YouTuber DuctTape Mechanic has published a new tutorial on how you can create your very own Arduino-powered speed bag to count your punches as you work out. This innovative project uses a recessed NPN ...

September 17, 2021 Add as a preferred source on Google Add as a preferred source on Google If you’ve ever walked into a martial arts gym, you’re familiar with the rapid thud-thud-thud-thud-thud of the ...