Atari 5200 Playstation 2 dual-shock controller adapter

Dr. Scott Baker has developed an adapter that allows you to use Playstation 2 analog controllers on an Atari 5200, that is available on gitHub: This adapter allows you to use a PS2 controller on an Atari 5200 gaming console. The 5200 was notable at the time for its use of analog joysticks, but the […]

Homemade Atari 5200 analog controller

Dr. Scott M. Baker made a custom controller for the Atari 5200 vintage gaming console, that is available on Github: I decided to make my own Atari 5200 analog controller, using a sparkfun thumbstick together with ADC and digital pot to do the potentiometer scaling. The controller is aesthetically a bit rough, consisting of a […]

Ultra MegaMax Dominator (UMMD) 3D printer

Mark Rehorst has a nice write-up about building his Ultra MegaMax Dominator (aka UMMD) 3D printer: Ultra MegaMax Dominator (aka UMMD) is my third 3D printer design/build.  I used much of what I learned from its predecessors, and tried a few experiments, resulting in a very high quality machine that produces very high quality prints. […]

Electric steam boiler – first steam

Quinn Dunki has a great write-up on building this homemade-from-scratch electric steam boiler: Yes, you read that title correctly. After many months of effort, this homemade-from-scratch electric steam boiler is finally going to make steam. Before we’re done, we’ll learn some sobering lessons about the dangers of live steam. Now that our boiler is pressure-tested […]

Multichannel logic probe and pulsar

Dilshan Jayakody published a new build: This is 8 channel CMOS logic probe and pulsar which is useful when designing, testing and faultfinding in digital circuits. This circuit is designed using commonly available CMOS logic ICs which including couple of 4069 hex inverters and 4040 binary counter. Logic probe of this system is based on […]

A limited attenuation high-pass filter for the KiwiSDR

KA7OEI published a new build: One of the issues common with using a broad-band, direct-sampling SDR (software-defined radio) like the KiwiSDR is that of overload by strong, low-frequency signals, such as those on the AM (mediumwave) broadcast band – but there’s another problem that should be considered as well:  The high generally-high signal levels at […]

Building a DIY SMT pick & place machine with OpenPnP

Erich Styger has a nice write-up about building a DIY pick & place machine based on OpenPnP: This article is about a project I have started back in January 2018. As for many of my projects, it took longer than anticipated.But now it is working, and the result is looking very good: a DIY automated pick and […]

3D printed stirling engine gas burner and flywheel

The 3D printed Stirling Engine with its new gas burner and heavier flywheel from Do It Yourself Gadgets: Take a look at my upgraded Stirling Engine with its new gas burner and flywheel! If you take a look at my previous post you’ll see how I built a 3D printed holder for my Stirling Engine […]

TRL measurements with homemade VNA and open source software

Henrik Forstén writes: I have been using the OSH Park’s 4 layer process a lot on my own projects. It has FR408 substrate that has better controlled permittivity and lower losses than ordinary FR-4 that other low cost PCB manufacturers use. In my opinion currently it is the best low cost process for making RF PCBs. […]