Oscilloscope shows reaction, but LED does not blink

Quote from misax on May 13, 2025, 12:34 pmhello;
I put a simple blink sketch to a bare atmega328 but the LED does not blink. the oscilloscope at this pin shows that there is an alternate 5v / 0v every second but when I change the oscilloscope with a LED ist dos not blink. I use 220 Ohm resistor and tried the LED in both directions. I also use the ground 0V symbol at the other side of the LED. What ist my mistake ?
hello;
I put a simple blink sketch to a bare atmega328 but the LED does not blink. the oscilloscope at this pin shows that there is an alternate 5v / 0v every second but when I change the oscilloscope with a LED ist dos not blink. I use 220 Ohm resistor and tried the LED in both directions. I also use the ground 0V symbol at the other side of the LED. What ist my mistake ?


Quote from misax on May 14, 2025, 6:58 amwhen I put an oscilloscope at B2 it shows toggling 5 Volt every second but with LED ist does not work
void setup() {
pinMode(10, OUTPUT);
}void loop() {
digitalWrite(10, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(10, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}
when I put an oscilloscope at B2 it shows toggling 5 Volt every second but with LED ist does not work
void setup() {
pinMode(10, OUTPUT);
}
void loop() {
digitalWrite(10, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(10, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}
