Category: Hardware

After playing for about one week ([url]https://blog.billy.gr/archives/2004/12/15/at89c2051-programmer/[/url]) with that i can say that i am really satisfied. I did a lot of changes till the final design. Now i must as usual create a PCB and a couple of html pages (or PDF) with the notes, parts and schematic.

Today i finished a stepper motor controller. It is a simple board made arround a AT89C2051 and 4 power transistor. I had some issues with the power supply (i need more current than it can give to me). The design is simple: 1 pin for step, 1 pin for direction. On the todo list is…

I allways wanted to make a at89c2051 programmer. The only programmers that i have is one for AVR and can program also the AT89S8252, another one for DS5000/DS2250 which i use for evalution and fast programming for the 8051. Doing a search on google a came across to the following link: [url]http://chaokhun.kmitl.ac.th/~kswichit/easy1/easy.htm[/url] The source code…

My Psion 5MX just died…. The usual problem with the lcd. Yesterday night was working without any problem. Today i opened it and i had a few horizontial lines on the lcd. The lcd cable has left us… I hope i will open it again on the weekend to see if i can fix it.…