Scott M. Baker writes: I made some wireless sensors, using BME280 temperature, humidity, and pressure sensors, together with SYN115 transmitter modules. I used these to verify the storage of vacuum sealed “PrintDry” 3D filament storage containers. See the full post on his Scott M. Baker blog. Check out the video after the break.
Run a Korg SQ-1 Sequencer from a 9V Stompbox supply: The Korg SQ-1 is a great little sequencer, and one of my favourite bits of kit for its simple hands-on feel and penchant for lucky randomness (I have 3 of them!) I tend to use it in a live setup with no computer but […]
Lukas Fässler over at Soldernerd wrote an article detailing his homemade VFD drive for his Schaublin 102 lathe. Check out the video after the break.
Robert Gawron has been working on a radioactivity detector, that is available on GitHub: There are many ways to measure radioactivity level, semiconductor detectors sense interactions between ionizing radiation and p-n junction. Because in hobbyist area most popular are Geiger-Muller based detectors (in short: not a semiconductor but lamp based devices), I think it’s a […]
Scott Baker has been working on making an Etch-a-Sketch using modern e-Paper displays and optical encoders: Above you can see my prototype. I’m using a 4.2″ e-Paper display from Gooddisplay, together with the Waveshare breakout board. I have a couple of ENS1J-B28-R00128 optical encoders that I attained on eBay. I specifically chose these encoders instead […]
Quinn Dunki wrote a great article describing the conversion process of a 1980s-era Earmark into a bluetooth headset: The obvious thing is to convert it to a bluetooth headset for modern use, right? As I previously warned, converting a 1980s-era air traffic control headset into bluetooth headphones is probably the most hipster thing possible. Normally, […]
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 […]
Kevin has been working on building his own thermostat, that is available on github: Does the world need another connected thermostat? When my thermostat went on the blink last winter, I looked at Nest, and Ecobee, and the other me-too thermostats, and I decided I would rather build my own. More details at baldwisdom.com.
Josh Levine has a nice write-up about a software only workaround for the Beagle Bone Black PHY issue: Sometimes the Ethernet port on a Beagle Bone Black does not work on power up. It takes either a physical reset button press or a power cycle to fix it. This problem affects all BBB’s and until […]
ROM emulation using an STM32F4: I remember reading dhole’s Emulating a GameBoy Cartridge with an STM32F4 some time ago thinking that it had a lot of applications with respect to old computers. In that article a STM32F4 microcontroller ‘pretends to be a ROM chip for a gameboy’. At the start of a bus cycle, […]
Dr. Scott M. Baker wrote an article detailing how he turned a Raspberry Pi into a virtual storage device for ISA bus computers: I’m tired of carrying compact flash cards and/or floppies back and forth to my XT computer. I like to do development at my desk using my modern windows PC. While I can […]
Stynus writes: Some time ago I bought a lot of Weller soldering irons at an auction for cheap. Between these where a few DSX 80 de-soldering irons. I also had an old Weller IG101 solder station (bought earlyer from another hobbyist), unfortunately I had no iron for this one and the DSX 80 could not be […]
AtPack – Atmel Pack parser, visualizer and fuse calculator from Vagrearg: Looking for an up-to-date fuse-calculator for the Atmel(*) AVR chips has been something of a long search. There are several online versions, but they have not been updated to the new chips (like the ATmega328PB). When you have got an itch, you simply scratch […]
Dr. Scott M. Baker wrote an article detailing how he converted a Seeburg 3WA wallbox into a media player for his homebuilt audio player: A bit of background. These Wallboxes were used as remotes in diners and other locations back in the 1950s. You put your nickel, dime, or quarter into the Wallbox, which racks […]
Fred writes: To be honest, my recent simple relay hack wasn’t really all that great. It just used the high power constant current output to drive a SSR. It wasn’t ideal, but it worked. I decided that it was worth the effort to track down some more useful outputs and properly detect the desired state […]
Dr. Scott M. Baker published a new build: The original reason for this project is that I wanted to build a standalone RC2014 with keyboard and display. There is an official RC2014 serial keyboard, but I find it a little inconvenient for my big fingers and poor eyesight. I have plenty of old PS/2 keyboards […]
Dastels writes, “In my last post I described how I hacked a 2Mbyte SPI flash onto a Trinket M0 to give it the memory space for CircutiPython of one of the M0 Express boards. This time I supersized an M0 Express board, specifically a Feather M0 Express, although the same hack should work on a Circuit […]
Dr. Scott Baker writes: In this video, I decided to upgrade my home built PC from AdLib sound to MIDI. I tried out a couple different midi modules, the Roland MT-32 and the Roland SC-55. I learned that I’d need an MPU-401 or compatible ISA interface, and I explored the alternatives, eventually settling on the […]
Kerry Wong wrote a post on his blog showing how he modified the 12V rail of a TL494 based ATX power supply to 14.6V for 4S LiFePO4 battery charging: To charge the 110Ah battery bank I built, I need a power supply that can provide at least 10A at 14.6V. Since I have many old […]
Steve Smith has been working on a Multiface 128 recreation project: On to the Multiface 128 recreation project. I have been attempting to find a source for an AT&Y SPEC-MATE which is a lesser known snapshot interface for the earlier Sinclair Spectrums. I used to use one back in the Spectrum’s heyday for hacking. Project […]