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.
Back in 2019 we first came across the mutantC, an open source 3D printable Raspberry Pi handheld created by [rahmanshaber] that took more than a little inspiration from Sony’s VAIO ultra-mobile PCs (UMPCs) from the early 2000s. It was an impressive first effort, but it clearly had a long way to go before it could really be a practical mobile device.
Well after two years of development and three iterative versions of this Linux powered QWERTY slider, [rahmanshaber] is ready to show off the new and improved mutantC_v4. Outwardly it looks quite similar to the original version, with the notable addition of a tiny thumbstick and a pair of programmable buttons on the right side that can be used for input in addition to the touch screen. But inside it’s a whole other story, with so many changes and improvements that we hardly even know where to start.
Designed to make the most of the RP2040 microcontroller, this clever compact keyboard includes a rotary encoder and two expansion ports.
Reddit user “stewartd430” has designed a Raspberry Pi Pico-powered compact keyboard, complete with an expansion port for adding extra hardware to the microcontroller’s general-purpose input/output (GPIO) pins.
“I designed a keyboard PCB for the Pico,” Stewart explains of his project, which builds on earlier efforts including a simpler 20-key macro keypad driven by the same Raspberry Pi Pico board with RP2040 microcontroller. “65 percent layout, with 15 added macro keys and rotary encoder.”
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.
This video is about how to start with Arduino IoT cloud and how to monitor temperature using Arduino IoT Cloud.
Download code from here https://gist.github.com/EDISON-SCIENC…
A modern take on an old classic — create colour pixel art by turning two rotary encoders to control the horizontal and vertical position of the cursor, click to change colour. All controlled by an Arduino Nano.
How it works
10 more 3D printed tools, which could be useful to you. You can buy this kind of tools from store, but why not to 3d print them.
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
Sometimes it can feel like if you have seen one all-in-one (AIO) liquid cooler, then you’ve seen them all, with only minor variations in appearance from one to the next. Barrowch, a cooling product maker in China, found a way to stand out from the crowd: Put a high resolution display on a series of modular CPU water blocks, each complete with an HDMI port.
