Did they name this fridge after my dog…?

While shopping in Morocco, I came across a turkish brand with a rather funny name.

Maybe they are saying that they keep even their dirty parts clean, just like my dog. The real question you have to ask is: Would you pay 6899dh to get your arcelik? I’m not sure I would.

TBA6560 Driver Board

Over the break I’ve been working on a driver board for the TBA6560, this is what I’ve got so far. It’s open source, although I won’t bother posting the files until it’s a bit more substantial, and I’ve made the PCB layout.

It’s a pretty simple circuit, the only tricky parts are figuring out values for certain parts. I got a lot of help form CNCzone, where there is an entire post on this chip. One of the important issues covered was that a low esr capacitor is needed across the 35v source. Setting the frequency is also a bit of a mystery.

What’s new for 2010

I’ve spent most of the christmas break planning out a CNC setup. My initial goal is to complete the electronics set up, and then worry about making a gantry later. CNCzone.com has lots of information on everything CNC, the open source stepper drivers are of particular interest to me.

I have reviewed dozens of chips from multiple suppliers, and I have also outlined the features that I think are good to have:

– Drive bipolar steppers
– microstepping, to at least 1/8 step
– Chopper style stepper control
– Handle around 24V and 1.5A rms/3A max or more
– Cheap!
– Easy to solder
– Easy to make a PCB for

Many drivers such as the EasyStepper that Sparkfun sells, and the drivers that run the MakerBot use SMT components, which are maybe a little to much for me to take on presently.

I looked through allegro’s site, and STM, and some others- somewhere too tiny, some didn’t microstep, some couldn’t handle the power.

LumenLab switched their drivers from EasySteppers to a design based on TB8435 which looked way more… well, beefy and tough. Don’t mess, you know? Its got easy to solder leads too.  Too bad this chip is obsolete, and not made anymore.

Enter the TB6560! Its also made by toshiba like the LL one, but its still made, it looks tough, and there are some open source designs available on the web. I’m working on optimizing a design that suits me best, and then I’ll put it up here FTW!

Ground Plane

This is my first attempt at making a ground plane in eagle. Hopefully it will sort out some of the problems I was having with the first PCB I made. I have also thickened the trace that led to the right channel, as one speaker was much louder than the other.

Skateboard designs

Here are some doodles of skateboard graphics that I came up with during thermo lecutre.  I’m saving up to buy a new blank deck, and I’m going to try painting my own graphics on it. I should be able to make a stencil, as I think Queen’s has a laser cutter somewhere that I could use. If not I will just cut it by hand.

Don’t think I learnt much in this lecture…

Queen’s Homecoming featuring the big orange boombox

You can catch a glimpse of me and the boombox around 1:12. Let’s party!

TDA2009A Chip Amp

This is my first attempt at making a printed circuit board as well as making an amplifier. It came out much better than expected, and sounds great too!

The chuck barely holds the tiny bit.

My first PCB, thanks to cdx2000 for helping me design the PCB in eagle. cdx2000.blogspot.com/

Hooked up to power as well as a speaker. The resistors that are standing way off the board are only temporary as their value adjusts the gain, and they are much higher than recommended currently (Although sound quality is good). I used the boombox as a power supply.

Sometime in the future I plan to make another boombox with this chip amp (or multiples as you can bridge a few of these chips for more power) instead of using the power sucking car stereo.
For all of the arduino and POV type kits available, there does not seem to be much on the internet in terms of dead simple chip amp kits. I think that might be my endeavor.