Peter Scargill has a nice write-up about a powerful timing node for Node-Red, the Big timer: Big Timer is (probably) the best-ever timing node for Node-Red, providing a general purpose timer as well as handling summer/winter correctly as well as (importantly) lighting up time (for which you should provide longitude and latitude). After all you […]
Category Archives: project logs
Revisiting the DSETA board with an AT89C51ED2
An update on Jesus Echavarria’s DSETA board we covered previously: Some months ago I review the DSETA board due the obsolescence of the microcontroller. I use this board in some projects succesfully. But when I try to manufacture a batch of this boards, I found that the microcontroller (AT89C51RE2) was obsolete. So, the board needs […]
Process Automation: Relays and triacs
Andy Brown designed and built this relays and triacs controller board that he could use to automate his homebrewing process: The heaters, fridge and fans that control the temperature in my brew fridge need to be switched on and off and that’s what this board is designed to achieve. As you can see from the diagram […]
UniSolder 5.2
zed65 posted picture of his UniSolder 5.2 build designed by Sparkybg: Ok, first of all thanks sparky for a great project! I’ve now finished the project and it finally works. Thought I would share some of my experience when building this. Via the project log forum.
LED traffic light
Domen Ipavec shared his DIY LED traffic light in the project log forum: Traffic lights are all around us, and they seem simple enough but are they really? Real traffic lights can be a very complicated system because it requires sophisticated control and coordination for smooth and safe traffic. The traffic light I made is […]
Temperature alarm for boiling milk
Domen Ipavec shares his temperature alarm for boiling milk in the project log forum: Anyone who has ever boiled milk on the stove knows, that it has a nasty habit of overflowing. That is why I created the temperature alarm for boiling milk to be used my mother. The temperature alarm uses attiny841 microcontroller and […]
RC boat with NRF24L01+ and Arduino
Markus Gritsch writes: I and my little son built a small electric boat from a kit. However, the kit only offered turning on the motor with a switch, and let the boat cruise wherever fortune it may take. I thought why not improve it a bit by adding some RC capability. I had some left […]
Project curve tracer
Jason Jones has been working on a curve tracer project: As the hardware is at the point of initial release, but the firmware and GUI aren’t quite there yet, I decided that it would be prudent to split off the firmware and GUI components into their own GIT repositories. Tracking all files in the […]
110v temperature controlled soldering station build no. 2
Mike Doughty from PCB Smoke shared his DIY 110v temperature controlled soldering station in the project log forum: This project is build number 2 of a 110v temperature controlled soldering station. It is a follow-up post to the project that I was working on last October. Blog post with complete details here. This version has […]
UCload: revisited
Sjaak has posted an update on his uC controlled dummy load project we covered previously: I finally found some time to check out the UCload project. A couple of weeks ago I quickly soldered the PCB and wrote a quick’n’dirty firmware for it. The basic functionality was working, but it wouldn’t do good for the […]
Therm RTD
Matthew Reed writes: Therm RTD is an addition to the Therm PID Controller family, with support for RTD temperature sensors. RTDs (or Resistance Temperature Detectors) use a coil of fine wire made from a material (usually platinum, copper or nickel) that has a very predictable temperature coefficient of resistance (or change in resistance as temperature changes). […]
ESP8266 wireless SID project
bl4rk shares his ESP8266 wireless SID in the project log forum: I’ve been trying to start a SID project for about 5 years now. Back then I wanted to use a 6502 along with a CPLD and other ‘real’ hardware… while I might still do something like that (or even try to use an FPGA for everything […]
R-Kade Zero project
TonyD shares his latest DirtyPCB project in the project log forum: the R-Kade Zero, a tiny video gaming system It’s basically a interchangeable mini gaming controller board for the RPi Zero. Being interchangeable it gives the player a choice for their favourite style of play. You can visit his Kickstart page for more info.
Unisolder 5.2
In this video Dumitruv demonstrates his Unisolder 5.2 designed by Sparkybg: First part is the calibration with a precise 10 Ohm resistor then I plug the iron and you can see the temperature stabilizing after quite awhile. Once it stabilizes I touch the wet sponge and it goes out of whack again. Via the project […]
Monitoring woodstove temperature with a MAX31855 Quad Thermocouple BoosterPack
Spirilis over at the 43oh forum writes: This was a project begun last winter in the hopes of having an array of thermocouples to monitor my old woodstove when operating it. Well, I never got around to finishing it, but I have a fancy new woodstove as of this fall, and I would love to monitor its […]
DIY USB volume knob
Markus Gritsch made a nice USB volume control knob for his computer: After having been inspired by this Instructable [1] I also wanted to make a nice looking volume knob to attach to my computer. It uses the TrinketHidCombo library [2], but on a Digispark board, to have one more I/O pin which I use […]
Over the top UCload
Sjaak has published a new build, uC controlled dummy load: I’m mostly a digital guy, but I’m wanting to design my own power supply. If I’m wanting to test that i need a dummy load. I got inspired by the re:load (www.arachnidlabs.com/reload ). I added a microcontroller, rotary switch, external powersupply input and the obligatory […]
Arduino Zero using a xQFP80 +50 Protoboard
Tom Keddie shared his Zero project using a xQFP80 +50 Protoboard: I need more processing power than an AVR for an upcoming project so I ordered an Arduino Zero to take a look at the SAMD ARM processors. Unfortunately my son coveted the box it came in, once the two were separated the Zero was […]
Mini version of the OSI-300 trainer
Here’s Christopher’s mini version of the OSI-300, he wrote a post on his blog detailing its assembly: The OSI Model 300 Computer Trainer was advertised by Ohio Scientific Instruments in 1976 as a computer designed to introduce individuals to computers and teach them the basics of programming the MOS 6502 processor. The original trainer consists […]
PIC24 bedside table alarm clock
Markus Gritsch posted pictures of his PIC24 bedside table alarm clock in the project log forum: Another year, another clock, but for the first time for my alarm clocks, I am not using an MSP430 but a PIC24 instead. During the development process, I came across some interesting discussions about betting sites not on BetStop, which led me […]