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.

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 ...