I just accepted a job with Asylum Research. It’s a company based in Santa Barbara, CA that makes some of the best AFM/SPM instrumentation on the planet. There are a lot of talented and nice people there that I’ve met in the past few weeks. The move from Pittsburgh has been long and hard, but I’m finally starting to get settled back into things and starting to dig back into projects that I was working on before the whole move. I brought 3 projects from Pittsburgh to tide me over while I ...| matei repair blog
Several months, ago, I stumbled across the “Smartknob” project by ScottBez1. The idea is really interesting and quite captivating for people who love interfaces. In essence, a magnetic encoder is used to sense the rotary position of a knob. However, the knob is actually a small motor- a special type called a brushless DC motor … Continue reading "SimpleFOC BLDC Motor Drivers"| matei repair blog
It’s been a while since I last posted, but I have been keeping busy! I have updates on a number of previous projects as well as announcing a few new projects. I also have started using GitHub to start uploading projects so that others can see/ use them. SNES Repro Carts This project went on … Continue reading "Project updates!"| matei repair blog
I have finally gotten around to setting up the logic analyzer I picked up locally to replace the HP 1652B. It’s a really nice instrument- 136 digital channels, LAN connectivity, keyboard and mouse support, internal mass storage, and some other nice features. Here are some notes on how I set up and used some of … Continue reading "HP 1670D notes"| matei repair blog
I made it a new year’s resolution to write on the blog more. Clearly, that hasn’t happened, but not without any success. I’m off to a good start on picking up and working on a few projects, and there are 4 drafts floating around here for future posts. So, the content should be a bit … Continue reading "Still alive!"| matei repair blog
When I lived in Pittsburgh, I got this huge 30″ Samsung monitor from Goodwill for a couple of bucks. It turned on and with no display connector attached, it runs through a color check. So, since the panel worked, I figured everything was fine and took it home. It turns out these monitors are notorious … Continue reading "Samsung Syncmaster 305t rework and cooling mod"| matei repair blog
Alright, so we’ve got the main parts for our board picked out based on the specs we want to meet. How do we hook it all up? Let’s start with the ROM. This is easier than you think! There are 21 address lines on the 27C322, A0-A20. So, intuitively, let’s hook them up in order. … Continue reading "SNES repro boards 2"| matei repair blog
A while ago, I got interested in making SNES repro boards. This was part due to the cost of genuine copies of some titles, and half in the interest of playing some of the the SMW hacks that have been released online (or maybe making my own!) I have never really built any hardware that … Continue reading "SNES repro boards"| matei repair blog
A while ago, my roomate broke his laptop. It wouldn’t charge, but it wasn’t something obvious like a busted charger or anything like that. So, I helped him move all of his important files to a new machine, but I haven’t had time to look at the old one for a while. Now that I’m … Continue reading "ASUS N550J charging issues"| matei repair blog
A few weeks ago, I fixed the issue with the protection circuit. I forgot to document the repair, so I’m going to go back later and write up what the issues were if anyone else needs to read that. Since then, it’s sounded pretty good, but recently after a while of listening (about 1-2 hours) … Continue reading "Pioneer SA-9100 noisy channel"| matei repair blog
SimpleFOC BLDC Motor Drivers| blog.mateijordache.info
I have finally gotten around to setting up the logic analyzer I picked up locally to replace the HP 1652B. It’s a really nice instrument- 136 digital channels, LAN connectivity, keyboard and mouse support, internal mass storage, and some other nice features. Here are some notes on how I set up and used some of the features- they are generally not well documented and there are some modern upgrades we can do to make working with it easier. | matei repair blog