Step 4: Solder on the First H-bar
Grab an extra LED from the pile and clip the shorter lead off right above the crimp. We are going to use clipped leads like this for all the connections in this project, so for now on I am going to call these clipped LED leads BARS.
This first bar is going to connect together all the LEDs in the first row. Because the bars that connect rows together go horizontally across the matrix board, I am going to call them H-bars for now on.
Flip the matrix board over and drop the the H-Bar across the top of the leads from the first row of LEDs.
Slide the soldering jig down onto the matrix board so that it is pushing the H-bar up against the leads.
Solder the 5 connections where the H-bar is touches the LED leads. The soldering jig is there to help hold the H-bar in place while you solder it. I like to solder the two ends first to tack them down, and then fill in the middle.
Notice that I also temporarily stuck a spare LED up at the top of the matrix board just to help it sit flat on the table. You want to try to get each row of LEDs as straight as possible when soldering so that the LEDs don't look all cock-eyed when you are done.
If you have the optional Ognite Vanity Flaceplate, you can put that on now to hold the LEDs perfectly straight while you solder. This makes for a impressively uniform final display that will impress your friends. (I did not use the optional faceplate for these instructions partially because I don't want my Ognite to come out so good that it makes you feel like yours is somehow inferior. It is not.)