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DIY Relay Board
TinyLiDAR on a Pi?
Smart Phone (WiFi) Controlled Garage Door Opener With ESP8266
Large Motors Class
Ithink you can get 5V from the Vin pin on the Nodemcu. However the device will output 5V on the echo pin. you will need to protect the input pin with a voltage divider or the like.
DIY Homemade Bath Sponge
IoT Motion Detector With NodeMCU and BLYNK
Internet of Things Class
What You'll Learn
How to Use Arduino I2C Serial LCD 16x2 (Yellow Backlight)
Circuit Board Design Class
Turn a Monitor Into a Family-shared Live Slideshow Album (w/ Raspberry Pi)
Build a ESP8266 Flash Adapter!
Avoid Hard-Coding WiFi Credentials on Your ESP8266 Using the WiFiManager Library
WiFi Weather Display With ESP8266
I've a newbie at these devices and in the process of checking up on them, I've come across the comment that running a transmitter without an antenna can be bad for the transmitter. Sounds like its possible it worked poorly at first and some point after it may have died. Hope not. Good luck.
Raspberry Pi Class
Web control LED(D-duino)
Build an Alexa With Raspio Pro Hat and Raspberry Pi
DIY Voltmeter With Arduino and a Nokia 5110 Display
RC Multi Channel Arduino Proportional Transmitter / Receiver with Button Trimmers
ESP8266 WiFi Module for Dummies
Sensor Array and Monitor