Did i messed up my Arduino UNO ?

Hi all, I think I messed um my Arduino. Actually I don't know how. I used it as an signaloutput for a boost converter for Nixie tubes. It gave this signal to the base of a transistor. But I had only a 16R resistor infront of the transistor. The boost converter worked fine. Could this be the reason for the damage at my Arduino?

The LED at the pin #13 is shining really dark if pin 13 is high.

I have uploaded some code to test the pins with an oscilloscope:

void setup (){} void loop() { digitalWrite(13,HIGH); delayMicroseconds(100); digitalWrite(13,LOW); delayMicroseconds(100); digitalWrite(12,HIGH); delayMicroseconds(100); digitalWrite(12,LOW); delayMicroseconds(100); }

Scope settings: Both channels .2V/div .1ms/div I am using a 1:10 divider.

The voltage of pin 13 is lower tham the voltage of pin 12. Both signals are messed up.

I have tested three different microcontrollers. Always the same problem, so I think the microcontroller is OK.

What could be broken?

I hope somebody can help.

Greets MrMcChicken

void setup() {
   pinMode(13, OUTPUT);
   pinMode(12, OUTPUT);

Well this is awkward. :sweat_smile:

Thanks a lot now I get a normal Signal! :).