Diymore NodeMcu Lua V2 CP2102 ESP8266 ESP-12E WiFi Module Wireless Micro USB Interface 4MB Internet of Things Development Board

1byone Easy Chime Wireless Doorbell Kit, 1 Receiver & 1 Push Button with Sound and LED Flash, 36 Melodies to Choose, Battery Operated

30 Pcs Double Sided PCB Board Prototype Kit for DIY, 4 Sizes by Paxcoo

HiLetgo New Version ESP8266 NodeMCU LUA CP2102 ESP-12E Internet WiFi Development Board Open Source Serial Wireless Module Works Great with Arduino IDE/Micropython

HiLetgo 2pcs Wemos D1 Mini Development Board ESP8285 V1.0.0 1MB Flash Lite Wireless WiFi Internet Development Board Wemos D1 Mini ESP8285

E-Projects - 2N2222 - General Purpose Transistor - NPN - TO-92 (25 Pieces)

Gikfun 7 Kinds of 2.54mm Breakaway PCB Board 40 Pin Header Kit for Arduino Proto Shield (Pack of 48pcs) EK8402

Uxcell a13101800ux0531 P/N B-30-1000 200M 30AWG 8-Wire Colored Insulation Test Wrapping Cable

Gikfun OPTOCOUPLER DIP-4 PC817C PC817 for Arduino Diy (Pack of 20pcs) AE1143

Elegoo 17 Values 1% Resistor Kit Assortment, 0 Ohm-1M Ohm (Pack of 525) RoHS Compliant

Makerfocus 4pcs ESP8266 Esp-01 Serial Wireless Wifi Transceiver Module Compatible with Arduino