Posted: Thu Apr 04, 2013 11:31 pm
After some circuit help from Steve i have this circuit posted here now helping to control my video levels theres also a 100k pot across the diode not shown but after testing looks like i will need a higher value variable resistor the adjustment it to tight at the moment .
I am still finding at higher laser levels if i push it what i think is the corona of the laser is causing the image to be blurred as the drum is picking to much of the uv light up other than raster line .
I may need a mask perhaps .
Heres the laser circuit after Steves circuit i more than likly just need the 10k pot as a fixed lower value resistor the large value pot over the lm311 still seems useful Also the + 5 volt rails should be 12 volt in my drawing.
I am still finding at higher laser levels if i push it what i think is the corona of the laser is causing the image to be blurred as the drum is picking to much of the uv light up other than raster line .
I may need a mask perhaps .
Heres the laser circuit after Steves circuit i more than likly just need the 10k pot as a fixed lower value resistor the large value pot over the lm311 still seems useful Also the + 5 volt rails should be 12 volt in my drawing.