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Category Archives: microcontrollers

Playstation controller protocol quirks

22/02/2010 – 01:29

Today I discovered why I have been having a few compatibility problems with my Playstation interface code.
The PSX uses a SPI bus. The device is supposed to put data on the bus when there is a high to low transition, then read the command on the low to high change. Sure enough the official controller [...]

By mojo | Also posted in avr, electronics | Comments (7)

Saleae Logic review

10/07/2009 – 22:01

After a lot of consideration, I decided to get a Saleae Logic logic analyser to help debug my AVR code. There are a few reviews already floating around but little detail on people’s experiences of actually using the thing, so here are mine.
The package is quite nice. You get the Logic, which is tiny, probes [...]

By mojo | Also posted in avr, electronics | Comments (0)

Retro Adapter V2 PCBs arrived!

19/05/2009 – 19:41

The first batch of PCBs is here, and looking good!

Spot the deliberate mistake :) It’s not a problem though, you can easily read the backwards text.

By mojo | Also posted in avr, electronics | Comments (0)

Retro Adapter update 11/05/09

11/05/2009 – 14:39

The circuit board designs for the Retro Adapter have been finished and sent off for manufacturing at Seeed Studio. Hopefully everything will be fine and I can then do a larger production run, and start selling kits and finished units.
This is the first PCB I have had professionally made, and the first time I’ve tried [...]

By mojo | Also posted in avr, electronics | Comments (0)

Retro Adapter V2 update

21/04/2009 – 18:43

This evening the Retro Adapter V2 site will be updated.
There are two major changes. I have abandoned the idea of using a DB25 in favour of a DB9, with a DB9-DB9 jumper box being used as the case. I managed to cram everything in to the space, with only one surface mount component (the microcontroller). [...]

By mojo | Also posted in avr, electronics | Comments (0)

Electronics projects updated

09/02/2009 – 01:02

I updated denki.world3.net with some corrections and more details on the Retro Adapter V2 and a special Sega Saturn to USB adapter I made.
More details on the Retro Adapter V2 to follow. Hopefully when I’ve finished working on the prototype I will be able to so a small run of kits. From the volume of [...]

By mojo | Also posted in avr, electronics | Comments (0)

Linear voltage control with a microcontroller

23/09/2008 – 18:51

I have been looking at ways to control computer fans with a microcontroller. I wanted to avoid using PWM because it makes fans louder and also prevents speed monitoring working properly on some fans. Linear voltage control is the best option.
The ideal method is with a nice DC-DC converter, but they are expensive and complex [...]

By mojo | Comments (0)

AVR-USB with AVR Studio

03/04/2008 – 14:55

I have been experimenting with AVR-USB recently. It has a lot more features than Igor Cesko’s code, but the downside is larger code size and the fact that it’s partly written in C which makes interfacing assembly code a bit trickier. I wanted to use it because it has good native support for HID devices, [...]

By mojo | Comments (0)
たとえ溺れても夢は夢でしかない

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