400KV Pulse Arc High Voltage Generator Module
3.7-7.4V input
$2.06 FREE
DHT22 AM2302 Digital Temperature Humidity Sensor Module
Arduino compatible / w/ 175mm jumper wire
$3.59 FREE
Wemos YX6300 UART TTL Serial Control MP3 Music Player Module
supports microSD/SDHC card for Arduino/AVR/ARM/PIC / 3.2-5.2V operating voltage
$3.22 FREE
XH-W1701 12V High Precision Digital Temperature Controller Board
20'C-90'C control range / w/ waterproof sensor
$4.39 FREE
LCD1602 Arduino Compatible LCD Keypad Shield
2*16 character backlit display
$5.06 FREE
Digispark Kickstarter USB Development Board
support Arduino IDE 1.0+(OSX/Win/Linux)
$5.60 FREE
0.28" 3-Digit LED Voltmeter Module (4-Color / 4-Pack)
4-PACK DC 2.4-30V / red/yellow/blue/green LED light
$5.38 FREE
Nokia 5110 84*48 Graphical LCD Display Module (2-Pack)
2-PACK 4Mbps serial / 8-pin connection / blue backlight
$5.04 FREE
Bluetooth V3.0 MP3 Decoder Board Decoding Audio Player Module
support USB audio / microSD card
$4.77 FREE
DHT11 1-Wire Single Pin Thermometer/Hygrometer Module
Arduino compatible / 0 to 50'C / 20% to 90% RH
$2.32 FREE
DC-DC 0.9-5V to 5V 600mA Boost Converter Step Up Module (10-Pack)
10-PACK w/ USB female
$4.47 FREE
4-Channel 5V/250V AC Relay Module
ULN2003A chip
$4.47 FREE
Micro-USB 1A 18650 Lithium Battery Charging Board Charger Module (10-Pack)
10-PACK 5V input / over-discharge / over-current protection
$4.00 FREE
Microphone Sound Detection Sensor Shield Module for Arduino
digital output + analog output
$2.57 FREE
DHT11 Digital Temperature Humidity Sensor Module for Arduino
detects 20% to 90% relative humidity
$3.68 FREE
2.5" LCD Keypad Shield for Arduino Compatible Duemilanove & LCD
blue backlight / white text
$4.54 FREE