We want to make a simple device. It's a sensor connected to a 555 timer acting as a VCO. There is also a simple NPN transistor which is sometimes turned on. The whole device is operated using usb power from a cell phone and the audio input/output of the cellphone. The audio turns the NPN transistor on. The audio records the output of the 555 timer.
We also need a board designed.
It should take less than a week to complete the project. We will discuss it in more detail if you have a nice bid.
17 freelancers are bidding on average $99 for this job
It's pretty good project i am also looking for this kind of project. I have very strong grip on power electronics device. i can do that. For further satisfaction check my profile.