Obviously, the solution is an electronic lap counter, which [Peter] promptly set about creating. The build is based around an ultrasonic distance sensor, which is triggered when it detects a ...

When you see the officials place the lane counters at the far side of the pool and you search for your swimmer behind the blocks getting ready, and then you spot them. 3. Nope, skip lap 1.

For his first project using the TI Launchpad [VOJT4] built a lap timer and counter for slot cars. For us it’s always hardest to come up with the idea of what to build and we think he found a ...