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Canon EOS 450D DC Power Supply Parts Required LP-E5 Battery pack Velleman K1823 1A PSU Maplin KC92A Plastic Enclosure 75x51x25 Maplin KU50E Heatsink Thermal Compound 12v Cigarette Lighter Plug Maplin N32FB Round 12V Rocker Switch Illuminated Red Wire Red/Black (Input) Wire Black/Black & White (Output) Build Process 1. Before assembling the Velleman power supply kit enlarge the SK1 (I had to do this as the Red/Black cable I was using was a larger diameter than the pre-drilled holes). ![]() 2. Because I'm using a small enclosure I need to lay the big capacitor over, to do this I slid some cable sleeve over the connections. ![]() 3. Complete the build of the power supply kit with the omission of the sockets as I will solder the wires directly to the board. ![]() 4. Apply some thermal compound to the heatsink and push the heatsink on the voltage regulator. ![]() ![]() 5. Drill 2 holes for the cables to enter the enclosure and a 20mm hole for the power switch in the lid. ![]() 6. Insert the power switch into the lid. ![]() 7. Solder one end of the Red/Black cable into the 12v Plug. ![]() 8. Insert the wires into the enclosure. ![]() 9. Solder the black side of the Red/Black cable into one side of SK1 and then solder a short piece of red cable to the other side of SK1. ![]() 10. Solder the Red side of the Red/Black cable and the short red cable (from SK1) to the switch. Then solder the Black/Black White cable to SK2 (Output) ![]() 11. Place the PCB in the enclosure and ensure the lid closes (Don't screw shut the lid yet!). ![]() 12. Connect the EOS DC Supply to a 12v source and turn it on, then connect a multimeter to the output cables (check the polarity) and then adjust the 'Volt Adj' to get an output as close to 7.4v as possible. ![]() ![]() 12. Open the battery case, this can be a little tricky but try not to break the case. ![]() 13. Remove the PDB and battery from the case. ![]() 14. Solder the positive and negative output wires to the back of the PCB ensuring they are the correct polarity for the PCB. ![]() 15. Reassemble the battery case, excluding the battery and test in your camera. ![]() 16. The finished power supply. ![]() END OF PROCESS
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