Back in 1978, the world was a bit different. There was no Raspberry Pi, no Internet, and not even an ESP32 to build projects with. And rather than order electronics kits from Tindie or Adafruit, [Dr. Francitosh] selected this binary clock with his mother from a catalog, and made the order via mail. Simpler times. The […]
BINARY CLOCK KIT BLIPS AGAIN Read More »
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 it well enough to answer? [Giovanni Aggiustatutto] was tasked with building an additional ringer for a set of cordless landline phones
A BUZZING, FLASHING PHONE RINGER FOR THE ELDERLY Read More »
[mircemk] had previously built a frequency counter using an Arduino, with a useful range up to 6 MHz. Now, they’ve implemented a new design on a far more powerful STM32 chip that boosts the measurement range up to a full 30 MHz. That makes it a perfect tool for working with radios in the HF range. The
SIMPLE STM32 FREQUENCY METER HANDLES UP TO 30MHZ WITH EASE Read More »
[Josh] has a child and what do children like more than stuffing random things into their mouths? Pushing buttons, twiddling knobs, and yanking things of course! So [Josh] did what any self-respecting hacker would do and built his little man a custom cyberdeck. The build follows the usual route of some electronics wedged into a pelican-style
2023 CYBERDECK CONTEST: A TODDLER’S CYBERDECK Read More »
[Nick Poole] does a lot of custom work with vacuum tubes — so much so that he builds his own vacuum tubes of various shapes, sizes, and functions right on his own workbench. While the theory of vacuum tubes is pretty straightforward, at least to those of us who haven’t only been exposed to semiconductors,
VACUUM CHAMBER GETS AUTOMATION Read More »
Many times, when parking our cars in the garage, we accidentally scratch them against the walls or cause damage due to a lack of visibility regarding the remaining distance between the car and the wall. To address this issue, we can create a straightforward electronic project using Arduino and an ultrasonic sensor. This project aims
Ultrasonic sensor HC-SR04 arduino project with code Read More »
Grizzled veterans of the computing industry will relate stories of submitting projects on stacks of punched cards, something those of us who stored their 8-bit works on audio cassettes could only imagine. But for those who fancy experimenting with the format it’s still possible to make a basic card reader using LEDs and light sensors, as
PUNCHED CARDS ARE IN THE CLOUD, WITH THIS ARDUINO Read More »
Fibonacci numbers are seen in the natural structures of various plants, such as the florets in sunflower heads, areoles on cacti stems, and scales in pine cones. [HackerBox] has developed a Fibonacci Spiral LED Badge to bring this natural phenomenon to your electronics. To position each of the 64 addressable LEDs within the PCB layout, [HackerBox] computed
MATH YOU CAN WEAR: FIBONACCI SPIRAL LED BADGE Read More »
Lumileds has added news LEDs to its Luxeon IR Domed Line with a significant increase in both DC and pulse drive current–up to 1.5A and 5.0A, respectively. The new emitters deliver radiant power of 1350mW at 850nm wavelength (slightly visible) or 1450mW at 940nm (invisible or covert IR). These new IR LEDs are engineered to
IR DOMED LEDS DELIVER UP TO 5.0A PULSED RADIANT POWER OVER 50° Read More »
I have toyed with the idea of building a clock for sometime and my sister had a big birthday coming up so I decided that this was a great opportunity to build a clock for her as a gift. My sister has a PhD in science and works as a science educator so I decided
Arduino Science Clock Read More »
