HM-13 Dual Mode Bluetooth 4.0 BLE SPP LE Serial Port Module
compatible w/ Bluetooth 3.0/2.1
$6.72 FREE
JY-MCU HC-06 Bluetooth Wireless Serial Port Module
V1.06 / slave module / 3.3V level / Arduino compatible core module
$5.49 FREE
XH-M400 DC-DC DC 4-40V Adjustable High Power Step Down Module (5-Pack)
5-PACK 200W max. power / 8A max. output / XL4016E1 step-down chip / w/ regulator
$15.66 FREE
Keyes ESP32 Core Board for Arduino
$10.38 FREE
XH-W1621 DC 12-24V Digital Thermostat PID Constant Temperature Controller
for incubation heating plate / LCD display
$9.80 FREE
XH-W1621 AC 110-220V Digital Thermostat PID Constant Temperature Controller
for incubation heating plate / LCD display
$9.80 FREE
XH-W1501 24V Adjustable Digital Temperature Controller Board
-40'C~100'C control range / 2CH relay / w/ waterproof probe
$7.34 FREE
KEYES 8-CH 5V Relay Module for Arduino
authentic / w/ optocoupler isolation
$6.80 FREE
Keyes AD8232 Heart Rate Monitor Module
authentic
$6.22 FREE
Keyes USB Host Shield for Arduino
authentic funduino board
$7.29 FREE
 
JY-MCU HC-06 Bluetooth Wireless Serial Port Module
V1.05 / main module / 3.3V level / Arduino compatible core module
 
(1)
$6.00 FREE
JY-MCU 8-Digit 7-Segment Numeric Display (Red) + 8 Push-button Keys + 8 Dual-Color LED Module
TM1638 display driver / chainable / JY-LKM1638
 
(4)
$6.66 FREE
 
JY-MCU 16X Digital Tube Red LED Module
TM1640 chip
$7.89 FREE