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Buy Electronic Parts Online – Trusted by Makers & Students

From basic resistors to smart kits, Electronics Walla offers the best products at affordable prices with fast delivery.

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Showing all 25 results

Sale!

5mm Photosensative LDR sensor

5mm Photosensitive LDR Sensor detects light intensity and changes resistance according to ambient light. Ideal for automatic light control, streetlight projects, and Arduino-based automation systems.

Technical Specifications:

  1. Type: Photoresistor (LDR)
  2. Diameter: 5mm
  3. Operating Voltage: 3V – 5V (typical for interfacing)
  4. Spectral Peak: 540nm
  5. Light Resistance: 5–10 kΩ (under 10 lux)
  6. Dark Resistance: > 1 MΩ
  7. Response Time: 20ms (Rise), 30ms (Fall)
  8. Operating Temperature: -30°C to +70°C
Original price was: ₹14.00.Current price is: ₹10.00.

Digital Touch Sensor TTP223B Module (Capacitive Touch Switch)

TTP223B Digital Touch Sensor Module is a capacitive touch switch that detects touch input without mechanical pressure. Ideal for Arduino projects, DIY electronics, and smart touch control systems.

Technical Specifications:

  1. Operating Voltage: 2.0V – 5.5V DC
  2. Output Type: Digital (Active HIGH)
  3. IC Used: TTP223B
  4. Response Time: 60ms (touch mode)
  5. Output State:
    • HIGH when touched
    • LOW when untouched
  6. Touch Type: Capacitive sensing (no physical contact required)
  7. Indicator: Onboard LED for touch status
  8. PCB Dimensions: Approx. 24mm × 24mm
  9. Output Pin Configuration: VCC, GND, OUT
22.00

ACS712 30A Current Sensor Module

ACS712 30A Current Sensor Module measures AC and DC current up to ±30A with high accuracy using the Hall effect principle. Ideal for power monitoring, motor control, and Arduino-based energy measurement projects.

Technical Specifications:

  1. Operating Voltage: 5V DC
  2. Current Measurement Range: ±30A
  3. Output Type: Analog (proportional to current)
  4. Sensitivity: 66 mV/A (typical)
  5. Measurement Type: AC and DC current
  6. Response Time: 5 µs
  7. Analog Output Voltage: Vcc/2 at 0A current
  8. PCB Dimensions: Approx. 31mm × 13mm
  9. Operating Temperature: -40°C to +85°C
  10. Mounting Holes: 2 × M3 for easy installation
85.00
Sale!

Voltage Detection Sensor Module 25V

Voltage Detection Sensor Module (0–25V) measures DC voltage using a built-in resistive divider circuit. Ideal for monitoring battery levels, power supply voltage, and Arduino-based automation systems.

Technical Specifications:

  1. Operating Voltage: 0V – 25V DC (input)
  2. Output Voltage Range: 0V – 5V DC (scaled down)
  3. Output Type: Analog (proportional to input voltage)
  4. Voltage Divider Ratio: 5:1
  5. Input Impedance: ~100kΩ
  6. Interface Pins: VCC, GND, Signal (S)
  7. Module Size: Approx. 25mm × 15mm
  8. Compatible Controllers: Arduino, ESP32, NodeMCU, Raspberry Pi
Original price was: ₹25.00.Current price is: ₹20.00.
Sale!

Fire or Flame Detection Sensor Module

Flame Detection Sensor Module detects fire or flame sources within a 760 nm–1100 nm wavelength range. Ideal for fire alarm systems, safety automation, and Arduino-based security projects.

Technical Specifications:

  1. Operating Voltage: 3.3V – 5V DC
  2. Output Type: Analog (A0) & Digital (D0)
  3. Comparator IC: LM393
  4. Wavelength Sensitivity: 760 nm – 1100 nm
  5. Detection Range: Up to 100 cm (depending on flame size and light intensity)
  6. Adjustable Sensitivity: Yes (via onboard potentiometer)
  7. Indicator LEDs: Power and Output Status
  8. Interface Pins: VCC, GND, A0, D0
  9. Module Dimensions: Approx. 32mm × 14mm
Original price was: ₹55.00.Current price is: ₹39.00.
Sale!

