Tag Archives: spi

New tiny parts

In the never ending quest to find a Voltage level shifter, to drive addressable LEDs, I found myself looking at these http://www.ti.com/lit/ds/symlink/sn74lvc2t45.pdf . These ICs can do 3.3V to 5V translation for 2 pins at a whooping 420Mbit and they cost $80c (USD) . So I ordered 5 from TI….

20160502_141742-1.jpg

Yep… that’s damn small. Not sure how I’m going to use those… I have no Surface Mount skills or equipment..Should have read the damn data sheet properly. Anyway, I’m glad there are 5, I will try my damn best to solder those pins to some larger pins and if i break any ill have a few extra to play with. If they work, ill be able to eliminate the Driver Pixel that i use in most of my application, most importantly ill be able to properly test higher data rates for the APA102 and the SK9822 pixel.

Next on the list are these $4 single cell Power Banks:

20160429_134048-1.jpg

These use a single 18650 to produce 5V at a maximum of 1A… With one more nice feature. They don’t have a power button. They activate simply when a load is detected. I’m using this as a test bed, and in a very non recommended way, I’m sure. I have the Output ports of all 4 into 1 Female USB port and was successfully able to power one of my latest creations:

 

Something new, something BIG!

Work has begun on a marvelous LED Installation for the Maitreya Festival. The project, titled “Space Theatre” will comprise of a huge “planet vs black hole ” diorama !

20160128_120728.jpg

Some goodies for the installation above! We are using over 2000 APA102 Pixels, driven by a Raspberry Pi A+. This installation will be built on the backbones of the same tech used int the Wow Suit.

piesap

Here they are fully built and tested! Now onto building the LED layout map…

My new Raspberry Pi A+

Its s nice little device. No bullshit set up. Easy to use Linux…WiFi was a bit difficult but that is because of Linux. Setting up the standard stuff like FTP, Apache etc.. easy! Getting NodeJS to work with MRAA…..oh lord.

//Get the latest version of node from the node web site
wget http://nodejs.org/dist/v0.10.28/node-v0.10.28-linux-arm-pi.tar.gz
//extract it
tar -xzf node-v0.10.28-linux-arm-pi.tar.gz
//set the mraa path manualy if https fails
sudo npm config set registry http://registry.npmjs.org/
//install mraa
sudo npm install mraa
//wait a long time....