Train Speed Signaling Adapted For Car

One major flaw of designing societies around cars is the sheer amount of signage that drivers are expected to recognize, read, and react to. It’s a highly complex system that requires constan…

A Vernier Take On A 3D Printer Extruder Indicator

A common way to visualize that a 3D printer’s extruder motor — which feeds the filament into the hot end — is moving is to attach a small indicator to the exposed end of the motor…

A 555 Can Even Make Your Car Indicator More Visible

Modern cars often come with white marker lights or daytime running lights that are on all the time, as a supplement to the primary headlights. The problem is that in some vehicle designs, these add…

Do-Everything LED Indicator Light Runs From 4V To 60V

If you’re working with 3.3V or 5V circuits, it’s easy for you to throw on a power or status LED here or there. [Tom Gralewicz] has found himself in a pickle, though, often working on pr…

Cat Skull For Internet Connection Divination

[Emily Velasco] has an internet provider that provides sub-par connectivity. Instead of repeatedly refreshing a browser tab to test if the network is up, [Emily] decided to create an internet statu…

Interfacing An Old Engine Cowl Flaps Indicator To USB

[Glen Akins] had a WW2-era aircraft engine cowl flap indicator lying around (as you do) and thought it would make a jolly fine USB-attached indicator. The model in question is a General Electric mo…

Magic Eye Tubes Go Solid State With This Plug-In Replacement

Perhaps nothing added quite so much to the charm of vacuum tube circuits from back in the heyday of the vacuum tube as did the “Magic Eye” indicating tube. With the ghostly green glow o…