric current will stop flowing
how the touch switch circuit works
The touch switch circuit uses the main component of the transistor that serves to amplify the electric current through the base leg and is ejected through the collector’s leg
For this series we use single transistor only because it is enough when used to turn on a led
For an article on how transistors can work read on transistor circuit articles as current amplifiers and switches
As for how the work of the touch switch circuit is when you touches the input of the circuit then the electric charge will flow from the body of the friend to the base of the base of the transistor which will be further amplified by the transistor
a simple touch switch circuit scheme
as for the schematics for a simple touch switch circuit is as follows
in the above circuit if you did not find the transistor for the type BC 547 you can replace it with transistor C945, C828, or transistor like the type of NPN
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The working voltage of the circuit is 9 VDC. But if you use the voltage below 9V then the gain will be slightly smaller but it is not a problem
The resistor function in the above touch switch circuit is to inhibit electric current or to prevent the LED so as not to break
With a simple touch switch circuit 1 transistor above you can light the LED just by touching it, when the touch bud off then the LED light will die
Similarly an article about a simple touch switch circuit. Please also read my article electronic mouse repellent circuit