On the What I Made Today blog, they pose the question “How many hours in your life have you spent troubleshooting a project?” when breadboarding designs.

A loose connection obviously. Right? A faulty Dupont wire?

So you change the wires one at a time, laboriously disconnecting your spaghetti, making sure to place each new wire into precisely the right breadboard hole. As you do so, it disconnects from the other end, then you laboriously do the same with your device’s pins.

How many times have you discovered that it was, in fact, a faulty wire? I know I have. Dozens of times. I must have spent scores of hours fault-finding, only to find that some stupid wire was invisibly disconnected from its little pin.

So a Dupont wire tester would be a very handy things!

Check out the video below and more in the article here.