Monday, 24 March 2014

WRT54GL SD card mod.

I have had lots of fun with the WRT54G series routers. I have installed custom firmware on every single of them. I have had at least five of these routers only 3 work at this point in time. The others have died in all kinds of ways – water, stupidity, etc.

So last summer I stumbled across this: http://www.dd-wrt.com/wiki/index.php/Linksys_WRT54G-TM_SD/MMC_mod

I thought it is the coolest thing ever. Let’s do this!

I did not have a spare SD card so I had to improvise. I dug up some old boxes and found an old floppy connector. It matched the SD card perfectly, making it the perfect adapter. And now the easy part: It was documented pretty well, so I only had to follow couple of steps. Mainly soldering the right SD card pins to the right GPIO leads.

Everything went well. Got it working. It ran a super tiny web server, because you know everything is cooler with a web server. When visiting the website it displayed the routers temperature, load and etc. It ran couple of html widgets. It doesn’t work at the time because I need the SD card.

Couple of pictures:

23022013124-1024x768 23022013126

Atari Punk Console

I just had to test out the Fritzinger magic. I only had 555 chips laying around, so with little bit of fun with google, I found this :

 

atari_punk_console_schem_556

 

 

Some information:  http://en.wikipedia.org/wiki/Atari_Punk_Console

Basically it is a super simple project. I needed something to test the Fritzing out. So I created this:

 

schem

And thanks to that, it auto created this(I had to fix couple of things):

 

 

And then of course it is etching time!

I use the laser printer method

 

IMG_6610

IMG_6611 IMG_6612

 

Iron(III)chloride in action!

IMG_6616

IMG_6619

IMG_6625

 

 

 

IMG_6627

 

Done!

2014-03-21 14.00.20

2014-03-21 14.00.09

 

You might ask why those IC’s are on the wrong side of the PCB. Answer - I rushed and forgot to mirror the print. You learn something every day! But I managed to get it working.

[audio mp3="http://kukk.tk/blog/wp-content/uploads/2014/03/Untitled.mp3"][/audio]

It is powered by USB - 5v.