Hi does anyone know how I can test this 555 timer
http://www.ohmslawcalculator.com/555_astable.php
I've constructed the circuit but the pint 3 output is just measuring a constant 8.8volts and I checked the current by with an ammeter from pin 3 to ground and it was hovering at 1.7.
How can I test if this circuit is working correctly?
I tried an LED through it and nothing happened. Do I need to use a limiting resistor even though the circuit alread has a high resistance? is it possible i blew the LED?
http://www.ohmslawcalculator.com/555_astable.php
I've constructed the circuit but the pint 3 output is just measuring a constant 8.8volts and I checked the current by with an ammeter from pin 3 to ground and it was hovering at 1.7.
How can I test if this circuit is working correctly?
I tried an LED through it and nothing happened. Do I need to use a limiting resistor even though the circuit alread has a high resistance? is it possible i blew the LED?