Retro Unit Converter Is A Neat Little Gadget

These days, unit conversions aren’t something we have to worry about so much. If you’re sitting at a computer, you can usually just tap away in your browser to get a quick conversion do…

1D Fireworks Are Nice And Quiet

Maybe you do it out of respect for the dogs and parents of young children in the neighborhood. Or maybe you do it because they’re harmful to the environment, or just because it’s too da…

Toy Gaming Controller Makes The Big Leagues

Some of the off-brand video game consoles and even accessories for the major brands can leave a lot to be desired. Whether it’s poor build quality or a general lack of support or updates, the…

A Buzzing, Flashing Phone Ringer For The Elderly

For a lonely person, elderly or otherwise, the sound of a ringing phone can be music to the ears, unless of course it’s another spam call. But what good is a phone when you can’t hear i…

Classic 1960s Flip Clock Gets NTP Makeover

Many of the clocks we feature here on Hackaday are entirely built from scratch, or perhaps reuse an unusual display type. But sometimes, an old clock is just perfect as it is, and only needs a bit …

Custom Thermostat PCB Connects Boiler To Home Assistant

Thanks to Home Assistant, automating the various systems that run your home is easier than ever. But you still need to make a connection between those systems and your Home Assistant setup, which c…

Battery-Powered ESP8266 Sensor? Never Been Simpler

Say, you’re starting your electronics journey with a few projects in mind. You have an ESP8266 board like the Wemos D1, a Li-Ion battery, you want to build a small battery-powered sensor that…

Tiny Berlin Clock Replica Also Counts Seconds

If you’re a clock aficionado and have ever visited Berlin, you’re probably familiar with the Berlin Clock on Budapester Straße: a minimalist design of yellow and orange lights that disp…

The Wireless PS/2 Keyboard That Never Was

The PS/2-style port was once about as ubiquitous on PCs as USB connectors are today, and more than a few of us accumulated a fair collection of keyboards and mice that sported the 6-pin mini-DIN pl…