I had an Arduino Ethernet working as expected until today.
It has measured some voltages for a year now.
4 digital input measuring 0 or 25V with an voltage divider for each pin.
1 analog inpiut measuring 0-25V with an voltage divider.
Some weeks ago I started experimenting with 1-wire Dallas DS18B20. I connected onte sensor, coded and got it to work. The last days I have connected 3 more (total of 5) all with +5V connected to the Arduino 5V pin. The last 1-wire device (a DS2762) used as a Thermocouple interface with an K-type high temperature sensor connected. All these 1-wire-devices connected to pin 2 of my Arduino.
Today it stopped working. A quiet wisteling sound came from the Arduino as I examined it. It was also very hot at the connection to my power adapter (12V 1,2A). Also the resistors near the power connection was hot.
Have I drained to much power from the Arduino?