Unknown Surface Mount Component

[EasyGoing1]

Re: Unknown Surface Mount Component

Page 4 of the AMC7135 spec sheet has the Pd calculation.

Are you wanting me to figure it out?

[budm]

Re: Unknown Surface Mount Component

Are you wanting me to figure it out?

Why not? Do you not know the Voltage source, the load current, etc.?

[EasyGoing1]

Re: Unknown Surface Mount Component

Why not? Do you not know the Voltage source, the load current, etc.?

The answer seems reasonable to me ....

[stj]

Re: Unknown Surface Mount Component

they are used in chinese lights in groups of upto 8, i'm sure there wont be a problem.

[EasyGoing1]

Re: Unknown Surface Mount Component

they are used in chinese lights in groups of upto 8, i'm sure there wont be a problem.

<sarcasm> Thanks for turning me on to aliexpress.com ... BUDDY! </sarcasm> I think I wasted about 6 hours yesterday throwing crap in my cart that I knew I would never buy but I wanted a list to narrow down ... those prices are almost too good to be true - although I realize they make up for it in long shipping times ... and being on the site is like watching old re-runs of CHIPS ... just so ... klunky and old school in the layout. But addicting none-the-less ...

[stj]

Re: Unknown Surface Mount Component

are you saying you want a link?
btw, shipping is often much faster than you think.

[stj]

Re: Unknown Surface Mount Component

https://www.aliexpress.com/item/10PC...913098686.html

[stj]

Re: Unknown Surface Mount Component

another option is to fit this to your existing board.

https://www.banggood.com/Wholesale-1...s-p-63073.html

[EasyGoing1]

Re: Unknown Surface Mount Component

https://www.aliexpress.com/item/10PC...913098686.html

I was going to get this item ...

[stj]

Re: Unknown Surface Mount Component

why 100 of them???
also, i was trying to keep cost to the minimum so as not to have it reach the cost of a new light!!

[stj]

Re: Unknown Surface Mount Component

btw,
i have these in my collection.

https://www.banggood.com/Wholesale-C...0-p-48482.html
[gonna convert this to green]

https://www.banggood.com/XANES-WT518...p-1194174.html

https://www.banggood.com/XANES-1302-...p-1202115.html

https://www.banggood.com/XANES-3506-...p-1194175.html
[lol - gonna fit a 2800ma driver in it!!]

and i'm waiting for this to arrive.
https://www.aliexpress.com/item/4200...818422476.html

[stj]

Re: Unknown Surface Mount Component

btw, i like cheap lights - gotta keep those 18650's in something!

[EasyGoing1]

Re: Unknown Surface Mount Component

why 100 of them???
also, i was trying to keep cost to the minimum so as not to have it reach the cost of a new light!!

thats a good point ... ill stick with the 10

[EasyGoing1]

Re: Unknown Surface Mount Component

btw, i like cheap lights - gotta keep those 18650's in something!

Ive never had a light that used 18650's ... I vape with my batteries but I always have a bunch laying around doin nothin ... and you can never have a flashlight that is TOO bright and always has juice!

[stj]

Re: Unknown Surface Mount Component

exacty, however - there are times when too much brightness is a problem.
that's why i'm looking at the newer drivers that can do 5%, 30%, 50%, 100% or other combinations.
the "epilepsy"strobe & SOS modes dont interest me.

what pisses me off is all the cheap lights use 20mm boards, but all the interesting drivers are 17mm.

[EasyGoing1]

Re: Unknown Surface Mount Component

exacty, however - there are times when too much brightness is a problem.
that's why i'm looking at the newer drivers that can do 5%, 30%, 50%, 100% or other combinations.
the "epilepsy"strobe & SOS modes dont interest me.

what pisses me off is all the cheap lights use 20mm boards, but all the interesting drivers are 17mm.

I had not noticed that ... sounds like a job for a 3D printer ;-)

By the way ... my order was a whopping $3.60 ... I ordered some more LEDs too ... I have no idea how they turn a profit... and strobe modes on a flashlight .... they've had them on flashlights since before I was born and in all my 48 years I have never once heard anyone say "Boy that ended up being a handy feature..." I wonder how many unnecessary clicks that feature has forced on innocent push buttons since the beginning and I wonder how that would equate to MTBF wear and tear to the point of failure ... in other words ... I wonder just how many meaningless pushbutton deaths we can attribute to that worthless annoying feature.

[sam_sam_sam]

Re: Unknown Surface Mount Component

there are times when too much brightness is a problem.
that's why i'm looking at the newer drivers that can do 5%, 30%, 50%, 100% or other combinations.

Please post your solution when you find one for this problem because I have the same problem

[stj]

Re: Unknown Surface Mount Component

Please post your solution when you find one for this problem because I have the same problem

that's easy,
the higher end drivers have programable modes.

options for current <<< select the right board!
https://www.banggood.com/Convoy-Flas...p-1088825.html

[EasyGoing1]

Re: Unknown Surface Mount Component

what pisses me off is all the cheap lights use 20mm boards, but all the interesting drivers are 17mm.

I just whipped this up on the 3D printer in about 10 minutes ... should work as an adapter ... if you want, show m the particular 17mm board you're interested in, I'll order it and I'll make an adapter that works and if you have access to a 3D printer, ill send you the file, if not, I'll print up a bunch of them and mail them to you.

[stj]

Re: Unknown Surface Mount Component

wont work, it has to be electrically conductive to carry the negative rail.
it also has to support the spring pressure against the battery.
i also doubt it's a good idea to use anything that softens if it gets hot!!


a machined aluminium ring may work, i was just going to mount the 17mm board against the 20mm one.