Hello guys, i have a question about the pin 4 of the 555 timer IC. So, i tried to make a circuit with 555 timer in astable mode and also tried to use pin 4. But i notice something i can't really explain. So i used a 1k resistor for pin 4 and everything worked fine but when i switched to a 10k resistor the circuit starts running even tho the other side of the resistor was connected to ground. The question is how can i really calculate the resistance for pin 4?