Showing posts with label electronics. Show all posts
Showing posts with label electronics. Show all posts

Tuesday, January 22, 2008

Cheap Local LEDs


A local (to me) group, Dorkbot DC, had a meeting this last weekend that I wish I had know about - They built a LED CUBE project. How come I always find out about this after the fact.

A simple 3x3 LED needs 27 LEDs - there are lots of sources for LEDs on eBay, but I needed a Local source - not in the orient - with the long shipping times. I looked at
Buy Leds Online. I found them listed as a distributor from one of the China Manufactures.

But the one that I actually bought from is FCB Electronics on eBay. 100 LEDs - 25 each red, green, blue and white, and they let me order 2 packs at once for $4.50 each. Shipping wasn't bad either ~$8.00

What did the trick was that they were in the USA and shipping times would be reasonable. Plus they had a Lot of other stuff that I wanted - like 20x4 Blue LCD for under 10$ and lots of other things - this will be a test order. Their spiel is that they are in the USA and shipping times are fast. We will see. If it pans out - I'll try getting some other stuff. In the mean time I will be swimming in LEDs - hopefully soon.

Wiznet $12 Ethernet module for Microcontrollers


Wiznet currently makes a $12 module that is designed to interface with micro controllers. This blog entry has a ton of information about it and the Arduino, like daughter board for its non standard connector and such...



Wednesday, January 9, 2008

Electronics 101 hacking & Arduino

I started down the computer path by taking Electrical Engineering when computers took up rooms. I built my first 2.5 computers with a soldering iron and a lot of little parts.

So it is with fondness I see a lot of people getting down to the basics again - this time with itty bitty computers - Programmable Interface Controllers (PIC) chips. Or Micro controllers. The challenge is to get something useful done in 1k of memory - are you up to it? Some examples are at the bottom.

I ordered an Arduino from Modern Device Company and while I am waiting (breathlessly) I am amassing a lot of stuff to do with it when i get it. (shameless plug:Great Price - excellent service)

More as a list of things to do.

Electronics-Lab.com Blog
Reprogrammable LED Learns and Plays Back Light Sequences
Bristlebot: A tiny directional vibrobot
Programmable LED
Arduino AVR In System Programmer (ISP) Program a AVR tiny13 from an Arduino
MCU project everyday