/diy/ - Do It Yourself

Anonymous Thu Nov 23 01:09:51 2017 No.1283554 [View]
File: 21 KB, 263x297, NSPW500BS.png [View same] [iqdb] [saucenao] [google]

>>1283344
The NSPW500BS is specified to about 3.5V at 18mA which is 14V for four in series. With a 24V supply you could drive six LEDs per branch instead of four or increase the value of R8 .. R11 to 330Ω. The current value of 2.7Ω doesn't make sense in any case.

The circuit was originally meant to stabilize the LED current over a wide range of supply voltage. If you have 24V or a bit more this is not needed. With 10V headroom a single 560Ω series resistor per branch of four LEDs would be good enough.

>>	Anonymous Fri Oct 20 19:16:56 2017 No.1263746 [View] File: 21 KB, 263x297, NSPW500BS.png [View same] [iqdb] [saucenao] [google] >>1263734 Should work. Supply could be a bit tight, LED has 3.6..4V at 20mA, typical 3.5V at 18mA. BD136 is overdone, BC327 would do. R3 should be 2K2.

Advanced search
Text to find
Subject [?]Search by post subject. Leave empty for any.
Username [?]Search for user name. Leave empty for any user name.
Tripcode [?]Search for tripcode. Leave empty for any.
Email [?]Search by email. Leave empty for any.
Filename [?]Search by image filename. Leave empty for any.
From Date [?]Enter what date to start searching from. Format is YYYY-MM-DD
To Date [?]Enter what date to start searching until. Format is YYYY-MM-DD
Image hash
Search in	All Posts OPs Only
Deleted posts	Show all posts Show only deleted posts Only show non-deleted posts
Internal posts	Show all posts Show only internal posts Show only archived posts
Order	New posts first Old posts first
Capcode	All Posts Only by Users Only by Mods Only by Admins Only by Developers
Results	Posts Threads
Action	[ Simple ]

Navigation
View posts	[+24]	[+48]	[+96]

/diy/ - Do It Yourself

Search: