LDR

There have been several previous threads on this (so search CR4) and there is tons of stuff on the web.
Google solar tracker circuit, look for simple circuits.
Unless you are familiar with microcontrollers and electronics you are unlikely to to get it to work. If you were familiar with microcontrollers you probably wouldn't be asking this question.
(That's not suppoesed to sound mean... it's just true!)
Del

Ya u r right... am not familiar with microcontroller

Then get familiar!!! Read the datasheet! Don't do anything else until you understand it!

You are haveing a laugh.
You can't learn to use a microcontroller from a data sheet from scratch unless you have good electronics background already or are familiar with mirroprocessors or are a genius.
The data for a microcontroller is generally a couple of books and requires a lot of study.
I would suggest a short course on microprocessors/microcontrollers is generally required.
Del

Hi Del,

Not really having a laugh, though the OP seems somewhat of a slacker. I have been through only a couple of MC datasheets (books really) in depth, including Analog Device's ADuC7026 and Microchip's PIC18F6722 and know how much material is there. My background is in Chemical Engineering, but I have always been fascinated by electronics, perpetuated by the need to understand process control in a chemical processing environment.

That being said, without any formal instruction in microprocessor application, I think I have done pretty well developing a(n) (admittedly) rudimentary PLC including 8 analog inputs, 2 analog outputs, 8/8 digital I/O a keypad and a 20 x 2 character LCD display. Most of my knowledge of how to do this was from reading datasheets!

OK nuff sed.

I really do admire your bowmaking blogs and articles - I like working with wood too, but for musical instruments like this hammered dulcimer:

That dulcimer looks great. What woods are used in that? Maple? Must be a lot of tension across that.
Everyone else in my familly is musical except me.
Cheers
Del

The soundboard is 3.2 mm thick Sitka Spruce. The top and bottom (as you look at the picture) of the frame are red oak. The tuning blocks are pecan which I had to laminate with a resorcinol-formaldehyde glue to get a thick enough piece because I only had some <2 cm thick planks (that were given to me by a good friend). The back is 16mm thick plywood and the braces underneath the bridges are red oak. The left bridge (supporting treble notes) is pecan and the right (supporting bass notes) is red oak.

I really wish I had documented the construction of this and started a blog as I think it would have been of interest to many here on CR4. Anyways, cheers and happy bowmaking!

Good find and GA! Did you read the second topic in the .pdf: "Microprocessor Based Fibre Optic Pressure Sensor"? I haven't read it in depth, but it looks rather interesting.

If you have one axis of your tracking system pointing at the north star tracking is far simpler. You might not even need the microcontroller.

ya i am using single axis only..... what is that star tracking ? can u tell me abt that briefly?

You point your axis at the north star, and rotate it east to west at 15 degrees per hour.

You also can have a manually adjusted 22.5 degree tilt at right angles to the rotation.

If you point it at the sun in the morning and get it started, you can have a return and reset so that it returns after about 12 hours of rotation and starts again from the same spot next morning 24 hours later.

sir you are exactly right.... i am sensing the sun by using LDR sensors.... by using delay of one hr i need the ldr ckt to switch on for every one hr...then this analog voltage i/p should be given to ADC0804 then to microcontroller(AT89C51).... here i am interfacing stepper motor... i need to rotate the solar panel for 15 deg/hr as the sun moves 15 deg/hr ..... for this i need some help regarding program codes.... can u help me on this????? my block dia is .... LDR-->ADC0804-->MICROCONTOLLER-->STEPPER MOTOR