Now, don’t tell me you’ve seen this one!..
A few sloppy minutes later I was de-soldering one side of a TQFP package (ARM chip), which was placed on a bed of SMD paste and slipped a bit. It was all going well, then a trace flaked off the board. Oops.
No biggie, just solder in a thin wire. 0.1 mm will do just fine. It’s commonly available in the form of transformer refuse.
I kept on soldering, listening to psytrance, minding my own business, when suddenly and for no apparent reason a 0603 resistor jumped right at me, and was gone the second after. Bad luck, it was 2 kΩ, and
I didn't have any more of those on hand I was too lazy to look for one. I did have several 1 kΩ and a pin handy, so I hooked these up in series.
After having populated most of the board, I noticed one resistor was still missing. 150 Ω, wasn’t in the kit. For demo purpose only, I decided to connect several larger-value resistors in parallel.
What I did here, as you most probably see, is stack five 1 kΩ resistors atop one another. Could have gone with six, but this is just current limiting for a LED, so the same precise value is not strictly required.
Here’s the complete board before I rub it with acetone and glue the frankensteins:
Does it work? Well, it powers up and enumerates as USB storage, so I guess it does. No way to be sure, got no toolchain.
To give some context, here’s a lamp’s-eye view.
That thing with a black/yellow handle? Unregulated 40 W noname, stock tip, China Export certified. The iron I was using. A close-up…
Why in the world?.. For fun mostly, so that I truly can.