O.k., I'll admit it. I know less than I thought I did and am not too proud to display my stupidity. I keep getting parts arriving in the mail and end up saying... huh?? I've currently got two dumb questions as it pertains to power supplies. (More stupid questions will be revealed as we get into flexmods, scanners and DZ's colorboard!)
1) I got a benchtop style power supply (photo below). I was always under the impression that, with something like this, you turned the voltage knob up to adjust the voltage and then adjusted the current knob in order to adjust the mA going to a particular device that you had connected. I assumed I could set the voltage to say, 5 volts and then, turn up the current knob to say, 500mA for the puposes of testing and measuring the output of a diode harvested from sleds. Then, perhaps adjust it to 550mA and re-check. Well.... it's strange. Apparently it doesn't quite work like that.
One member said I need to adjust the voltage, then "short it out" (whatever that means - I guess connect the positive and negative leads together) then adjust the current reading to a point you want to test, and then turn off the power supply. Then, connect the diode and flip the supply back on. I guess I'm just not clear on how you stick a diode into a O-Like housing, attach some leads and then apply power to check it.
2) Since a benchtop supply is obviously not what's used in a projector and it was suggested I buy 5 volt DC power supplies, I order four of the supplies in the picture that, again, hopefully appears below. With there being five wires, and a pot, I'm just not certain what gets hooked up to what. I'm guessing the red and black are going to be my AC current in from the wall. Then the white and black probably go to the laser driver. Not sure about the green and yellow wire though.
I'd really like to not fry any expensive parts or myself in the process.