WattsUp: Tooling, Distracting, Boxing


After a break for “real life” (Hockey, helping at the Firemans’ run, a night of couch-potato), it’s time to get back on the RetroChallenge horse.

Tooling:
Tadaaaaa!20150109_083408 The “Molex” crimp tool I needed has arrived.

Actually, due to a mix-up, I now have two such crimp tools. Oh well, I’ll donate one to work, I’m sure they will need one for something, someday.

Distracting:
I also decided to obtain some LEDs for electronic experimentation, and found something interesting: Avago HLMP-1600-D00A2 LEDs – that have a built-in current-limiting resistor. Handy!resistive_LEDsUnfortunately, these come with even-length leads (unlike the traditional long-cathode/short-anode leads), and no markings to indicate which lead is the cathode; so which way should these be wired-up?

As it happens, one quick and low-tech way to find out involves the use of a pair of crimp-tools, three AAA batteries and some black sticky tape:20150109_105056It turns out that when viewed from the back (pin-exit-side with the leads facing down), the right-hand pin is the cathode. Thank goodness we got *that* sorted out…

Actually, there is another irritant with these LEDs – the datasheet quotes a reverse-bias breakdown voltage of 5V, but doesn’t make it clear whether that is after allowing for the internal resistor (I presume so) or not. Oh well.

Boxing:
Because the new NV1 power-supply is a “naked” unit – bare PCB with no outer case/enclosure – some way of boxing it up for mounting in a drive-bay is needed for this project. Which is why I obtained a couple of 3.5″ disk-mounting side-brackets for a no-name storage-array:20150106_175306Of course, I don’t need the brackets – rather it’s the temporary plastic shipping-filler I’m after! The filler is a little shorter than a regular 3.5″ disk-drive, which gives me room to add the necessary external PSU fan at one end. Two of those fillers, one upwards and one downwards, makes the enclosure.

Actually, a degree of carving and trimming is needed, they are just a tad too tall, and not *quite* long enough. To fix the latter issue, removing the rounded corners does the trick.
20150110_002035

Wrapup:

“Now put that goddamn keyboard down and get back to some crimping!”

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