When work on an engine manage circuit [Scott] discovered himself in requirement of a method to compare the performance of two manage circuits at once. The pastime high quality oscilloscope he has wasn’t as much as the task. After believing about it for a bit he ended up utilizing his ears as the oscilloscope.
The signals he was measuring are well fit for the difficulty as they fell within the human variety of hearing. He utilized some cable wrapped around each of the three conductors on the jack of his headphones in buy to link them to a breadboard. then he just linked each channel to one of the motor motorist circuits, as well as linked the typical ground. Listening to the intonation of the pitches in each ear he was actually able to tune them up.
If he had been trying to find a certain frequency he might have utilized his noise card to take as well as examine a sample. however balance was what he needed right here as well as you need to admit that this was an simple as well as creative method to get it!