Re: RE: Re: RE: Re: For those who believe in electricity

On 4/7/2025 1:40 PM, cyclintom wrote:

On Mon Apr 7 13:09:45 2025 Zen Cycle  wrote:

On 4/7/2025 1:01 PM, cyclintom wrote:

On Mon Apr 7 08:56:02 2025 sms  wrote:

On 4/7/2025 8:16 AM, Zen Cycle wrote:

On 4/6/2025 10:22 PM, Frank Krygowski wrote:

>
<snip>
>
A battery puts out DC, it does not provide "half of a sine wave."
>
An LED dynamo light would be rectifying the AC into DC, though there are
ways around this if the light has multiple LEDs (two LEDs each
conducting for half the cycle). If there is only a single LED it can
still be powered by the AC from the dynamo but it would be wasteful as
it would only be lit for half the cycle.
>
For an inexpensive LED light I wouldn't spend too much time trying to
repair it. If it were a high-end, LED light then that would be a
different story.
>
I also have a cheap dynamo light on one bike, the Planet Bike Blaze
dynamo, the only dynamo light that I'm aware of that has a flash mode.
It has a switch that I never use, it's always on flash mode, and it's
powered by a hub dynamo. At night I have a more powerful light of course.

>
>
>
>
Stop trying to explain things to someone who doesn't have the concepts. The Problem wikth simply using two reversed LED's is that dynamos increase their ACV with speed. if you simply cut the tops off of the waves if they havemore than the forwaed bias most of the time. But that throws away a lot of energy. And the chopper would have to be able to get rid of a lot of heat. I can think of some nice ways to increase performance but Frank is in no position to design PC boards. And Flunky thinks that wave sooldering leaves voids so he is so far out of it that it proves my previous impressions.

>
And, As usual....
https://www.mclpcb.com/blog/solder-joint/
>
And yes, that article is about voids in surface mount reflow systems.
>
Besides that, you dumbass, I didn't mention voids. I mentioned cold
solder - different than a void. That you obviously don't know the
difference speaks even more to your overall ineptitude.
>

>
One of the reasons I was worth so much money was because I knew every step of manufacturing and could not only design and progam but analyze every procedure from assembly to end product and even packaging and shipping.

>
And yet you never had to deal with the FDA when designing medical
equipment....lol

    I never had to deal with the FDA because it wasn't necesary for a machine, not being a food or a drug.

And as usual
https://www.fda.gov/news-events/approvals-fda-regulated-products
"Medical Devices
Instruments or products used for treating or diagnosing disease (such as thermometers, artificial hearts, and home pregnancy test kits)"
Also:
https://www.ecfr.gov/current/title-21/chapter-I/subchapter-H/
Title 21 - Food and Drugs
 > Chapter I Food and Drug Administration, Department of Health and Human Services 1 – 1299
 >> Subchapter H Medical Devices 800 – 898

While heart regulators are required to meet FDA standards - lawyers delt with tyhat.

Lawyers rarely get involved in regulatory issues unless there's an issue that can't be resolved between the design and regulatory principals. Any device (especially having to do with monitoring or controlling the heart) that the FDA approves must meet _design_ criteria. Lawyers don't do that, dumbass.

But explain why a rectal thermometer - your favorite toy -

only in your dreams

would need FDA approval beyond the initial calibration of the production equipment?

Which is more proof you were never involved in the design of any medical electronics.
https://www.fda.gov/media/116573/download
"The guidance applies to the design of medical devices as well as the design of the associated manufacturing processes. The guidance is applicable to new designs as well as modifications or improvements to existing device designs. The guidance discusses subjects in the order in which they appear in FDA's Quality System regulation and is cross-referenced to International Organization for Standards (ISO) 9001:1994, Quality Systems Model for Quality Assurance in Design, Development, Production, Installation, and Servicing, and the ISO draft international standard ISO/DIS 13485, Quality Systems¾Medical Devices¾Particular Requirements for the Application of ISO 9001."
--
Add xx to reply