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1  Community / Bar Sport / Re: Where did you start with Micro controllers? on: December 26, 2012, 03:42:31 pm
A 4040 processor, with a whopping 1024 'bits' of static RAM. Machine language of course. Ended up building the interface to print to a KSR-15 TTY printer, mmmm.
Sad part, I still have some of that crap out in the barn.
2  Using Arduino / General Electronics / Re: Blown Caps in 0-30v 0-10a bench supply repair on: December 25, 2012, 12:39:56 pm
A little googling found this address....of the manufacturer. Email them for a schematic.

http://www.chinarek.com/
3  Community / Exhibition / Gallery / Re: arduino dual axis solar tracker on: December 25, 2012, 10:47:29 am
nice project!
Have you measured how much energy the tracking costs and how much the extra gain is?
And if you would only have one motor?


I wish I had a copy of my old program.."solar.bas" that was on many old BBS's and more than one Public Domain software CD's. My program calculated the output (in wattage) difference between panel alignment settings. The misaligment of a panel by as little as 5 degrees was significant, especially during the winter months where the solar day is short. Dig around and try to find that program, I had included all source code and permission to copy, etc.
 
4  Using Arduino / General Electronics / Re: Blown Caps in 0-30v 0-10a bench supply repair on: December 25, 2012, 08:50:45 am
Chalk it up as 'experience', and put it on the shelf. Repair it later, maybe you can get a schematic for it. "Shotgunning" parts at it can be expensive and a waste of time. The 'inrush current' of a battery, which of course happens at the speed of light, can create a lot of smoke.
5  Using Arduino / General Electronics / Cheap photo-optics, light sensors and solar cells. on: December 25, 2012, 08:36:39 am
This is not an advertisement......I was at a few 'big box' stores and saw that they had "Solar powered yard lights" on sale. It's winter and they needed the space for Christmas merchandise. One already inexpensive set was marked down by 50%.  12 solar lights for $9.  Yep, 12 solar cells, 12 Cadmium Sulfide Diodes (CDS), 24 Nickel Cadmium AA cells, for $9.  Be careful when disassembling the units, as the solar cells are as you know, brittle.  Have fun.
6  Community / Exhibition / Gallery / Re: arduino dual axis solar tracker on: December 24, 2012, 08:47:22 pm
I like your project. I wrote a "Solar" program in BASIC about 30 years ago. There is a lot of considerations as you work through this problem. Longitude and latitude of the solar site, the solar day of the year. Azimuth, and position of the sun, etc., etc. 30 years ago, it was positioning panels built of old automobile radiators to supply heat. With the availabilty of small microprocessors like the Arduino, much of the celestial math can be eliminated, and just differentiate between multiple light sensors, and logically move to the brightest as your target. Keep up the good thought process, us old guys are counting on you!
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