To control the panel, [bitluni] used the ATtiny running the MegaTinyCore Arduino core. Off-the-shelf four-pin magnetic connectors ... created a simple battery module and 3D printed neat enclosures ...

The phone uses an app that talks to the Arduino via Bluetooth, which means the Arduino needs a Bluetooth module. The Arduino ... makes it susceptible to the magnet’s motion.

No doubt, an Arduino can convert your favorite ... are to be driven a PNP transistor can be added to the module's digital output. Here the addition of 2N3906 transistor controls an electro-magnetic ...