Re: LEDs, drama

On 5/05/2025 3:28 am, Cursitor Doom wrote:

On Sun, 04 May 2025 06:56:23 -0700, john larkin <jl@glen--canyon.com>
wrote:
 

On Sun, 04 May 2025 12:18:12 +0100, Cursitor Doom <cd@notformail.com>
wrote:
>

On Fri, 02 May 2025 08:10:44 -0700, john larkin <jl@glen--canyon.com>
wrote:
>

>
>
One of my young engineers just got the first unit of a thing he
designed. He was all cautious about bringing it up a step at a time,
so I just pulled rank and switched it on in self-trigger mode. It
works.
>
https://www.dropbox.com/scl/fi/wl51ennrq60edw9ina3za/P800-1Hz-Selft-Trigger.mp4?rlkey=ravaj03c330jjfmplylxr2k7j&dl=0
>
It's an 8-channel high voltage pulse generator. We're not sure what
it's used for and the customer won't tell.

>
Could be for the timing capacitors in a fusion bomb. I really wouldn't
worry about it.

>
I've done timing to fire implosion fission bombs, and this doesn't
look to be one of those.

 Yes, I said *fusion* bomb which is somewhat different. Timing is
critical for those. It's rather like grasping a wet bar of soap.

"Fusion" bombs are wrapped around a fission bomb, typically an implosion device. I haven't clue what the fusible layer is - Wikipedia says lithium deutride - and a tamper layer is wrapped around that. If the tamper layer is made of uranium you get a very dirty fission-fusion-fission bomb. The only interesting timing involved is in getting the shell of explosives to go off all at once so that you get your symmetrical implosion to compress the inner core of plutonium.
The fisson bomb is different from an implosion fission bomb, but only in structure - the timing problem is exactly the same.
<snip>
--
Bill Sloman, Sydney