MPU-6050 3-Axis Accelerometer and Gyro Sensor

MPU-6050 Accelerometer and Gyroscope Module combines a 3-axis accelerometer and 3-axis gyro for motion tracking and orientation sensing. Ideal for robotics, drones, and Arduino motion control projects.

Technical Specifications:

  1. Operating Voltage: 3V – 5V DC
  2. Communication Interface: I2C (SCL, SDA)
  3. Accelerometer Range: ±2g / ±4g / ±8g / ±16g
  4. Gyroscope Range: ±250 / ±500 / ±1000 / ±2000 °/s
  5. Motion Processor: 16-bit ADC for each channel
  6. Sensor Type: MEMS 3-axis accelerometer and 3-axis gyroscope
  7. Operating Current: 3.9mA
  8. Operating Temperature: -40°C to +85°C
  9. Module Size: Approx. 20mm × 16mm × 2mm
Original price was: ₹180.00.Current price is: ₹160.00.
Sale!

PIR Motion Sensor Detector Module HC-SR501

HC-SR501 PIR Motion Sensor Module detects human motion using infrared radiation. Ideal for smart lighting, security alarms, and Arduino-based motion detection systems.

Technical Specifications:

  1. Operating Voltage: 4.5V – 20V DC
  2. Output Type: Digital (HIGH/LOW)
  3. Sensing Range: 3m – 7m (adjustable)
  4. Delay Time: 5s – 5min (adjustable)
  5. Detection Angle: ≤ 120°
  6. Quiescent Current: < 50 µA
  7. Trigger Modes:
    • Non-repeatable (H): Output stays HIGH until delay ends
    • Repeatable (L): Output stays HIGH while motion is detected
  8. PCB Dimensions: 32mm × 24mm × 25mm
  9. Operating Temperature: -15°C to +70°C
Original price was: ₹70.00.Current price is: ₹65.00.
Sale!

Raindrop Detection Sensor Module

Raindrop Detection Sensor Module detects rain or water drops using a conductive rain board and comparator circuit. Ideal for smart irrigation, weather monitoring, and automatic wiper or roof systems.

Technical Specifications:

  1. Operating Voltage: 3.3V – 5V DC
  2. Output Type: Analog & Digital
  3. Comparator IC: LM393
  4. Detection Area: Rain detection PCB plate
  5. Adjustable Sensitivity: Yes (via onboard potentiometer)
  6. Indicator LEDs: Power and Digital Output
  7. Output Pins: VCC, GND, A0, D0
  8. Module Size:
    • Control Board: 30mm × 14mm
    • Rain Board: 50mm × 40mm (approx.)
Original price was: ₹55.00.Current price is: ₹45.00.
Sale!

Soil Moisture Sensor Module

Soil Moisture Sensor Module detects the water content in soil and provides analog or digital output. Ideal for smart irrigation, plant monitoring, and Arduino-based agricultural automation projects. Technical Specifications:
  1. Operating Voltage: 3.3V – 5V DC
  2. Output Type: Analog & Digital (D0)
  3. Comparator IC: LM393
  4. Detection Area: Dual copper probe
  5. Adjustable Sensitivity: Yes (via potentiometer)
  6. Indicator LEDs: Power & Digital Output
  7. Interface: 4-pin (VCC, GND, A0, D0)
  8. Module Size: Approx. 60mm × 20mm
  9. Cable Length: ~20cm (varies by version)
Original price was: ₹40.00.Current price is: ₹35.00.
Sale!

Relay Module (5v, 1 channel)

 
Specification Details
Operating Voltage 5V DC
Channel Single (1-Channel)
Control Signal TTL logic compatible
Load Capacity Up to 10A @ 250V AC
Isolation Optocoupler for safe microcontroller interfacing
Indicators Onboard LED for relay status
Mounting PCB-ready with screw terminals for easy wiring
Applications Home automation, robotics, industrial control, IoT systems
 
Original price was: ₹35.00.Current price is: ₹29.00.
Sale!

HC-SR04 Ultrasonic Distance Sensor Module

HC-SR04 Ultrasonic Sensor Module measures distance from 2cm to 400cm with high accuracy using ultrasonic sound waves. Perfect for obstacle detection, distance measurement, and Arduino-based robotic projects.

