A calculator with an extensive diagnostic mode on an 8-layer 72x50cm PCB. I used 477 TTL circuits to build this device.
Calculator symbolic mathematics integral derivates
Use Arduino to make a 15x 7-Segment LED, 1284p calculator.
Graphics calculator with a math engine in a M5 stack hardware
If you need fast access to function values but no space in SRAM you can either save them in a csv-file or ask the preprocessor to do it.
