OK, “reverse engineering” is a bit of an exaggeration here, but that was essentially the vibe when I first hooked up my mystery LCD component to an Arduino Nano. I’m not big on either Fritzing or Eagle, so I made a sketch of the wiring...
Prostar 16x16 Panel Reverse Engineering Basics I started by looking up the data sheets on the two chips found on the board - the ST2226A and the 74HC245.The 74HC245 is a standard high speed bidirectional 8 bit buffer. Datasheet is here: http://pdf1.alldatasheet.com/datasheet-pdf/view/351465/ONSEMI/74HC245.html...
Prostar 16x16 Panel Reverse Engineering - Data IN The DataIN or DIN signal is the pathway that gets the data that needs to be displayed into the panel's driver chips and thus to the LEDs. It is a serial input signal and each driver chip in the design...
Jasmine Brackett3:00 PMHello Everyone! I'm @jasmine, and I'm your Hackchat host for today. Murilo Polese3:00 PMheyo! :) Jasmine Brackett3:01 PMFor those who don't know me (as I don't hackchat too often), I run Tindie.com but used to be the community...
The seller provided the following picture but even after receiving the crystals in tubes, many questions remain.First, is it series or parallel resonance ?Then what type of cut is it ? https://en.wikipedia.org/wiki/Crystal_oscillator#Crystal_cuts has...
I uploaded a copy of the BASIC program that ran the system. The important part was this, which I annotated what it did. With this Information and finding the interface to the spectrometer is a 48 line DIO board I was able to figure out what lines did...
Disclaimer: I have never before done anything with LCDs directly There are three things that I've learned, that are essential to drive an LCD segment. For easier understanding just think of one segment with 2 pads or legs that you have access to. There's...
So I got another package in the mail today, and this little guy was inside!This was a purchase from the local eBay branch Tradera, and as you can see it suffers from a damaged display connection. Other than that, it seems to boot just fine. -'But RasmusB,...
The first part I'm attacking is the keyboard. The keyboard is the reason I want to build a "modernized" Psion, I really like this form factor! The plan is to convert it to a USB keyboard since that will work with any modern computer, but before I can...
Since the application boot sequence is hardcoded (not defined using bootcmd) we need to dive deeper into how this works. Using Ghidra I have decompiled the U-boot MIPS assembly code to understand more. I simply loaded the DRAM dump performed earlier...
Aftermarket automotive backup sensors are cheap and ubiquitous. They use transducers to produce an inaudible ping and receive the reflected response - the time it takes for the ping to return indicates how far away any potential obstacles...
This section is under construction:Now we have enough information to map out the important parts of the Input connector. We will also look at the output connector.First the input. The pinout of the input connector looks like this:InputPinout.jpg (Under...
Or as done as I'll ever be. I've got all the traces finished and the layout complete. Some things still don't make too much sense, but I won't be able to figure them out until I finish the main processor board and figure out what those connections...
So I realized something - the entire board is laid out on a 0.100" grid. Every single pin of every part (besides two connectors that have a 0.085" pitch) is on that grid. And it lines up. Knowing this, I went back to photoshop and used this to make sure...