I have a arduino duemilanov conected to a ping))) sensor. it is wired with the three core power cable. i installed this setup at 2 places. it worked for 1 room but not for the other. Both are using the exact setup but only worked for 1 place. Could environment be a problem? anybody has encountered a same situation? Both these rooms are new premises. the room that did not worked has just been refurnished whereas the room that worked was not fully furnished.
thanks for reading.