So much better...

So, yes, the latch pin, the power pin, continuity all bad. So I clipped off an end and this time did what I should have done and tested for continuity all the way around just to know what I was dealing with and this is what I got:

The continuity reading I was getting between the latch and the 5V was not the same as what you are seeing here because what I was getting had no directionality. 

So I desoldered and resoldered what I had done for practice this time using about 120° more heat - about 610° F so I could go much faster. I had been try to use less heat to not stress the plastic, bu that had meant I was spending more time on each contact.

So the steps now:

1. If it is a circut/IC you don't know well, do you continuity readings first so you know what to compare it to.
2. Get your wires ready, both sides stripped, know what order they go in. I'VE CHANGED THEM by the way
   
3. Apply solder to each of the pads
4. Apply wires
5. Test again

And they all checked out! Since they looked a bit fragile I mummied them up with masking tape. If you do that it is always a good idea to put the piece of tape of a piece of cotton clothing first to make it less sticky.

The new config (connections the same, wire colors different)

SI  to Ardunio DigitalPin/PWM pin 9 (white wire)
DI to Ardunio DigitalPin 3 (blue wire)
CI to to Ardunio DigitalPin 4 (yellow wire)
LI to Ardunio DigitalPin 5 (green wire)

Re-compiled and ran the code...

MUCH BETTER!

See and download the full gallery on posterous

Posted via email from what2day's posterous