Hi, I just built an LED blinker circuit using a 555.
I'm using a 1uF capacitor, and 1M resistors for both Ra and Rb (aiming for about 50% duty).
It's blinking with about the desired frequency; however the LED is lighting up in "2 steps" (comes on dim at first, then goes full brightness).
I've posted a video of it here:
I'm assuming this is due to some sort of voltage ramping up on the pin3 (output) of the 555?
What do I need to do so that the led lights up "cleanly" (i.e. no partial/dim lit up period)
Thanks
I'm using a 1uF capacitor, and 1M resistors for both Ra and Rb (aiming for about 50% duty).
It's blinking with about the desired frequency; however the LED is lighting up in "2 steps" (comes on dim at first, then goes full brightness).
I've posted a video of it here:
I'm assuming this is due to some sort of voltage ramping up on the pin3 (output) of the 555?
What do I need to do so that the led lights up "cleanly" (i.e. no partial/dim lit up period)
Thanks