Romi Encoder Pair Kit, 12 CPR, 3.5-18V SF_Audio Boards The kit includes an expansion

The kit includes an expansion PCB with all of the surface-mount parts populated

For a simpler carrier of the qik's motor driver

this UART Infrared CO2 Sensor is a high-performance sensor that combines technology of mature infrared absorption gas detection with precision optical circuit design as well as sophisticated circuit design

I love the MP3 Music Maker shield and the Audio FX Sound Board + 2x2W Amp

The shield relies on the Si7021 and MPL3115A2 Arduino libraries

Romi Encoder Pair Kit, 12 CPR, 3.5-18V SF_Audio Boards The kit includes an expansionAdd quadrature encoders to the mini plastic gearmotors on your Romi chassis with this kit that uses a magnetic disc and Hall effect sensors to provide 12 counts per revolution of the motor shaft. The sensors operate from 3. 5 V to 18 V and provide digital outputs that can be connected directly to a microcontroller or other digital circuit. Overview This kit includes two dual channel Hall effect sensor boards and two 6 pole magnetic discs that can be