This is the SB116, an 8-bit programmer’s calculator powered by an Arduino Nano. It features a 128 x ... That helped him to keep the build simple since he didn’t need “to worry about lithium ...

[Peter] first had to optimize the Nano’s ADC so he could get sufficient sample rates for speech processing. Doing a bit of low-level programming, he achieved a sample rate of 9ksps, which is ...