Running binRed test pattern firmware with new CR2032 battery with UNI-T UT61E meter in series set to Amps and logging over USB link to UT61E.exe. We see a high of 73 mA. Graph of Amps per Sample made in Libre Office No Time DC/AC Value Unit AUTO 1 13:33:16...
With the memory and I/O map looking good (see test approach in previous log), I decided to complete both MiniMax85 single board computers, expecting they would work. Well, they didn't :-( After exhausting all the usual simple debugging steps (voltages...
Flash Programmer I need a programmer for the FLASH ROM. I designed something in EasyEDA (a PCB fabrication service) but decided strip-board is more appropriate: I destroyed a RAM chip before due to careless programming (... is there really any other...
Here's my test setup: More about this below. But first, getting there was not all that easy: IRremote.h and the ESP32 IRremote.h does not want to play nice with ANY library saving anything to the NVS memory. That's sort of a letdown if you'd like to...
Matterport is a camera that can automate the process of high resolution reality capturing. The Matterport is reasonably priced with the 3D cameras costing $4500 and a monthly/yearly cloud processing fee. I think that the speed and quality of the system...
Having picked a crazy overkill instruction set, it's easy to see how those functions map out in an ALU. 2 registers; an adder; and four logic functions. I spent some time over the weekend thinking about how this maps out to a final design, and in particular...
One of the bigger challenges recently has been devising a way to capture output from the camera efficiently without relying on the DCMI interface available in other STM32 devices. One of my goals from the beginning was to avoid resorting to BGA or extremely...
The first 5 chips of the GPU were added this weekend. This included the H register (4-bit counters and buffer) and the V and S registers (8-bit flip-flops). Most of the time was taken up with software development for a video timing loop. The end result...
Edwin Hwu12:15 PMThe encoder costs around 150 Euro including the scale..... Mark J Hughes12:15 PMAffordable to some - not so affordable to others. Mark J Hughes12:15 PM(See y'all -- I'll have to read the rest in the transcripts) Edwin Hwu12:15 PMyeah.....more...
** Very Confused Point **I have removed the PIO, Zilinx z80, Toshiba z80, toshibas ROM, Postprocessor CPU/RAM/coprocessor, the 8051 AND the disk board is not plugged in. THERE ARE NO MORE PROCESSORS IN THIS THING. WHY DOES IT STILL WORK?!All the...
Things have been moving along a bit slow on this project of late but some progress has been made this week on the circuit design. Primarily this is a NodeMCU board with a bunch of IO associated with it. Normally I would have just copied and pasted...
An Integer Version of the DemodulatorAs the code will be ported to a lowly Arduino using C code, I first looked at if I could use 16 bit signed integers. The answer is strictly yes. Strictly in that the 32 bit result of a 16 bit multiplication is not...
Potential circuit board to read AC mains voltage. F1 - 1/8A Pico-Fuse, R1 - 1M, R2 - 1k, U1 - AD629.I think that it would work to remove the bimetal in a breaker and replace it with this board. It would no longer be a breaker, but rather...
Today I finished the schematic of the main computer board (the first version, I guess...). You can find it in the file section, and the most important parts will be discussed here. SYSTEM INPUTS AND OUTPUTS The 24 system outputs can be directly...
The CAM M8Q is the heart of the Asset Tracker and what a great GNSS engine it is. Even though I am using the minimum recommended pcb board dimensions the chip antenna on the CAM M8Q is really superb. I have been able to track cars around town with little...