Most newer cars already have a display showing you how efficiently you are driving. Usually this takes the form of a digital readout showing you miles driven per gallon of gas over 2 time-frames: short term (instantaneous) and long term (average). Wouldn’t it be cool to add this feature to older cars?
For our demo, we used an OBD extension cable and shorter wire to the NeoPixel. Alternatively, we could have plugged M2 directly into the OBD2 port and ran longer wires to the LED display. For the test drive, we just stuck the LEDs and M2 to the dash with double-sided tape.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.