Using standard resistor values can greatly impact ... has three arguments and returns a single value. The arguments are: 1) an arbitrary value in Ohms; 2) a desired tolerance value (1%, 2%, “E12,” ...

Save guides, add subjects and pick up where you left off with your BBC account. This resistor with bands of red, violet, yellow, and gold has a value of 270,000 ohms (270kΩ) with a tolerance of ±5%.

so he built a talking resistor calculator to speak resistor values to him. The electronics part of the build is extremely simple with just an MCP3208 ADC providing 12 bits of resolution.