Categoria: Hackaday (https://hackaday.com/)
A Low-Cost Spectrometer Uses Discrete LEDs and Math
A spectrometer is a pretty common lab instrument, useful for determining the absorbance of a sample across a spectrum of…
Let it Snow with a sub $100 snowmaking machine.
[Mattmopar] figured out how to get a white Christmas even if the weather isn’t frightful. He built a simple DIY…
Playing Around with the MH-CD42 Charger Board
If you’ve ever worked with adding lithium-ion batteries to one of your projects, you’ve likely spent some quality time with…
20 GHz LNB Testing and Teardown
Many things have combined to make very high-frequency RF gear much more common, cheaper, and better performing. Case in point:…
Lathe Gears Make a Clock
When you think of making something using a lathe, you usually think of turning a screw, a table leg, or…
LDU Decoded: The Untold Tale of LEGO Dimensions
LEGO bricks might look simplistic, but did you know there’s an actual science behind their sizes? Enter LDUs — LEGO…
Do You Know Vail Code?
Alfred Vail (public domain) We talk about Morse code, named after its inventor, Samuel Morse. However, maybe we should call…
A Mechanical Calculator For The Modern Age
There was a brief period through the 1960s into the 1970s when the last word in electronics was the calculator….
A LoRa Rain Gauge from the Ground Up
It’s a fair bet that most of us have a ton of wireless doo-dads around the house, from garage door…
Blinded by the Light: the Problem with LED Headlights
Having a good set of (working) headlights is a crucial feature of any motor vehicle, assuming you want to be…
