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1  Forum 2005-2010 (read only) / Uno Punto Zero / Re: How long does a sketch last? on: December 17, 2010, 02:45:38 pm
Well, my point in sharing the opto link was that I am using this to monitor gates outside the house and doors and motion sensors. so running the wire to the board would get me lots of noise and bad readings.  So I needed a way to isolate the circuit so radio waves dont cause spurious inputs to the board.  You guys might be just reading a switch on the circuit board near the chip, but I am running my wires 200 feet sometimes. So I thought I would share the great find. Use it if you find it useful.  I have bought 4 of these boards and are using them now with another circuit and they do ship slow.  I just ordered 8 more boards today so will probably get them after the first of the year.
2  Forum 2005-2010 (read only) / Uno Punto Zero / Re: How long does a sketch last? on: December 15, 2010, 09:47:58 am
Thanks.  I plan to program it and mount it on the home automation wall.  Once there, I was hoping it would just run the sketch for a long time.  I found something you guys might be interested in. To protect the inputs I was going to use optoisolators.  I was pricing them and they were going to be pretty expensive, and then I found these:
8 channels for only $4.90.  But you have to wait about 3 weeks to get them in.  However, I have been using 3 boards for about a year and they work well.  You might have to change the resistor values or remove them like I did and use external pullup resistors, but at this price, I could not even buy the parts much less have it all made for me.  Hope someone else gets some use out of this.

Thanks again,
3  Forum 2005-2010 (read only) / Uno Punto Zero / How long does a sketch last? on: December 14, 2010, 10:10:55 pm
Once I upload a sketch to the board, how long can I expect it to stay working? I would like to use my seeeduino mega to get inputs from my house and send some sort of message to my computer. So if I program it to do this, and unplug from the compiler, how long can I expect it to run that sketch? is it burned into the eeprom or do I need to do that to make it work like that forever. . .  or will the sketch disappear if left unplugged for a few weeks?

Thanks. Didnt know how to search for this answer on Google.
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