Components
Pinouts, voltage levels and addresses you can trust — then a wiring guide for your exact board.
Sensors
- 10 kΩ NTC thermistor (bead or waterproof probe)≈ ₹40
- A3144 Hall-effect switch (TO-92)≈ ₹15
- ACS712 current sensor (5 A / 20 A / 30 A)≈ ₹150
- AD8232 single-lead ECG module≈ ₹650
- ADXL345 3-axis accelerometer (GY-291)≈ ₹180
- AHT20 temperature + humidity sensor≈ ₹150
- APDS-9960 gesture / proximity / colour sensor (GY-9960)≈ ₹300
- BH1750 lux sensor (GY-302)≈ ₹90
- BME280 breakout≈ ₹380
- BMP180 pressure and temperature sensor (GY-68)≈ ₹120
- BMP280 breakout (GY-BMP280)≈ ₹120
- Capacitive soil moisture sensor v1.2≈ ₹90
- DHT11≈ ₹90
- DHT22 (AM2302)≈ ₹280
- DS18B20 (1-Wire)≈ ₹120
- Float switch (reed, vertical)≈ ₹60
- HC-SR04 ultrasonic sensor≈ ₹90
- HC-SR501 PIR motion sensor≈ ₹90
- HMC5883L / QMC5883L magnetometer (GY-271)≈ ₹200
- HX711 load cell amplifier≈ ₹120
- INA219 DC current/voltage sensor≈ ₹180
- IR flame sensor module (LM393)≈ ₹50
- IR obstacle avoidance sensor (FC-51)≈ ₹40
- JSN-SR04T waterproof ultrasonic sensor≈ ₹550
- KY-038 sound sensor (microphone + LM393)≈ ₹50
- LDR light sensor module≈ ₹40
- LM35 temperature sensor (TO-92)≈ ₹90
- MAX30102 pulse oximeter module≈ ₹200
- MAX6675 K-type thermocouple module≈ ₹250
- MLX90614 IR thermometer (GY-906)≈ ₹700
- MPU6050 (GY-521)≈ ₹150
- MQ-135 gas sensor module≈ ₹150
- MQ-2 gas sensor module≈ ₹120
- MQ-3 alcohol (ethanol) sensor module≈ ₹130
- MQ-6 gas sensor module≈ ₹160
- MQ-7 carbon monoxide (CO) sensor module≈ ₹150
- MQ-9 CO and combustible gas sensor module≈ ₹180
- Pulse sensor (optical heart-rate, analog)≈ ₹150
- PZEM-004T v3.0 AC energy meter (100 A with CT)≈ ₹1,300
- Rain sensor (FC-37 / YL-83)≈ ₹50
- RCWL-0516 microwave radar motion sensor≈ ₹60
- Reed switch / MC-38 magnetic door sensor≈ ₹60
- SCD40 CO2, temperature and humidity sensor≈ ₹3,800
- SGP30 TVOC / eCO2 gas sensor module≈ ₹1,100
- SHT31-D≈ ₹350
- SHT40 temperature and humidity sensor≈ ₹450
- TCRT5000 IR reflective sensor module≈ ₹40
- TCS34725 RGB colour sensor≈ ₹350
- VL53L0X ToF distance sensor≈ ₹250
- VL53L1X time-of-flight distance sensor (up to 4 m)≈ ₹900
- VS1838B IR receiver (38 kHz)≈ ₹30
- Water level sensor (exposed-trace board)≈ ₹40
- YF-S201 water flow sensor (½″)≈ ₹250
- ZMPT101B AC voltage sensor≈ ₹150
Inputs & controls
Clocks & timing
Displays
- 1.8" ST7735 colour TFT (128×160)≈ ₹350
- 16×2 character LCD (1602, parallel HD44780)≈ ₹120
- 16×2 LCD + I2C backpack≈ ₹180
- 20×4 LCD + I2C backpack≈ ₹350
- E-paper display 2.13″ (250×122, SPI)≈ ₹900
- ILI9341 TFT 2.4″ / 2.8″ (240×320, SPI, touch)≈ ₹650
- MAX7219 8×8 LED matrix (4-in-1 FC-16 module)≈ ₹280
- Nokia 5110 LCD (84×48, PCD8544)≈ ₹200
- SH1106 OLED 1.3″ (128×64, I2C)≈ ₹330
- SSD1306 OLED 0.96″ (128×64, I2C)≈ ₹220
- TM1637 4-digit 7-segment display≈ ₹60
- WS2812B addressable RGB LED strip (NeoPixel)≈ ₹350
Actuators & relays
- 1-channel relay module (5 V coil)≈ ₹70
- 28BYJ-48 stepper motor + ULN2003 driver≈ ₹150
- 74HC595 8-bit shift register (DIP-16)≈ ₹15
- A4988 stepper motor driver≈ ₹120
- Active buzzer module (high-level trigger)≈ ₹25
- Coin vibration motor module≈ ₹40
- IRF520 MOSFET driver module≈ ₹60
- L298N dual H-bridge motor driver≈ ₹150
- MG996R metal-gear servo (high torque)≈ ₹350
- Passive buzzer module≈ ₹30
- SG90 micro servo (9 g)≈ ₹90
- TB6612FNG dual DC motor driver≈ ₹150
Communication
- HC-05 Bluetooth serial module≈ ₹280
- HC-12 433 MHz wireless serial module≈ ₹350
- MAX485 TTL to RS485 module≈ ₹60
- MCP2515 CAN bus module (with TJA1050)≈ ₹200
- MicroSD card module (SPI)≈ ₹60
- NEO-6M GPS module (GY-NEO6MV2)≈ ₹350
- nRF24L01+ 2.4 GHz transceiver≈ ₹90
- PN532 NFC / RFID module (13.56 MHz, V3)≈ ₹450
- RC522 RFID reader (MFRC522, 13.56 MHz)≈ ₹120
- RDM6300 125 kHz RFID reader (EM4100)≈ ₹250
- SIM800L GSM/GPRS module (2G)≈ ₹350
- SX1278 LoRa module (Ra-02, 433 MHz)≈ ₹450