I have a power supply which outputs at 1.2A and I want to power something that uses 12V but at 500mA. I was told I could burn out my electronic item by using that power supply. Is there a simple circuit I can build to lower the amps from the powersupply from 1.2A to 500mA? Thanks in advance!

Basically, I am seeking explanations of circuit operation, schematics, and such like matters for simple camera flash systems (like, for example, the Kodak Star Focus Free camera or the Continental Tele-Flash 350T camera). I tried, for one, going to Kodak but navigating the site became cumbersome when all I need are simple circuit descriptions, parts listings, schematics, etc.). I notice the circuit(s) has (have) what appear(s) to be one bipolar transistor (number D879 3L on the Continental unit and number D879 4D on the Kodak star). Next, the systems include a small valued capacitor, a huge valued one (also, huge in size…350V, 420 uF), a small transformer, a flash (of course), a small indicator light, about three resistors (usually in the Kilohms range and rated at 5% tolerances and most are 1/4 W but one is 1/8 Watt), and some kind of "thing" that I'm uncertain what component it is (a white lead from the gas flash tube leads to it….a coil, maybe????). Anyway, any electronic experts out there that can help? Thanks in advance a bundle.
Oh, I forgot to mention that the usual units I've seen also have one diode in them. One of the samples also has an additional disc capacitor (very very tiny in size) along with the .l uF and 420 uF ones). As you can tell, however, it is basically just a fist full of components.
Oh, I want to extend my deep thanks to each answer. This helps a lot.
Oh, I want to extend my deep thanks to each answer. This helps a lot.

I WOULD LIKE TO KNOW HOW TO REMOVE GOLD PLATING FROM COMPUTER COMPONENTS & ELECTRONIC CIRCUIT BOARDS. WHERE CAN I FIND A DIAGRAM/SCHEMATICS ON BUILDING A GOLD RECOVERY UNIT.
THANKS IN ADVANCE!

……along with their circuit diagram and functioning.
please help me
link me to some websites where i can find circuit diagrams and explanations of basic electronic components

u can explain the functioning part youself here too

thanks in advance:)

My requirement is a Programmable Interface where the user side programming is graphical (drag an item from palette, connect it to other item by wire, etc) – similar to the Electronic Simulation Softwares avaiable (like electronic workbench / pspice) but this one is different in a way that it has to communicate with other computers and programmes. The user shall be able to program the operation using graphical interface and save it. and run the programme when required. Thanks in advance for the help.