Building a timegrapher is quite straightforward, it is nothing more than a piezo transducer connected through to an amplifier. However, in order to actually utilize the results, one need an accurate clock to benchmark the results against.
How should I go about acquiring this signal? The end result should, I suppose, be a input signal that I can feed into the program I use to analyze the sounds from my watch.
I understand that there are USB-powered GPS units that generate a very precise 1 pulse per second (PPS) output. But how do I feed this into my software?
What other (preferably low-cost) options are there?
- Something built using an NTP-server? But will there be problems with lag?
- Building a radio receiver that uses a time signal. I have understood that this can be a bit messy (interference, etc).