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modifications
Modifications
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aucun résumé de modification
[[Fichier:ADF-ADJ-BBALIM-SOUDER-21.jpg]]
[[Fichier:ADF-ADJ-BBALIM-SOUDER-21.jpg]]
Now we will place one of the 47uF electrolytic capacitors '''C2'''
This component provides low-frequency filtration to clean up the 'high voltage' power line.
Electrolytic capacitors are '''polarized''' that means they must go in the right way or they will make your kit not work! See how one leg of the capacitor is longer? That is the positive (+) lead. Make sure that lead goes into the pad marked with a +. See the image left for details
[[Fichier:ADF-ADJ-BBALIM-SOUDER-22.jpg]]
[[Fichier:ADF-ADJ-BBALIM-SOUDER-22.jpg]]
We will finish up the 'high voltage' power supply side by placing the green indicator LED. This LED will let us know that power is working! LEDs are diodes so they are polarized. If not placed correctly they will not work! So make sure you get this right.
See how one leg of the LED is longer? That is the positive (+) lead. Make sure that lead goes into the pad marked with a +. See the image left for details
[[Fichier:ADF-ADJ-BBALIM-SOUDER-23.jpg]]
[[Fichier:ADF-ADJ-BBALIM-SOUDER-23.jpg]]
Bend the leads out so the parts sit flat against the PCB.
Solder and clip the leads.
[[Fichier:ADF-ADJ-BBALIM-SOUDER-24.jpg]]
[[Fichier:ADF-ADJ-BBALIM-SOUDER-24.jpg]]
[[Fichier:ADF-ADJ-BBALIM-SOUDER-26.jpg]]
[[Fichier:ADF-ADJ-BBALIM-SOUDER-26.jpg]]
Lets take a break and test the current progress. Take the kit out of the vise and make sure there are no stray wires kicking around that could cause the board to short.
Plug in a DC power supply, center positive. Switch the power switch to the ON position. You should see the green LED light up.
If it doesnt, check that you have a center-positive power supply, that the diode is in right, etc. You may also want to test the voltage at the V- and (-) pads near the LED to see if you are seeing a voltage there.
See my multimeter tutorial for information on how to perform these tests.
http://www.ladyada.net/learn/multimeter/
Once you've verified its all good, lets continue assembly.
[[Fichier:ADF-ADJ-BBALIM-SOUDER-27.jpg]]
[[Fichier:ADF-ADJ-BBALIM-SOUDER-27.jpg]]
Now we will solder in the heart of the kit, the MIC2941 adjustable voltage regulator. The regulator must be placed correctly to work. Make sure that the big silver tab is at the edge of the PCB (theres a thick white line on the silkscreen to indicate it)
You'll want to solder the part so it sticks up some - that way you can attach a heatsink easily - as shown.
[[Fichier:ADF-ADJ-BBALIM-SOUDER-28.jpg]]
[[Fichier:ADF-ADJ-BBALIM-SOUDER-28.jpg]]