Hi guys!
I am having problems with my first 555 LED flasher. The LED is not blinking. It just stays ON when I feed power to the circuit.
Details of the circuit:
PIN8 connected to +9V
PIN1 connected to ground
PIN2 connected by a wire to PIN 6.
Resistor R1 connected between PIN8 and PIN7
Resistor R2 connected between PIN7 and PIN6
Capacitor C connected between PIN2 and (ground)
LED protected by a 330 Ohm resistor connected between PIN3 and ground.
I tried the circuit with these configurations:
C=1000uF, R1 = 1k and R2 = 5k
C=1000uF, R1 = 5k and R2 = 1k
C=1000uF, R1 = 100Ohm and R2 = 1k
C=10uF, R1 = 1k and R2 = 5k
C=10uF, R1 = 5k and R2 = 1k
I don't think I am not wiring well the circuit. If the configuration of C,R1 and R2 should lead to a flashing LED maybe my 555 chip is dead.
Please help me to understand why my LED is not flashing. What should be the values for R1 and R2 for a 1Hz flashing LED? Does it matter for R1>R2 and vice-versa?
Thanks in advance
I am having problems with my first 555 LED flasher. The LED is not blinking. It just stays ON when I feed power to the circuit.
Details of the circuit:
PIN8 connected to +9V
PIN1 connected to ground
PIN2 connected by a wire to PIN 6.
Resistor R1 connected between PIN8 and PIN7
Resistor R2 connected between PIN7 and PIN6
Capacitor C connected between PIN2 and (ground)
LED protected by a 330 Ohm resistor connected between PIN3 and ground.
I tried the circuit with these configurations:
C=1000uF, R1 = 1k and R2 = 5k
C=1000uF, R1 = 5k and R2 = 1k
C=1000uF, R1 = 100Ohm and R2 = 1k
C=10uF, R1 = 1k and R2 = 5k
C=10uF, R1 = 5k and R2 = 1k
I don't think I am not wiring well the circuit. If the configuration of C,R1 and R2 should lead to a flashing LED maybe my 555 chip is dead.
Please help me to understand why my LED is not flashing. What should be the values for R1 and R2 for a 1Hz flashing LED? Does it matter for R1>R2 and vice-versa?
Thanks in advance