Comments on: Track the sun for home lighting.

By: Sp`ange

Sp`ange — Sun, 07 Dec 2008 23:41:57 +0000

If you were gonna do this, why not go a step further and setup a hybrid lighting system like Sunlight Direct sells. Check out the links below –>>

http://www.sunlight-direct.com <<==– Companies site.

http://www.youtube.com/watch?v=hQ5MiLqb5VE <<==— clip from the Discovery channel about their products.

By: sarsface

sarsface — Sun, 07 Dec 2008 05:19:30 +0000

@someguy: yeah but then you’d have an open window lookin in and might as well just use your backyard

By: someguy

someguy — Sun, 07 Dec 2008 04:56:27 +0000

I could see this being usefull for growing a certain kind of plant.

By: steve

steve — Sun, 07 Dec 2008 02:59:00 +0000

@andy

Awesome 5th Element referance!

By: barry99705

barry99705 — Sun, 07 Dec 2008 01:16:35 +0000

@mark

Home Depot/lowes has reflective window tinting for house windows. I put some really dark tinting on my home theater windows to cut down the light. works really well.

By: MRE

MRE — Sat, 06 Dec 2008 22:10:37 +0000

I should clarify: “..when light strikes the sensor element, (be that the solar panel itself or a cds cell, depending on design), causing the unit to rotate….”

By: MRE

MRE — Sat, 06 Dec 2008 22:08:11 +0000

using a beam solar head would be quite simple. all you have to do is mount the reflector off angle from the solar cell such that when light strikes the panel dead on, and causes the motor to move such that the panel is no longer facing the sun, the reflector now is.
As all beam builders point out though, beam sun trackers are quite inefficient, pesky calibration and set of the sensors, and the daily reset would be a problem (panning the unit all the way back to the ’sunrise’ location would not be automatic)

By: Freetard

Freetard — Sat, 06 Dec 2008 20:22:34 +0000

Back in high school (20 years ago, sheesh), a friend and I built a solar tracker for PV panels. It was dead simple, using two 741 op amps and CDS cells set in 2-inch black tubes to compare light levels between the cells and adjust the array accordingly. The whole thing could be powered from a local battery charged by a tap off one of the PV panels. We only built one degree of freedom into the mounting system, since it was destined for arctic latitudes where inclination wasn’t as much of an issue. It would track the sun from sunrise to sunset, then reset to its start position when both cells went dark. I think the total parts count for the circuit was maybe 10 pieces, and cost something like $5. It wasn’t all that efficient, since we didn’t use a microcontroller, but it got the job done and didn’t mind the cold.

Our biggest regret was having not patented the thing. Meh. Open source, baby!

By: BigD145

BigD145 — Sat, 06 Dec 2008 19:43:33 +0000

Put some solar panels around the rim of the dish and you’re good to go.

By: mark

mark — Sat, 06 Dec 2008 19:06:27 +0000

@ barry99705 i have blinds, or i wund get blinded, but when the ligth comes thru the glass its in the room. and will eventualy make the room warm.

maybe next summer il just get a big mirror and stick it out side the window

By: sweetchuck

sweetchuck — Sat, 06 Dec 2008 19:02:31 +0000

I think one using weights or a winder like a grandfather clock would be better than a solar one.

By: barry99705

barry99705 — Sat, 06 Dec 2008 18:56:53 +0000

@mark

They call that invention “blinds”. ;)

By: mark

mark — Sat, 06 Dec 2008 18:46:38 +0000

I think it prefer one that is positioned to keep the sun out of my room. the toom im normaly in is west facing, so in winter afternoons its gets unbarable

By: Andy Waschick

Andy Waschick — Sat, 06 Dec 2008 18:43:04 +0000

Aziz, LIGHT!