Potentiometers or solid-state dimming circuits have often been used to control an LED’s intensity, however a wireless method provides greater remote control.
Requiring a few digital I/O pins to operate, a simple matrix keypad provides users a convenient way to input data and interact with Raspberry Pi based projects.
The Pi Weather Shield is a perfect tool for measuring the world around your project, on the move or not, with Atmosphere IoT Studio stay updated everywhere.