XProg Calculator v2
Cheap calculator that can convert Dec/Hex/Bin (32bits).
Welcome !
I wanted to build a very cheap calculator that can convert Dec/Hex/Bin (32bits) for my own use, and also for testing the integrated "EasyEDA / JLCPCB / LCSC" software suite solution :)
The BOM Cost is < 30$ and can be easily lowered.
This first prototype use the "CH423S" from Nanjing Qinheng Microelectronics.
It should be able to control 16 x 7seg digits for a very low price of US$ 0.31!
The micro-controller is a STM32F4 which is totally overkill for this project but I wanted to be able to reuse this board for other projects later.
Schematics, firmware and datasheet can be found here : https://github.com/bestel74/xprog_calculator
The design is currently a work in progress and NOT TESTED.
If you are interested for building one, please be patient :)
I wanted to build a very cheap calculator that can convert Dec/Hex/Bin (32bits) for my own use, and also for testing the integrated "EasyEDA / JLCPCB / LCSC" software suite solution :)
The BOM Cost is < 30$ and can be easily lowered.
This first prototype use the "CH423S" from Nanjing Qinheng Microelectronics.
It should be able to control 16 x 7seg digits for a very low price of US$ 0.31!
The micro-controller is a STM32F4 which is totally overkill for this project but I wanted to be able to reuse this board for other projects later.
Schematics, firmware and datasheet can be found here : https://github.com/bestel74/xprog_calculator
The design is currently a work in progress and NOT TESTED.
If you are interested for building one, please be patient :)
Updates vom Autor