Technical Specifications:

  1. Operating Voltage: 5V DC
  2. Operating Current: 15mA (typical)
  3. Measuring Range: 2cm – 400cm
  4. Accuracy: ±3mm
  5. Measuring Angle: ≤ 15°
  6. Input Trigger Signal: 10µs TTL pulse
  7. Output Echo Signal: TTL level pulse proportional to distance
  8. Operating Frequency: 40kHz
  9. PCB Size: Approx. 45mm × 20mm × 15mm
Original price was: ₹58.00.Current price is: ₹55.00.
Sale!

IR (Infrared) Obstacle Avoidance Sensor Module (Range 2cm - 30cm)

IR Obstacle Avoidance Sensor Module detects nearby objects using infrared light within a range of 2cm to 30cm. Ideal for obstacle detection, line-following robots, and Arduino-based automation projects.

Technical Specifications:

  1. Operating Voltage: 3.3V – 5V DC
  2. Detection Range: 2cm – 30cm (adjustable)
  3. Output Type: Digital (High/Low)
  4. Sensing Method: Infrared reflection
  5. Detection Angle: ≤ 35°
  6. Indicator: Onboard Power and Output LEDs
  7. PCB Size: Approx. 4.8cm × 1.5cm
Original price was: ₹45.00.Current price is: ₹28.00.
Sale!

MQ-8 Hydrogen Gas Sensor Module

MQ-8 Gas Sensor Module detects hydrogen (Hâ‚‚) gas with high sensitivity and fast response. Ideal for hydrogen leak detection, gas monitoring systems, and Arduino-based IoT safety projects.

Technical Specifications:

  1. Operating Voltage: 5V DC
  2. Detectable Gas: Hydrogen (Hâ‚‚)
  3. Output Type: Analog & Digital
  4. Detection Range: 100 ppm – 10,000 ppm
  5. Response Time: < 10 seconds
  6. Preheat Time: 20 seconds
  7. PCB Size: Approx. 32 mm × 22 mm
Original price was: ₹110.00.Current price is: ₹94.00.
Sale!

MQ5 LPG Natural Gas Sensor Module

MQ-5 Gas Sensor Module detects LPG, Methane, Natural Gas, and Hydrogen with high sensitivity. Ideal for gas leakage detection, home safety systems, and Arduino-based IoT projects.

Technical Specifications:

  1. Operating Voltage: 5V DC
  2. Detectable Gas: LPG, Methane, Natural Gas, Hydrogen
  3. Output Type: Analog & Digital
  4. Detection Range: 200 ppm – 10,000 ppm
  5. Response Time: < 10 seconds
  6. Preheat Time: 20 seconds
  7. PCB Size: Approx. 32 mm × 22 mm
Original price was: ₹98.00.Current price is: ₹86.00.
Sale!

MQ-4 Gas Methane (CNG) Detector Sensor Module

MQ-4 Methane Gas Sensor Module detects methane (CHâ‚„), natural gas, and CNG with high sensitivity. Perfect for gas leak detection, safety alarms, and Arduino-based IoT monitoring projects.
Parameter Specification
Operating Voltage 5 V DC
Detectable Gas Methane (CHâ‚„), Natural Gas, CNG
Output Type Analog & Digital
Detection Range 300 ppm – 10,000 ppm
Response Time < 10 s
Preheat Time 20 s
PCB Size Approx. 32 mm × 22 mm
Original price was: ₹99.00.Current price is: ₹86.00.
Sale!

MQ-3 Gas Sensor Module for Alcohol Detection

MQ-3 Gas Sensor Module detects alcohol vapors with high sensitivity. Ideal for breath analyzers, safety systems, and Arduino-based alcohol detection projects.
Parameter Specification
Operating Voltage 5V DC
Sensing Gas Alcohol vapors (Ethanol, Methanol)
Output Analog & Digital
Sensitivity Range 0.05 mg/L – 10 mg/L Alcohol
Response Time < 10s
PCB Size Approx. 32mm x 22mm
Original price was: ₹119.00.Current price is: ₹105.00.

MQ-2 Smoke LPG Butane Hydrogen Gas Sensor Detector Module

MQ-2 Smoke & Gas Sensor Module detects LPG, Butane, Hydrogen, and smoke levels in the air with high sensitivity. Ideal for gas leakage detection systems and Arduino-based safety projects.
Parameter Specification
Operating Voltage 5V DC
Sensing Gas LPG, Butane, Methane, Hydrogen, Smoke
Output Analog & Digital
Sensitivity 300–10,000 ppm
Response Time < 10s
PCB Size Approx. 32mm x 22mm
99.00
Sale!

