Not all wheeled carts are created equal when it comes to durability and size, but an Instagram creator stumbled upon an ultra ...

All this talk about 555 timers is causing projects to pop out of the woodwork like this one that reverse engineers a shopping cart security mechanism. The wheel seen above listens for a ...

Shopping carts are surprisingly expensive ... If you left the track, a rod passing through the wheel locked it. A third magnet would disarm the brake when you entered the store again.