The smallest coins fall out of the bowl first, followed by the bigger coins; each coin drops into a separate bin after passing through an optical sensor to count the number of each on an Arduino.

The sensor uses capacitive sensing, with a plate below each coin slot acting as one electrode of a capacitor and a copper-clad board hidden in the upper plate acting as the second.

The Coin Arduino-BLE kit is designed to simply that by offering a pre-rolled solution, completely with open-source software that will go up on Github in December, which is when the boards should ship.

It features over 5,400 projects, ranging from simple tutorials — like using a soil moisture sensor with Arduino — to more complete guides like building a Bluetooth-controlled car.

Time of Flight Sensor (VL53L0x) Pellet Level Monitor with Arduino Cloud. Posted: May 6, 2025 | Last updated: May 6, 2025. Hi, I'm Bill. I'm a software developer with a passion for making and ...

In Insert Coin, we look at an ... SparqEE CELLv1.0 is a compact certified cellular board that plugs directly into Arduino and the Raspberry Pi shields, letting you piggyback on networks all over ...

In Insert Coin, we look at an exciting new tech project that requires funding before it can hit production. If you'd like to pitch a project, please send us a tip with "Insert Coin" as the subject ...

In what must be the antithesis of a piggy bank, maker Jonathan Whalen has used 3D printing and an Arduino to make a Super Mario question block that mimics the in-game item, as long as you provide ...

Nordic Semiconductor has announced that wireless startup 'Open Source RF' has launched on KickStarter.com the world's first 'Arduino' compatible open-source micro-computer that can communicate ...

Researchers at the University of Texas at Dallas have built a small, inexpensive sensor they say can tip you off if you're at risk for Type 2 diabetes — the world's leading cause of amputations ...