The old common standard for a mains stroboscope was a neon bulb (+resistor).
They are still widely available, simple and inexpensive.
No, they are not very bright and need some shading or otherwise reduced ambient
light, but for a tool of infrequent use...
I'd not though about the 120 hz flashes. A full wave bridge might be better.
Also, a diode, backwards across the LED would be a good idea. Stray capacitance
could put a higher voltage on the LED backword that it might not like.
A capacitive dropper could be used.
There might be an issue with the
On 11/6/24 09:21, dwight via cctalk 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.
A lot of the Chinese nightlights use capacitor droppers. I'd opt for a
green, blue or red LED rather than a
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 wrote:
> On Wed, Nov 6, 2024 at 5:21 PM dwight wrote:
> >
> > I'd think a diode, white LED and a resistor would make a good enough
> strobe.
> > Maybe 2 r
On Wed, Nov 6, 2024 at 5:21 PM dwight 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 wan
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.
Dwight
From: Tony Duell via cctalk
Sent: Wednesday, November 6, 2024 8:39 AM
To: General Discussion: On-Topic and Off-Top
On Wed, Nov 6, 2024 at 4:31 PM Mike Stein via cctalk
wrote:
>
> I use a strobe disk glued to a fridge magnet that I stick on the spindle
> motor of 5 1/4" drives to confirm the speed; the trouble is that it's
> becoming difficult these days to find lamps that emit light at 60 Hz. ;-)
I made a sim
> On Nov 6, 2024, at 8:05 AM, Mike Stein via cctalk
> wrote:
>
> I use a strobe disk glued to a fridge magnet that I stick on the spindle
> motor of 5 1/4" drives to confirm the speed; the trouble is that it's
> becoming difficult these days to find lamps that emit light at 60 Hz. ;-)
Turns
On Wed, Nov 06, 2024 at 11:05:13AM -0500, Mike Stein via cctalk wrote:
> I use a strobe disk glued to a fridge magnet that I stick on the spindle
> motor of 5 1/4" drives to confirm the speed; the trouble is that it's
> becoming difficult these days to find lamps that emit light at 60 Hz. ;-)
Thos
I use a strobe disk glued to a fridge magnet that I stick on the spindle
motor of 5 1/4" drives to confirm the speed; the trouble is that it's
becoming difficult these days to find lamps that emit light at 60 Hz. ;-)
On Sun, Nov 3, 2024 at 10:21 PM Chuck Guzis via cctalk <
cctalk@classiccmp.org> w
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