21
Jan 2010
Weather Clock Schematic
Thu, 01/21/2010 - 00:39 — Sean CarneyI've had several people ask for a schematic for the weather clock so I've created a rough one showing how it is wired. (Click images to enlarge)
As I've said before, this really isn't anything difficult or complicated from the wiring point of view. The Ethernet Shield requires no additional wiring, it just needs to be plugged in. The servos and capacitor are easy to assemble. I choose to solder the capacitors and servo terminals together on a prototyping board, but if you were creative you could probably just build everything right off of the headers.
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Comments
Hey Sean, Love the clock.
Hey Sean, Love the clock. Tried to make my own because I kinda want to get into some more hardware stuff, normally I'm just www stuff. Got a question for you though. I build the circuit you had up and tried to get it to work. It will give me a could of responces and update to the temp and stuff then the serial will come back with crap like this: 60.00
heavy rain
ReconnectedHTTP/1.1 200 OK
Date: Fri, 12 Feb 2010 02:24:44 GMT
Server: Apache
idea what that is? It stops updating after that. I put in a cap but I couldn't find the exact on you had. mine is a 16v 10uf. any help you be great.
It sounds like you are
It sounds like you are running out of RAM. A power failure usually causes the Arduino to reboot, but it doesn't cause random characters to be printed or hang the Arduino. To test this try running the sketch without the motor or capacitor attached - just use the Arduino and Ethernet shield.
Remember that an Arduino only has 2KB of RAM and older models only have 1KB. Some string libraries also have memory leaks that might need to be patched. To limit the RAM usage keep your strings as short as possible and trim your numeric variables. Use int8_t (8 bit signed integer) instead of int (16 bit signed integer) wherever you can.
Code to check how much memory is free can be found at http://www.arduino.cc/playground/Code/AvailableMemory
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