How to make touch sensitive lamp Circuit Diagram (In the following images, a 220 Ω resistor is shown. But it could be a good idea to use a larger value like a 470 Ω resistor to make sure your LED can handle the current.) Step 3: Place The LED And Touchpad. Now, you're going to connect the LED and the touch-sensing part. For the touch-sensing part, you'll need two exposed wires. a Touch Dimmer Switch using Arduino. The Touch Dimmer Switch Circuit is implemented using a Touch Sensor. This sensors are activated with the touch of human skin or a stylus holding an electrical charge. Fig -2: Touch Sensor 1.3 Aurdino In default the Arduino is not equipped with a display to visualize measuring-data, for example from your
Figure 1. Phase control waveform for an AC mains voltage dimmer. Image source: LEDnique.com. Your LED circuit is low voltage, requires DC current and therefore will not work with this circuit. Don't be tempted to supply the 12 V power supply from a dimmer such as this. It won't like it. See the linked article for more information.
TT6061A and TT8486A sensitive touch light dimmer circuit with ... Circuit Diagram
How to Design Touch Dimmer Switch Circuit ? The design of the Touch Dimmer Switch Circuit is very simple and is explained here. The touch sensor is given the power supply by connecting 5V to VCC and ground to GND pins. The SIG pin of the touch sensor is connected to any of the digital input / output pin of the Arduino UNO board.
At the third touch, the bulb is driven fully. Another touch puts off the light. The touch dimmer is built around 8-pin CMOS IC TT8486A/TT6061A specifically manufactured for touch dimmer switches applications. Since the IC is highly sensitive, use a long wire to connect the IC to the touch sensor. The circuit uses minimum external components.
Touch Dimmer Switch Circuit using Arduino Circuit Diagram
The size and shape of the touch-sensitive area depend on your lamp design and personal preferences. When designing the touch-sensitive area, consider the following factors: Size: The touch-sensitive area should be large enough to accommodate a human finger comfortably. A diameter of around 1 inch (25 mm) is usually sufficient.
Now, if you touch the touch plate, the bulb glows dimly. On second touch, the bulb gives medium light. At the third touch, the bulb is driven fully and another touch puts off the light. This sensitive touch light dimmer circuit uses minimum external components and can be used for 110V or 220V AC by simply changing some external components .
