For frantic hacking sessions where seconds count, this forearm mounted oscilloscope with fingertip probes built by [aniketdhole] might be just what you need. Well, maybe. It’s not immediately clear why you might want to wear an oscilloscope on your arm, and sticking your fingers inside of powered up electronic devices sounds specifically like something your mother probably told you not to do, but here it is anyway.
In this episode I will ditch the idea of an ultrasonic mist maker and instead focus on more common fog/smoke machines. I will show you how they use “fog juice” in order to create smoke and at the end I will come up with my own crude mini fog/smoke machine design that did actually work. Let’s get started!
The PySpectrometer allows users to measure homemade dye lasers’ wavelength and perform spectroscopy on the cheap.
Les Wright developed PySpectrometer, a Python (OpenCV and Tkinter) implementation of an optical spectrometer. The device enables users to measure the wavelength of homemade dye lasers and perform spectroscopy at an affordable cost.
I’m preparing a video where I show you how to make the PCB design and order the panel version for your board and then solder all components at once. In that way you can save time and finish your product faster so they will be ready for sale. To do that I need a reflow hot plate and that’s what we will build today using a second-hand clothes iron. We need to measure the temperature, show the power and that temperature on a screen so the user could see the values, we need to control power and in this case a lot of power because my iron is of 3000W, and then we need to have some sort of menu or control in order to select the settings. Let me show you what parts we need, the connections I will do, how to measure and control the temperature at high power and also show you the code. Finally, let’s see if this homemade reflow hot plate will work and if I can reach the desired temperature curve, so what do you think, will it work? So, guys, let’s get started.
The Altair 8800 is one of the most important machines in computer history and many consider it to be the first personal computer. But not many computer users today would recognize it as such. At release, it couldn’t even output video and users could only interact with the Altair 8800 through a terminal or the front panel. Now you can relive history by emulating an Altair 8800, complete with front panel, on your Arduino Mega.
Dipping a rock into chemicals until it becomes a computer chip; Upgraded Homemade Silicon IC Fab Process
When The Simpsons first appeared, we were all watching it on CRT televisions, many of which probably weren’t widescreen. Oh how times have changed, but someone has created the classic Simpsons viewing experience using a miniature reproduction of the famous family’s own TV.
Reddit users buba447 posted a video of his replica Simpsons TV, which looks exactly like the TV found in the cartoon family’s home. It uses a 640-by-480 TFT panel and is housed in a 3D-printed casing. Inside is a Raspberry Pi Zero running Jesse Lite and a 32GB SD card containing 11 seasons of the show to watch.
It is probably well known by now that COVID-19 can cause serious side effects in people that last for months at time, meaning that recovering from the disease can be an arduous process. Some symptoms include trouble breathing, heart inflammation, and blood clotting, so being able to track these conditions as they progress is vital to ensuring ongoing safety for a patient. In response, Kamrul Hussain created the Vital Care project and entered it into element14’s Design for a Cause 2021 contest, where makers were challenged to use the Arduino Nano 33 IoT in some way for the good of humanity.
Take your soldering on the go with Electronoobs’ battery-powered iron!
A sizable soldering station is great for when you’re at a permanent workbench. However, if you find yourself in some far-off location, perhaps without access to mains power, this DIY battery-powered soldering iron from Electronoobs may be just what you need.
The device weighs in at just over 100 grams, and while a bit chunky compared to many plug-in irons, it packs a 4.2V battery inside the handle itself. It also features an OLED screen and interface buttons. Power output to the tip is regulated through PWM, using an IRF7424 MOSFET.
The company will begin mass production in 2022
Something to look forward to: Solid-state batteries are still nebulous outside of the lab. Still, automakers are scrambling to be the first in the race to build the first electric car to take advantage of the added energy density and better safety when compared to lithium-ion designs. To that end, they’re investing in companies like QuantumScape, Solid Power, and Sakuu to develop manufacturing techniques that either build on existing approaches or rely on new additive manufacturing technology.
