
STEM EdKit Box
Arduino UNO HK$105
Bread board Full size HK$45.95, half size HK$14.23
LED Matrix 8x8 Dot MAX7219
LED Red, Green, Blue, Yellow 1 each HK$10.00
1602 16x2 character LCD display HK$41.63
Photoresistor (Light-Dependent Resistor) x2 HK$2.50 each
10 kohm potentiometer x2
Infrared (IR) receiver TSOP4838 HK$14.84
Remote controller HK$40
L293D IC Motor controller HK$78.71
WS2812B LED strip wired in series HK$50
RFID reader + tags (RC522 card read antenna and MFRC-522 module HK$42.00
PIR motion sensor (HC-SR501) HK$46.51
DC 5V Relay module HK$36.50
MQ2 gas /smoke sensor HK$54.28
HC-SR04 Ultrasonic sensor HK$19.00
8-bit shift register 74HC595 HK$15.25
OLED display 25mm x 14mm, 128 by 64, I2C HK$66.58
DHT 11 Temperature and humidity sensor HK$47.33
BMP180 barometric sensor HK$42.73
RTC (Real Time Clock) module, DS1307 RTC HK$35.62
Piezo-electric buzzer HK$21.90
Sound sensor module HK$30.20
Servo motor 180 degree HK$17.00
Soil moisture sensor HK$15
Bluetooth module HC-05 HK$21.51
Push button x3 HK$5 each
10 kohm resistor x2 HK$2 each
220 ohm resistor x2 HK$2 each
Jumpers wires HK$10
Dupont wire (M-F) x10 HK$10
Dupont wire (M-M) x10 HK$10
SD card HK$30
SD card module HK$31.41
Water pump (3V to 6V DC for Arduino) HK$51.08
Robot chassis (TT motor, wheels x 4, power pack, or tailor made) HK$150.00
SIM900 GSM Shield HK$418.01
XD-05 Data logging Shield HK$71.55
Ethernet Shield (WIZnet W5100) HK$80
Temperature sensor DS18B20 -55C to +125C HK$24.95
Tool (Screwdriver, multi-meter, pipe)
Smart City EBox
GY-906 non-contact infrared temperature sensor module (PIN VIN/GND/SCL, SDA) HK$88.11
Saltwater battery Zn/Cu/Zn/Cu/Zn/Cu/Zn/Cu cell in series
Metal detector (coil + magnetic sensor)
Peltier device 4cm x 4cm + Heat sink (Refrigerator)
Color sensor, Digital 3.3V I2C RGBW color sensor VEML 6040 (PIN VIN/GND/SCL/SDA) HK$62.58
SD Card module + SD card
MQ135 CO2 gas detector module HK$44.18
Fish tank automatic WiFi fish food feeder auto dispenser HK$178.51
Ultra-apacitor light chasing car set HK$150
Weather station (Temperature, humidity, barometer)
Display LED matrix + Sound buzzer + LED lamp set
Thermal conductive grease