When you’re debugging a board which has an ESP32, Raspberry Pi, or Arduino, it’s easy to slap on a small LCD display or connect via WiFi to see what’s wrong. At least, that’s what the kids are doing. But what if you’re old-school or you don’t have one of those pimped-out, steroid-filled boards? A resistor and an LED will often suffice. Powering the LED means one thing and not powering it means another. And with seven more LEDs you can even display 0-255 in binary.
[Miguel] is clearly in the latter camp. To make debugging-with-LEDs easy, he’s come up with an 8-LED board complete with resistors. He’s even included the Gerber files needed for you to make your own. One row of pins are all connected together and the other row are not. So whether you’re using common cathode or common anode depends on how you orient the LEDs when you solder them in place. You might perhaps have one board of each type at the ready.
But who are we kidding? This is just plain fun to have on a breadboard. Show your prototype doohickey to a friend and you know they’ll be drawn to the little binary counter in the corner pulsing 42 or counting down until it starts flashing 255.
At risk of getting too feature-rich, you could then add two keys for a binary keyboard or add more LEDs to display 32-bit binary Unix Epoch time and see how long until your friends figure that one out.
Continue reading “See Binary On Your Breadboard”
Do you have 835 servo motors sitting around? Why not build your own binary wood-pixel-display-device?
Using the same basic concept as a DMD (Digital Micromirror Device) — the heart of all DLP projection technology — an artist created this wooden mirror. It features 835 wood “pixels” which are controlled by servo motors. Each pixel or wood chip can flip 30 degrees down, and 30 degrees up. A series of spot lights shining on the mirror provides lighting so shadows form when the pixels are “off”. The result is quite fascinating.
A small camera mounted in the middle of the display takes a black and white image of whoever (or whatever) is standing in front of the mirror. A bit of image processing later, and the mirror displays what it sees.
Continue reading “Making a Wooden Multi-Mirror Display Device”
After just one prototype, [Elia] has finished his super awesome Binary Wrist Watch.
He designed the PCB in KiCad, using a template for the PIC he found in a standard library — unfortunately it turns out the SSOP-20 PIC footprint in this library was actually a TSSOP-20. Confusingly enough, there was also a TSSOP-20 footprint in the library. Luckily it’s just a few millimeters off so [Elia] was able to just bend the pins in a bit before reflow soldering it in place.
The trickiest part of the project was actually making the wristband. He tried several different styles before settling on a paracord braid design he found on Instructables.
We especially like his quote at the end of the project:
Although not having worn the watch in the presence of normal humans, I can already guarantee that now everyone will be able to easily identify me as a nerd.
Acceptance is the first step in realizing you have an addiction, right?
[via Dangerous Prototypes]