PROTOTYPE SODIUM ION BATTERIES IN 18650 CELLS
French researchers have announced a prototype of an 18650 sodium-ion battery. If you’ve gotten a powerful LED flashlight, a rechargeable battery pack, or a–ahem–stronger than normal LASER pointer, you’ve probably run into 18650 batteries. You often find these inside laptop batteries and –famously– the Tesla electric automobile runs on a few thousand of these cells. …
RETROCOMPUTING ON A CHIP
new electrical elements allow us to reconstruct old wiring a lot more efficiently. Especially, the easily accessible as well as affordable FPGA kits which offer the possibility to put together wiring of lots of old computers as an “on-a-chip” solution. When I handled to get a hold of an old bubble LED screen as well …
NTP, RUST, as well as ARDUINO MAKE A PHENOMENAL frequency COUNTER
Making a microcontroller perform as a frequency counter is a fairly simple task including the measurement of the time period during which a number of pulses are counted. The maximum frequency is nevertheless restricted to a fraction of the microcontroller’s clock speed as well as the accuracy of the resulting instrument depends on that of …
NTP, RUST, as well as ARDUINO MAKE A PHENOMENAL frequency COUNTERRead More
ASK HACKADAY: ARE EXTRUDERS THE only possible tools FOR TOOLCHANGING?
Toolchanging in 3D printers is no longer something from the bleeding edge; it’s going mainstream. E3D has a top quality set for a toolchanger as well as movement system, our own Joshua Vasquez has shared details about the open-source toolchanging Jubilee design, as well as just just recently Prusa3D formally revealed the Prusa XL, which …
ASK HACKADAY: ARE EXTRUDERS THE only possible tools FOR TOOLCHANGING?Read More
ARDUINO DRIVES synthetic SPIROGRAPH
The holidays always remind us of our favorite toys from when we were kids. Johnny Astro, an Erector set, and — of course — a Spirograph. [CraftDiaries] has an Arduino machine that isn’t rather a Spirograph, but it sure reminds us of one. The Arduino drives two stepper motors that connect to a pen that …
LIVESCRIBE SHUTS DOWN developer PROGRAM
[Kelly] sent in a tip saying that Livescribe, the company behind a remarkable smartpen able to record handwriting, was shuttering the developer program by taking down their dev forums and removing the SDK, taking away the ability to write custom apps. [Kelly] posted about this on her blog. Livescribe has a thriving community around it …
USING fishing wire TO HOLD IN PIN HEADERS IS A NIFTY trick
working on a breadboard, one can get used to the benefits of being able to readily plug and unplug jumper wires to reconfigure a project. One could only dream of doing so with PCBs, right? Wrong! [Stewart Russell] recently shared a tip on Twitter on how to do just that, with the help of a …
USING fishing wire TO HOLD IN PIN HEADERS IS A NIFTY trickRead More
PAPER CRAFT CLAW
get hold of some stiff paper and get to work building your own paper claw. [Dombeef] posted the instructions to recreate the claw above because he was unsatisfied with his previous design which was flimsy and unable to pick up just about anything. This version is a bit larger and it internalizes all of the …
BUILDING A LIGHTSABER and scoring A world RECORD, too
As we all know, the lightsaber is an sophisticated weapon, for a a lot more civilized age. [Alex Burkan] is doing what he can to bring that technology to fruition, and even secured a Guinness world record in the process. Melty melty. The build counts on an electrolyzer, splitting water into hydrogen and oxygen gas …
BUILDING A LIGHTSABER and scoring A world RECORD, tooRead More
BRING A MINITEL terminal BACK TO LIFE WITH AN ESP32
most of us who are old sufficient are likely to have had our very first experience of an on the internet service a long time in the 1990s, either with the likes of Compuserve or via an ISP. For our French visitors the on the internet experience will have come much earlier, as a forward-thinking …
BRING A MINITEL terminal BACK TO LIFE WITH AN ESP32Read More