DIY air quality monitor is based on Wemos D1 mini ESP8266 board, Sensirion SGP41 TVOC sensor

AirGradient DIY air quality monitor

Open AirGradient is a DIY air quality monitor based on the Wemos D1 mini ESP8266 WiFi IoT board programmed with Arduino and fitted with a range of sensors including an optional Sensirion SGP41 TVOC sensor through a custom PCB designed with EasyEDA. Two versions of Open AirGradient are available. The Basic model includes an OLED display, a Plantower PMS5003 PM sensor, a Senseair S8 CO2 sensor, and SHT30 or SHT31 temperature & humidity sensor, while the Pro version adds a larger display, a plastic enclosure, and support for the SGP41 TVOC sensor. Open AirGradient key components: MCU board Basic – Wemos D1 Mini Pro Pro – Lolin D1 Mini v4 with USB-C port Display Basic – Wemos OLED shield Pro – 1.3-inch OLED display Sensors Plantower PMS5003 PM sensor Senseair S8 CO2 sensor SHT30 or SHT31 temperature and humidity sensor module Optional Sensirion SGP41 TVOC & NOx sensor (Pro version […]

Learn soldering and programming with the Arduino Make Your UNO Kit

Arduino Make Your UNO Kit is a kit with two boards, one for the microcontroller and the other for audio, and all components required that can be used to learn how to solder and then Arduino programming. Once soldering and assembly are complete you’ll hopefully get a working Arduino UNO and an audio synthesizer shield. But before you get there, you’ll need to equip yourself with a soldering iron and some soldering tin to solder the components below to the two PCBs. Package content: Arduino Make Your UNO board’s components Make Your UNO PCB Socket for ATMega328p MCU Microchip ATmega328p 8-bit AVR microcontroller USB Type-C serial adapter board Various 1k Ohm, 10k Ohm. and 1M Ohm resistors 3x Ceramic capacitors (22pF) 3x Electrolytic capacitors (47uF) 7x Polyester capacitors (100nF) 1x 1N4007 diode 1x 16MHz crystal 4x Yellow LEDs, 1x Green LED 1x Push-Button 1x MOSFET 2x I/O connectors 6-pin header […]

SBC Case Builder 2.0 released with GUI

SBC Case Builder 2.0 tool to create enclosures for single board computers has been released with a customizer graphical user interface, additional cases & SBCs, support for variable height standoffs, and more. We wrote about the SBC Case Builder tool to easily generate various types of 3D printable enclosures using OpenSCAD earlier this year. The SBC Model Framework used in the solution was focused on ODROID boards, and you had to type the parameters in a configuration file.  SBC Case Builder 2.0 software changes that with a convenient-to-use graphical interface allowing for the dynamic adjustment of any of the case attributes. The new version of the software also supports variable height standoffs, multi-associative parametric accessory positioning, and offers 8 “base cases”, namely shell, panel, stacked, tray, round, hex, snap, and fitted. The solution works with 47 SBCs defined in the latest version of the SBC Model Framework. The following SBCs […]

ELLO LC1 – A 2mm thin DIY “computer” based on Microchip PIC18 8-bit MCU

We often write about business card or credit card-sized boards, but it’s only true for 2D dimensions, as most boards are over a centimeter thick, with possibly the thinnest we’ve covered being the Khadas Edge2 SBC that’s just 7mm thick. So Kn/vD took it upon himself to build a DIY computer that was really about the size of a credit card, and came up with the ELLO LC1 based on a Microchip PIC18 8-bit microcontroller, featuring an integrated display and keyboard, and powered by a coin-cell battery. It’s just 2mm thin. ELLO LC1 specifications: MCU – Microchip PIC18 (PIC18F47Q83-I/PT) 8-bit microcontroller with 13KB RAM and 128KB flash, out of which 64KB are reserved as user file storage Display – 20×4 character text panel (Display Visions EADOGM204N) Keyboard – 48x touch panels on the PCB Expansion – 12-pin unpopulated header for debugging (ICSP) and GPIO expansion Misc – Power button Power […]

$60 Raspberry Pi Mini Tower NAS kit takes one M.2 SATA SSD

Last year, Michael Klements made a nice-looking DIY Raspberry Pi 4 mini server with an OLED information display and a 52Pi UPS Plus module with 18650 batteries. It also included the company’s Ice Tower module for cooling, but if you wanted one you had to make your own with a 3D printer and a laser cutter. 52Pi appears to have noticed and liked the design, as they created something similar with the Raspberry Pi Mini Tower NAS kit taking one M.2 SATA SSD instead of using the UPS module. There are also a few tweaks to the mechanical design with the OLED display at an angle for easier reading. 52Pi Raspberry Pi Mini Tower NAS kit features and content: Designed for Raspberry Pi 4 SBC (not included) 3D printed case plus acrylic covers for each side 52Pi Ice Tower for cooling 2x 0.96-inch 128×64 I2C OLED displays (but only one […]

Making a DIY 10.1-inch All-in-One PC out of AMR5 Ryzen 5 gaming mini PC

Hey Karl here. The first thing I need to do is thank the manufacturer of the brand Ace Magician for sending over a unit of their AMR5 gaming mini PC to more or less play with. I did a tiny bit of benchmarking along the way. This is the last time you will see the system in this state 😀 Story time. I have been really wanting a Steam Deck. But we purchased a Nintendo Switch about a year ago and it has barely been used. As soon as my son picked it up he asked why it was so laggy and has shown very little interest in it. So that got me worried about purchasing essentially a one-trick device. There have been a couple of good attempts at a DIY Steam Deck and I wanted to experiment with a small form factor. I went into this with a general […]

Ortur LU2-10A 10W laser module issues and measuring laser power

Karl here and I will keep this short for you. First I will share my experience installing an upgrade module for the Lasermaster 2 Pro, the Ortur LU2-10A. The LM2Pro came with a 5.5w laser module and this upgrade brings the power up to approximately 10w optical power. Spoiler, I am not happy with the kit. [Update (CNXSoft): The company has put us in direct contact with Ortur engineer, and they’ve promised to help us fix the issue. We’ll update the post if/once it is resolved] The Ortur LU2-10A kit comes with a very simple adapter board that appears to do two tasks. 1 is to adapt wiring, and 2, inject additional power for the higher power laser module. It looks like the board will adapt to a lot of different connection types. I followed the instructions and the first time I plugged everything in the laser came on full […]

Up2Stream HD DAC wireless audio streaming board supports Airplay 2, aptX HD (Sponsored)

Arylic has offered Up2Stream audio receiver modules for DIY wireless speakers since 2018, and their latest module, the Up2Stream HD DAC board supports modern audio features such as Qualcomm aptX HD and Apple Airplay 2. Equipped with a high-performance ESS 9038Q2M audio codec, the wireless audio streaming board delivers 1:1 high-fidelity lossless 192khz/24bits audio output, offers dual-band WiFi, a range of audio input & output ports, and supports services such as Spotify Connect & Tidal Connect making Arylic’s 4Stream app optional. Up2Stream HD DAC board specifications: Analog Audio DAC – ESS 9038Q2M Stereo RCA  output AUX input header Digital Audio Optical S/PDIF output, coaxial S/PDIF output, 1:1 up to 24bit / 192kHz Digital input header AUX input header Audio formats – FLAC, MP3, AAC/AAC+, ALAC, APE, WAV Connectivity Ethernet port Dual-band 802.11 b/g/n WiFi 4 Bluetooth 5.0 with support for aptX HD Streaming Protocols – AirPlay 2, DLNA, UPnP, Spotify […]