Canadian electronics geek and nascent YouTuber [Technoyaki] wanted to measure 20 volt signals on his Arduino ... out of sixteen resistors, four op amps and a separate 6 VDC supply.

When you want to measure temperature with an Arduino or other microcontrollers ... Unable to find a commercial amp to meet his needs, [MonkHelios] built his own thermocouple amp for microcontrollers.

An optimal way to determine an op amp's input capacitance. Steps involved in making the input-capacitance measurement. 1. With a series resistor at the op-amp input, the input capacitance of the ...