Hi, guys
I am building the following dimmer circuit however i am having alot of issues.
I built everything up to the optocoupler the 555 and zero crossing detector work great along with the npn transistor. I had the remove the coupling capacitor 0.001uF between zero crossing and 555 to get it to work.
https://www.onsemi.com/pub_link/Collateral/AND8011-D.PDF
The issues I am having are when trying to trigger the MOC3022. currently have an LED at the output however even without input output of MOC3022 is constantly shorted. When I attach my npn transistor with a pulsed waveform saturating at my top rail of 12V the voltage at the input of the MOC3022 drops to about 1.8V PWM.
Thanks in advance
I am building the following dimmer circuit however i am having alot of issues.
I built everything up to the optocoupler the 555 and zero crossing detector work great along with the npn transistor. I had the remove the coupling capacitor 0.001uF between zero crossing and 555 to get it to work.
https://www.onsemi.com/pub_link/Collateral/AND8011-D.PDF
The issues I am having are when trying to trigger the MOC3022. currently have an LED at the output however even without input output of MOC3022 is constantly shorted. When I attach my npn transistor with a pulsed waveform saturating at my top rail of 12V the voltage at the input of the MOC3022 drops to about 1.8V PWM.
Thanks in advance