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a home-made 0.5 nanosecond LED flash

 
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iconoclastica



Joined: 25 Jun 2016
Posts: 228
Location: Wageningen, Gelderland

PostPosted: Tue May 21, 2019 3:35 pm    Post subject: a home-made 0.5 nanosecond LED flash Reply with quote

This diy project looks quite promising.
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Last edited by iconoclastica on Thu May 23, 2019 3:37 pm; edited 1 time in total
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rjlittlefield
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Joined: 01 Aug 2006
Posts: 20167
Location: Richland, Washington State, USA

PostPosted: Tue May 21, 2019 4:13 pm    Post subject: Reply with quote

Very nice -- thanks for the link!

(I edited the title to fix the units, which previously suggested 0.5 millisecond.)

--Rik
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iconoclastica



Joined: 25 Jun 2016
Posts: 228
Location: Wageningen, Gelderland

PostPosted: Wed May 22, 2019 6:43 am    Post subject: Reply with quote

rjlittlefield wrote:
(I edited the title to fix the units, which previously suggested 0.5 millisecond.)


Thanks. My fingers not always do what the mind tells them to do...
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apt403



Joined: 06 May 2019
Posts: 37
Location: Yelm, WA

PostPosted: Wed May 22, 2019 4:20 pm    Post subject: Reply with quote

Nice build! That's quite the enclosure - Printing the diffuser and holding it via magnets is a solid idea.

Edit: Oops.


Last edited by apt403 on Fri May 24, 2019 6:54 pm; edited 1 time in total
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mawyatt



Joined: 22 Aug 2013
Posts: 2228
Location: Clearwater

PostPosted: Wed May 22, 2019 6:55 pm    Post subject: Reply with quote

Really nice work and superb enclosure!! Wish I had a 3D printer!!!

BTW the plateau in the gate drive waveform falling edge is due to the "Miller Effect", very common problem driving high speed & current FETs (and bipolar transistors).

A given amount of gate charge must be introduced to turn the device ON, and likewise must be removed to turn the device OFF. Many switching devices have a spec on this.

Best,
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