Whiteboard sketches. The question at the top: how is this better than just looking at the test strip? Below it, mirror vs no mirror, and the four steps: replace the test strip, put in the sample, press the button, wait for the result.
What I changed
Hardware and code
The first version: a flat white box with two wells, an LED matrix lit under one and a frosted dome over the other.The electronics on the bench: a colour sensor, a servo-driven tray, three LEDs and a button on an Arduino Uno, with the readings in the serial monitor.
See it move
Hex Bowl on the kitchen counter, next to a jar of pickles and a plate of kimchi.← Back to all things
