Sensor Watch (Casio F-91W board swap) By Joey Castillo (Oddly Specific Objects) · Example build · 7 views · 0 remixes A programmable ARM board that replaces the insides of a classic Casio F-91W or A158W, keeping the case, screen and coin-cell battery life 0SaveRemixCopy link Estimated parts costNo price seen yetDifficultyEasyParts1 part · 1 pcs Start the assembly guide →