Maker and calculator fanatic Angel Cabello, discovering nothing available on the market to totally scratch his itch, has designed his personal surprisingly highly effective pocket calculator — which might double as a transportable computing machine for a spread of duties, together with performing as an Web of Issues (IoT) management system.
“I fell in love with calculators,” Cabello explains of the venture’s origins, “however nobody was adequate, so I created my model. [Galdeano Handheld] is a DIY graphics calculator, with a CAS [Computer Algebra System], an algebraic mathematical engine, so you should utilize it to combine, derivate, and do matrix calculations. However for those who dig into it a little bit, you’ll discover an [Espressif] ESP32, with Bluetooth and Wi-Fi connection.”
Designed to imitate the looks of traditional graphing calculators, the guts of the Galdeano is an Espressif ESP32 microcontroller module working a custom-made MicroPython firmware. On this, Cabello has created an LVGL-based graphical person interface for native use – displaying on a shade LCD panel on the high of the calculator and taking enter from a tactile button matrix taking over the majority of its face.
Powered by two AA batteries in its newest incarnation, the calculator can be utilized as-is for a spread of mathematical capabilities. Peer beneath the floor, although, and it’s in impact a microcontroller-driven pocket pc full with Bluetooth and Wi-Fi connectivity: Cabello has used the machine to manage a wise lighting system, as however one instance of why it is higher than something you’d discover on a retailer shelf.
Cabello is promoting the Galdeano Handheld on Tindie at $170 plus transport; the modified MicroPython supply code is revealed to GitHub beneath the permissive MIT license with extra code obtainable in a separate repository beneath the GNU Normal Public License 3.