I currently have a LED board with no power supply. The board has 49 LEDs in series that is then in parallel with 3 other series of the same LEDs. This makes up 196 lights in all.

Does anyone have a schematic that would drive this board; with a 120v AC input?

Thanks for any help or insight.

 

desired DC output voltage (or max sum of the forward voltage in each string)?
desired current?

 

The power needs to be 9 watts. I am uncertain the output voltage needed to run this array.

 

Sounds like 120 V AC rectified. Is there any other electronics on back of board? Any polarity markings? Color pf LEDs?

 

this topic violates tos:
http://www.allaboutcircuits.com/l_tos.html

 

How so?

 

Not if he uses an isolation transformer

 

All About Circuits does not encourage or endorse experimenting or even discussion of any circuit applications that connect directly to AC mains.
Without the use of an isolation transformer there is serious risk of physical harm and electrocution. Hence this thread will be closed should you continue this thread without the use of an isolation transformer.