Timed lockbox


I have been reading the forums and googling for weeks but haven't found anything like a tutorial from beginning to end for a timed lockbox

Maybe if you explained what a "timed lockbox" was, someone might be able to help you.

How is such a device powered?

Search for geocache, it is just what you describe, opening when a GPS coordinate is reached, instead of a time.

Look up Real Time Clock (RTC), such as DS1307. Write a sketch to check what the date/time is. http://www.arduino.cc/playground/Main/InterfacingWithHardware scroll down to TIME. DS1307 will run for years on coincell battery, whether the house mains is lost for the arduino or not. Progam the date/time you want to wake up into EEPROM so it is available if the arduino were to restart.

How do you intend to load the wake time? Simplest way is to write independent sketch that writes fixed data in the sketch into EEPROM. Then load your longterm time checking sketch.

I had an automatic dog feeder that would go off once a day. You can look at the time code for it. http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1282104243/0#0

Time to go thru the Learning section then and try some programming/downloading.

Redwarr: I have this and I know how to hook it up http://www.sparkfun.com/products/99 I just can't understand all this Arduino coding to do what I want. Sorry but it's all greek to me lol.

I can't understand why you are wasting your time with something like this if you are not going to try simplier tasks at first. If it's all greek to you, you need to ask yourself a question; "Do I even want to understand?" I the answer is yes... well, you know where to start. ;)

Cheers, Kari

Well put GaryP aka Kari!

Arduino code is pretty simple in terms of programming micros. You just have to be willing to do some research and figure out some of the missing steps on your own. Most of the hard stuff, like the libraries to control clock chips, servos or to fire a solenoid are all written for you, you just need to tie it together.

Anyways, if you're still looking for help on this I built one almost a year back. I wrote 3 articles on it but still have to go back and sum everything up.


As I said, there's 3 articles about it at that link. The first one is more me rambling about Fritzing but there's one on how to work with the time clock (I used the DS1302) and another on how to use a servo to lock or unlock it. I went with a different locking mechanism than you did obviously. So that should get you started, but it sounds like you're looking for a hand out, in which case you should go fork out $600 for an actual timed lockbox ;)