14 Dec
2011
14 Dec
'11
4:39 p.m.
I considered
trying to build some kind of AGC for it, [...]
Perhaps an incandescent light bulb
might help out there. =) But it
requires enough current flowing in the feedback divider to
warm the bulb's filament significantly. I'd rather avoid
dissipating that much power - not to mention that I'm not sure the
op-amp I was using was capable of it.
There are some pretty low current light
bulbs (such as ones that glow
to their specified intenisty at 20ma (with 6V across them). It also
requires the bulb. I have very few incandescent bulbs [...]
And the Op-amp, nd
R's and C's, and a power supply and... If you are goign to order those, ording the ligth bulb
is not a big
problem. Of course you might have sall the other bits in your junk
box, in whcih case it is a pain having to order just one part...
Yes, I already had all the other parts.
I wouldn't, though, call my parts stock a "junk box"; that conjures up
images of a container with an unsorted mishmash of salvaged parts all
dumped in it together, and most of my parts are not salvaged scrap and
are not all jumbled together. I do have _some_ salvaged parts, but
with only a few exceptions they are kept together with any new
instances I have of the same part. And most parts are kept well
sorted, but there are some exceptions; for example, my LED stock is all
kept in the same drawer, and, except for about five values which I
bought a thousand each of which I keep in their own drawers, my
resistors are sorted by power rating (with ?W and above kept separate
from <?W), then floor(log(value)) ("third band
colour"), but not sorted
beyond that.
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