Does the microchip grow warm?

May be you found the sketch Internal Temperature Sensor and want to know how much the chip is heating up when working.

As you can see in the video when driving four LEDs, each with a 47 Ω resistor, the chip temperature goes from 35.0° up to 36.6 ° Celsius.
Atmel allows a temperature range from -40 ° to +85 °(doc8271.pdf), so don't care about the heat.

The LEDs are connected to d8 to d11, the software is the sketch mentioned above plus some commands to set the pins, nothing you cannot do by yourself.

contact: nji(at)