Looking to build a simple sine or square wave generator that i can know what frequency it is outputing. That is, either have a way to set the frequency "exactly", or have a built in frequency counter to display to me what the frequency is. I want to be able to accurately calibrate older automotive tachometers. Would really like the frequency accuracy to be less then 2hz (this equals 50rpm on a 4 cylinder auto). So the ranges I need are below.
If not easy to build, can someone point me to something on fleabay that would work, for no more then maybe $100?
square or sine pulses, +/- 5v or +/-12V, or 0-5 or 0-12V DC.
frequencies in the range of 133Hz to 600Hz.
If not easy to build, can someone point me to something on fleabay that would work, for no more then maybe $100?
square or sine pulses, +/- 5v or +/-12V, or 0-5 or 0-12V DC.
frequencies in the range of 133Hz to 600Hz.