Touch Switch With Lamp DIY Experiments Science STEM KIT (Assembled), 100% Tested
Original price was: ₹1,025.00.₹327.18Current price is: ₹327.18. + GST
- Touch Switch with Lamp Complete assembled Kit, 100% Tested.
- Includes full documentation, circuit diagrams, PCB layout, testing documents, and YouTube videos for easy understanding.
- 100% support available on working days (11 AM – 6 PM) via email: smartxbrains@gmail.com.
- Fastest delivery across India, perfect for various electronics projects.
- Reliable and high-performance STEM KIT designed for educational and automation applications.
100 in stock
100 in stock
100 in stock
102 in stock
Abstract:
The Touch Switch with Lamp circuit is based on a readily available touch sensor, comparator IC LM393, and relay. The touch sensor acts as the touch detector, while the IC LM393 functions as a comparator. In the absence of touch, the touch sensor remains non-conductive, and the LED stays off. When touch is sensed, the touch sensor becomes conductive, and the LED glows.
Application of the Circuit:
Traditional touch sensor-based circuits often use costly and complex components. However, this Touch Switch with Lamp circuit leverages a readily available touch sensor, reducing cost and simplifying the circuitry. The circuit automatically activates the LED in the presence of touch, providing a continuous glow, signaling touch detection.
Why This Circuit:
The touch sensor is easily modifiable by simply touching it with a finger. Operating over a DC voltage of 5V (via a DC supply cable), this circuit is efficient and straightforward for various applications.
Explained Working of the Circuit:
The core idea is to turn ON the LED when a touch is detected. The touch sensor converts touch into electrical energy, while the IC LM393 functions as a comparator. The relay acts as a switch—normally closed contact becomes open, and normally open contact becomes closed. The LED remains off when no touch is detected but glows when touch is sensed.
How to Build:
Carefully study the manual, circuit, PCB layout, and components before soldering. Use color-coded resistors and ensure correct component placement, particularly paying attention to polarity-dependent components like diodes and electrolytic capacitors.
Testing the Kit:
After assembly, connect a 5V DC power source. Manually touch the sensor; the LED will glow if working correctly. Adjust the R2 variable resistor to set the desired light intensity.
ICs Used:
LM393 – A dual differential comparator IC, widely used and popular.
Part List:
- Semiconductors:
U1 – LM393 (8-pin comparator) - Resistors:
R2 – 10k Ohm (variable)
R3 – 1k Ohm
R4 – 1k Ohm
R5 – 10k Ohm
R6 – 10k Ohm - Capacitor:
C1 – 1uF - Miscellaneous:
D4 – Touch sensor
D1 – Red LED
D2 – Green LED
5V USB Cable
PCB
LED
Relay
Key Applications:
Used widely in electronic circuits, automation, robotics, and educational projects. Optimized for reliable performance in India-specific environments and conditions.
Keywords:
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- Touch Switch With Lamp price.
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