FWIW: At one point in my so-called "engineering career," we were heavy
into prototyping [thru hole technologies] on the benches. We were
plagued with this problem, one or more pins unsoldered. I was in grad
school at night, and at dinner one evening, I sat across from a
psychology professor. His advice:
"You can check and re-check as much as you want. You're just going over
the same steps you went over the first time when you installed the
part[s]. You just did it [or think you did], it is basic human nature
to look right past the problem, a lot like proofreading what you've just
written. The key is to have some mechanism, separate from just looking
at the construction steps, to yield a check."
Mine became: At a "solder point" in the construction, count the number
of pins to be soldered. Preferably do it by counting each component
making a list of how many pins it actually has, and then add up the
list. As you solder, stop after each pin and mark down a "1". When you
think you're done, add up the 1's.
The key is that the check has separate steps from the steps you take
while soldering. I used this on my K2 and KX1 and had no unsoldered
components. As I said, FWIW.
73,
Fred K6DGW
- Northern California Contest Club
- CU in the 2013 Cal QSO Party 5-6 Oct 2013
- www.cqp.org
On 6/4/2013 10:33 AM, Stan AE7UT wrote:
Just finished the first part of the K2 build. Fired it up and the
LCD was not working. The end of a 2 day search was a single IC pin
not soldered.
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