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tools
The tools I used to assemble the boards.. a temperature controlled soldering station, .020 44 rosin core solder, flux pen, solder wick, non-conductive tweezers, magnifying glasses and a working platform
Date: 01/22/2013
Views: 982
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photo-1
I first place the two dual-pin headers in place on the bottom of the board
Date: 01/22/2013
Views: 588
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photo-2
Then I take a small section of masking tape and push the pins through it to hold it to the back side of the board when I flip it over
Date: 01/22/2013
Views: 525
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photo-3
Flip over the board, and solder the pins into place. Make sure the solder flows through the holes since there isn't a lot of the pin that makes it through to the other side
Date: 01/22/2013
Views: 1282
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photo-4
Solder the pins, making sure you have a good, strong connection
Date: 01/22/2013
Views: 1180
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photo-5
Next I add the optoisolator, making sure the alignment dot is in the upper left-hand corner
Date: 01/22/2013
Views: 633
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photo-6
I then again, apply a small section of masking tape to hold it in place when I flip the board over to solder
Date: 01/22/2013
Views: 631
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photo-7
Flip the board over and solder the optoisolator in place
Date: 01/22/2013
Views: 615
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photo-8
Next comes bending and placing the resistors (not soldering yet) starting R1, the 1/4watt resistor.. I'm using a 56 ohms version instead of the 82 ohms from Marc's original parts list, for brightness
Date: 01/22/2013
Views: 1330
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photo-9
Then the R3, the 1K resistor
Date: 01/22/2013
Views: 1043
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photo-10
Followed by R2, the 100K resistor
Date: 01/22/2013
Views: 1917
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photo-11
Then the 0.22uF capacitor (it's not polarized, so the orientation doesn't matter)
Date: 01/22/2013
Views: 710
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