tag:blogger.com,1999:blog-5509716824460860713.post4035554935971241693..comments2016-12-11T16:35:17.830+00:00Comments on Grizzly's blog: Arduino home controlGrizzlyhttp://www.blogger.com/profile/16978448497428800507noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-5509716824460860713.post-2125007350936871462012-01-19T12:15:19.367+00:002012-01-19T12:15:19.367+00:00I also have used a cheap gps module from ebay to u...I also have used a cheap gps module from ebay to use as areal time UTC clock on my arduino. my plan was to use this for switching and setting the time on other home automation kit. If you post an email address I would like to get in contactAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-5509716824460860713.post-66997758808506075902012-01-19T12:10:29.621+00:002012-01-19T12:10:29.621+00:00Hi firstly thanks for taking the time to publish y...Hi firstly thanks for taking the time to publish your projects. I also have purchaed a radio transmitter n receiver for an arduino project but haven't done anything with it yet ! On the light front you could easily monitor outside, inside or both light levels with an LDR. (light dependant resistor) Say for example you use a 20k LDR connect it in series with a 20 K resistor across your 5 volt arduino power supply. then wire an analogue input to the point where the LDR and 20k resistor join. This gives you a voltage divider circuit and you will measure light levels on your arduino. You can then scale this to 0/100% in your code. I have done exactly this with a thermistor for room temperature and use a look up table to read accurate temp in centigrade. Have a look on Ladyada site under projects thermistorAnonymousnoreply@blogger.com