Nikola Tesla 12 Posted April 9, 2017 Sometimes I just don't feel like dragging out my trusty Timegrapher T1000 and setting it up to check the calibration on a watch. This got me wondering if there might be an app for a smartphone that's able to do this with a little less fuss. As it turns out, there is, and the app I settled on is from THESE GUYS. But here's the rub - it only works with a suitable microphone or sensor. I thought a piezo guitar pickup would do the trick if I stuck it in a little hobby box and ran it into a microphone preamp before connecting to the mic input of my phone. The project was more involved than I would have liked, but turned out pretty cool. This is the mic preamp kit that I bought ... And here's a shot of the guts of little beat amplifier box after everything was installed ... A beauty shot from the top ... Here's a shot of the unit timing my BR02 ... And a close-up of the display on my phone ... The app enables me to add watches to my database and save timing runs for replay later. Also, the graph auto-scales based on how fast or slow a watch is running, and the color of the graph line changes to indicate how good (green), average (orange), or bad (red) things are going. :) Pretty cool little app. It won't replace my T1000, but it's great for when I'm feeling too lazy to haul out the Big Gun. Cheers! T- Share this post Link to post Share on other sites
BabaNJ 38 Posted April 9, 2017 Oh what lengths we go through to feed our ocd's ummm i mean our watch hobby. Good work bro. Share this post Link to post Share on other sites
ryaku 3 Posted April 10, 2017 I wish I could that myself. Good job! Share this post Link to post Share on other sites
