The sensor uses capacitive sensing, with a plate below each coin slot acting as one electrode ... The software stack seems to be Arduino, with a very simple capacitance testing routine based ...

each coin drops into a separate bin after passing through an optical sensor to count the number of each on an Arduino. Subtotals and a grand total of the haul are displayed on a small LCD screen.

Today, Coin announced that it will offer up an Arduino Bluetooth Low Energy module that’s designed to be small and easy to integrate into hardware hacks and products of all kinds. The $22 kit ...

but it calls for an Arduino Nano, a stepper motor, vibration sensor, and a 9V battery to power everything. It’s designed to work with US $1 gold coins, but those files thankfully come with ...