LM35 Board Mount Temperature Sensors

  1. Measures temperature from -55°C to +150°C

  2. Provides analog voltage output (10 mV per °C)

  3. High accuracy of ±0.5°C at room temperature

  4. Operates from 4V to 30V DC supply

  5. Low self-heating for stable performance

  6. Easy to interface with Arduino, ESP32, and other microcontrollers

  7. Suitable for IoT, automation, HVAC, and industrial temperature monitoring

Original price was: ₹65.00.Current price is: ₹50.00.
Sale!

DHT22 Digital Temperature and Humidity Sensor Module

  1. Measures temperature and humidity with high precision

  2. Temperature range: -40°C to +80°C

  3. Humidity range: 0% to 100% RH

  4. Provides digital output for easy Arduino and microcontroller interfacing

  5. Operating voltage: 3.3V to 5V

  6. Comes with an onboard pull-up resistor for reliable signal output

  7. Suitable for IoT, automation, weather stations, and greenhouse monitoring

Original price was: ₹120.00.Current price is: ₹105.00.
Sale!

Hall Effect Sensor

The Hall Effect sensor is a transducer that varies its output voltage in response of a magnetic field. Hall Effect sensors are used for proximity switching, positioning, speed detection, and current sensing applications. In its simplest form, the sensor operates as an analog transducer, directly returning a voltage. Digital Output Hall-effect sensor · Operating voltage: 4.5V to 28V (typically 5V) · Output Current: 25mA ·
Original price was: ₹120.00.Current price is: ₹110.00.
Sale!

LM393 Photosensitive light dependent resistor LDR sensor module

LM393 Photosensitive LDR Sensor Module detects light intensity using an onboard LDR and LM393 comparator. Ideal for automatic light systems, streetlight control, and Arduino-based smart projects.

Technical Specifications:

  1. Operating Voltage: 3.3V – 5V DC
  2. Output Type: Digital (High/Low)
  3. Comparator IC: LM393
  4. Light Sensor Type: Photosensitive LDR
  5. Adjustable Sensitivity: Yes (via onboard potentiometer)
  6. Indicator LEDs: Power & Output Status
  7. Output Interface: 3-pin (VCC, GND, D0)
  8. PCB Dimensions: Approx. 32 mm × 14 mm
  9. Operating Temperature: -30°C to +80°C
Original price was: ₹40.00.Current price is: ₹28.00.
Sale!

RF Wireless Module Pair (433MHZ)

DC 5V 433Mhz RF Wireless Transmitter Module and Receiver Kit

The TX-ASK is an effective low-cost solution for using the 433 MHz frequency. This ASK hybrid transmitter module is designed with a saw resonator, making it small, cost-effective, and easy to use for designing. However, it's important to note that this 433mhz rf transmitter and receiver kit does not support direct UART communication when connected to PCs or microcontrollers due to the high levels of noise on these frequencies.
Original price was: ₹110.00.Current price is: ₹80.00.
Sale!

TTP223 Capacitive Touch Switch Module

The Capacitive Touch Switch Sensor Module is based on a touch-sensing IC (TTP223B) capacitive touch switch module. Allows you to remove the worry of conventional push-type keys.
Original price was: ₹25.00.Current price is: ₹20.00.
Sale!

3 Axis Gyroscope Accelerometer Module

The MPU6050 is an IMU (Inertial Estimation Unit) sensor, a portion of the Micro-Electro-Mechanical Systems (MEMS) family. It highlights a 3-axis accelerometer and a 3-axis gyroscope. The MPU6050 module in addition called a magnetometer sensor.
Original price was: ₹200.00.Current price is: ₹160.00.
Sale!

DHT11 Temperature And Humidity Sensor Module with LED

DHT 11
Original price was: ₹60.00.Current price is: ₹52.00.

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Sale!

Arduino UNO R3 board with DIP ATmega328P

Original price was: ₹550.00.Current price is: ₹450.00.
Sale!

5mm Photosensative LDR sensor

Original price was: ₹14.00.Current price is: ₹10.00.
Sale!

Arduino Starter Kit

Original price was: ₹2,500.00.Current price is: ₹2,300.00.