If you have a Wemos D1 mini card and you want to test the series of sensors contained in the package "37 in 1 Sensor Module Board Set" which is sold by many sites you can use this shield.
On the shield are available many connectors that are already properly connected with the digital or analog ports of the Wemos D1 mini card. On the board there is also already a power supply stage that allows powe...
An Arduino development board with a small OLED screen, a joystick, buttons, buzzer, and alligator clip connectors for other devices. This was inspired by the Adafruit circuit playground: https://www.adafruit.com/product/3000
Visit http://johan.vandegriff.net/ArduinOLED/ for more info.