Good news Everybody!The next iteration of the Polymerase Chain Reactor v0.2 works! Not only that, it works really well, with very good amplification of DNA in just 1 hour (thats actually faster than professional machines!)First, here is the results...
How do we get the analog signals from the respiratory pressure sensor and the 8 expressive buttons via the network to a software synthesizer? We need a MCU and PHY, right? We will use one of our designs we already have at hands from an other project:...
Well lights up day was meant to be Sunday, but we decided to start finishing the drywall on the garage which is my home shop, so that took three days of the holiday, krs had to do her sisters bridal shower event as well, so all in all a very busy thanksgiving....
I have made some progress on the keyboard controller since the last log entry.As we learned last time, our USB keyboard will need to send a specific scancode for each button pressed. All other logic (interpreting the keypresses) is done on the computer...
After a successful first deployment it's time to work on the battery life. I already had some ideas for how to reduce the power usage, so time to start working on them:Turn the Sim800l off and keep it offHibernate the Teeny 3.0 instead of just delay()Reduce...
Horray the new 4 layer board is here from www.pcbway.com and I made tons of fixes :) + its got gold contacts !!! oooooohhhh :) The quality of this board looks awsome. I checked the upgrade for free box if available and got what looks like...
a snippet from a log at #sdramThingZero - 133MS/s 32-bit Logic Analyzer...Wherein, I've ordered a Raspberry Pi Zero, and realized I don't actually have a functional display with an HDMI/DVI input...As you may recall from the previous log-entries at this...
#sdramThing4.5 "Logic Analyzer" has quite a bit of info regarding the core concepts of what I've coined "Free-Running" SDRAM... The basic idea is to connect the SDRAM's command/address pins directly to (some of) its data pins. Doing-so, then, allows...
So I finally had a chance to assemble a Megsy based on the PCBs I had manufactured by PCBway. The PCB was designed to be assembled as a sort of "poor man's BGA (ball grid array)" where you would place one board directly ontop of the other with solder...
So from the public's POV, you saw this on our Twitter feed. We decided to get the hype train going a little early and threw a game together to give the l337 H@x0r community of DEFCON something to do over the holiday break. BEFORE READING ANY FURTHER,...
Thankfully, there isn't going to be a series of exhausting logs on the choice behind every component on the BoM. I just wanted to highlight how the system design has begun to create some freedoms and perhaps constraints on component selection. Hopefully...
Front PanelI added an 8 bit front panel to the schematic:The Front Panel maps 128 bytes of PROM, 120 bytes of RAM and 8 bytes of IO. So I thought I better do the Monitor Program before I went any further as the PROM for the Weird CPU was only just enough.The...
A Void in The Market One might think the hardware prototyping scene is quite saturated and does not accommodate new platforms. Yes and no. There's definitely a large number of platforms and options out there-which is a good thing because it enables people...
The new revision PCBs and new inductors came in late last week. For comparison sake, I replaced the 100uH inductor with a 33uH inductor on the rev 1 PCB. The AL8861 data sheet lists 100uH as a legal inductor value, and I wanted to keep the operating...
2022-11-26 Fitted copies of PAL chips from Steve's board.Assembled code reverse engineered from Steve's board, and modified for an FDC with a non-inverted data bus. Missing chips: IC 9 = 74LS123 replaced with 74HC123.IC 13 = 74LS273 which I don't have...