Hey folks I need some circuit design help. It'll boil down to adding some resistors to a circuit but I need help with getting the right wattage.
I recently put together a power supply using this schematic:
http://www.plitron.com/pages/technote.htm
See the "Full Wave Bridge"
I went about the design process using this terrific tutorial:
http://nilno.com/laser_dir/power_supply_design.pdf
which was written by this guy:
http://www.campbelldesigns.com/
And in case you dont have enough pictures in your life here's my power supply: http://nilno.com/laser_dir/blogger.html
Okay, the problem is the following, the power supply voltage is too high. The plitron site gave a formula for the voltage which was supposed to be 65vdc, but its running at 80vdc. I called the plitron tech people and they said if should go down a bit if I put a load on it but said not to expect it to go down to 65volts. He said I should put a resistor on the output of the transformer.
So what I'm asking for is some help figuring out the wattage and resistance of the resistor that needs to go between the secondary and the bridge diode. Any takers?
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Owen