Collaborate Disseminate
Pinball machines were the video games of their day. Back when they were king, there were no microcontrollers — everything was electromechanical. We know from experience that fixing these was …read more Continue reading Pinball with No Computers
There are many ways to lock a door. You could use a keypad, an RFID card, a fingerprint or retina scan, Wi-Fi, Bluetooth, the list goes on. You could even …read more Continue reading Flashlight Door Lock Is a Bright Idea
When we first saw [Maarten Tromp]’s article about a “momentary latching switch” for guitar effects pedals, we have to admit to being a bit confused. When it comes to push-button …read more Continue reading Two-Channel Guitar Stomp Box Makes Momentary Switches Latching
It looks like [Michal Zalewski] is raising the next generation the right way. First, his eldest son asks for help building a one-bit computer from discrete transistors. Not to be …read more Continue reading Partial Relay-Based Calculator Puts the Click Where it Counts
Living in a place where the electric service isn’t particularly reliable can be frustrating, whether that’s because of a lack of infrastructure, frequent storms, or rolling blackouts. An option for …read more Continue reading Automatic Transfer Switch Keeps Internet Online
There’s much truth in the advice that, to truly understand something, you need to build it yourself from the ground up. That’s the idea behind [Christian]’s entry for the Re-engineering …read more Continue reading Hackaday Prize 2023: Building a Relay ALU
Here at Hackaday, we love following along with projects as they progress. That’s especially true when a project makes a considerable leap in terms of functionality from one version to …read more Continue reading Spy Transceiver Makes Two Tubes Do the Work of Five
It doesn’t matter how you pronounce it, because whichever way you choose to say “GIF” is guaranteed to cheese off about half the people listening. Such is the state of …read more Continue reading Mechanical GIF Animates with the Power of Magnets
A “Check Engine” light on your dashboard could mean anything from a loose gas cap to a wallet-destroying repair in the offing. For [Dean Segovis], his CEL was indicating a …read more Continue reading Replace Your Automatic Transmission With a Bunch of Relays
For prototype electronics projects, most of us have a pile of resistors of various values stored somewhere on our tool bench. There are different methods of organizing them for easy …read more Continue reading Programmable Resistance Box