After looking up some info on photoresistors and finding some good info on this site http://www.societyofrobots.com/schematics_photoresistor.shtml .... i set up a voltage divider using the photoresistor and had it connected with a led ... which would light up or turn off depending how much light was getting to the photoresistor. I then thought it would be cool to connect this to my arduino and controll a servo .... similar to the set up using the potentiometer ... unfortunately didnt know how to do this so was going to post on this fourm for a how to. But decided to try harder to figure out how to do it first. Well to my amazement I managed it ....
anyway i made a video of it in action and decided to post it ... not the most exciting video but im delighted to have figured out how to do it.
It is a nice bit of assembly and programming. But, I think people might find it easier if it was a Tip rather than a forum post. You could even include a quick schematic and program to show it off.
Good idea … will look into doing that … have to learn a bit more about it first … as this reacts to light it changes dramatically throughout the day and readings programmed into it that work a one time during the day will not work later in the day when there is less light/or visa versa. (eg if i tried running it now … it would just make the servo shudder as the daylight is gone and i have the lights on.)
The set up dosent change … just the reading used.
edit / looked at it again and by changing the resistors and rereading the new readings will work … so just have to be adjusted after major light condition changes.
Also read this can be used for determining colours so will have a go at doing that sometime too
