6 Nov
2024
6 Nov
'24
10:10 a.m.
I keep an oldskool fluorescent desk lamp around for that reason; also makes
a handy desk lamp ;-)
On Wed, Nov 6, 2024 at 12:59 PM Tony Duell <ard.p850ug1(a)gmail.com> wrote:
On Wed, Nov 6, 2024 at 5:21 PM dwight
<dkelvey(a)hotmail.com> wrote:
I'd think a diode, white LED and a resistor would make a good enough
strobe.
Maybe 2 resistors to isolate the AC lines enough
a little better.
Quite likely. Actually the traditional mains lamp stroboscope flashes
twice per cycle, so you might want 2 white LEDs in inverse parallel.
I wanted something that I could run off a DC supply and which could
handle '60Hz' markings in the UK. I have at least one device with a
set of black and white bars for 60Hz mains but not for 50Hz.
Another advantage is the fact that the LEDs are only on for 1/16th of
the time gives a very clear pattern. The bars look sharp and you can
easily see if they are jitterng about due to bad bearings, drive belt
issues, etc.
-tony