Touch ON/OFF Switch
₹150.00
In StockA Touch ON/OFF Switch is an electronic circuit that allows a device to be turned on or off by simply touching a sensor pad or wire, instead of using a mechanical switch. It works by detecting a small electrical signal from the human body (capacitive or resistive touch) and using that to toggle the output state.
These switches are commonly used in modern electronics, home automation, and DIY projects due to their durability, aesthetic appeal, and user-friendly operation.
Description
A Touch ON/OFF switch is a modern electronic switch that responds to human touch instead of physical pressing. It eliminates the need for moving parts, making it more durable, reliable, and easy to integrate into sleek designs.
How It Works:
Touch switches generally work in two ways:
1.Capacitive Touch: Detects the change in capacitance when a human finger touches a metal plate or sensor area.
2.Resistive Touch: Detects a small current flow caused by the natural conductivity of the human body.
This signal is processed by:
- A transistor circuit (for basic designs),
- A flip-flop or latching relay to maintain ON/OFF state,
- Or a touch sensor IC like TTP223, AT42QT1010, etc.
Once the touch is detected, the circuit toggles its output — turning the connected load (like an LED, fan, or light) on or off.
-
An AND gate can be built using BC547 NPN transistors, a common general-purpose transistor used in digital circuits.
The circuit represents both the inputs A & B for the AND gate and Output, Q, which also has a +5V supply to the collector of the first transistor, which is connected in series to the second transistor, and an LED is connected to the emitter terminal of the second transistor. The inputs A & B are connected to the base terminal of Transistor 1 and Transistor 2, respectively, and the output Q goes to the positive terminal LED.
₹190.00













