LED lamp innards

LED lamp innards

This topic has 1 reply, 1 voice, and was last updated 18 October 2020 at 15:32 by Roger Hart.

Viewing 2 posts - 1 through 2 (of 2 total)

Author

Posts
18 October 2020 at 15:32 #502023
Roger Hart
Participant
@rogerhart88496
Had trouble with 20W led bench lamp flickering, been that way a long time, finally swapped lamp and chopped open the offending item. Cut away the grey goop potting stuff and…

Inside is a typical power supply based around a BD3216 chip. A close look shows the mains fuse ended in a dry joint with a black burn mark. Also L3 the buck inductor is missing, it came away with the potting – it too seemed a bit cooked. The mucky soldering on the led assembly is original.

From a quick trace of the circuit the transformer is part of the Vcc power supply and feedback loop.

Now to think of a use for it…
Advert

18 October 2020 at 15:32 #32146
Roger Hart
Participant
@rogerhart88496
Author

Posts

Viewing 2 posts - 1 through 2 (of 2 total)

Please log in to reply to this topic. Registering is free and easy using the links on the menu at the top of this page.

Code of Conduct

Latest Replies

Viewing 25 topics - 1 through 25 (of 25 total)

- Topic
- Voices
- Posts
- Last Post
- Linear encoders
  Started by: Speedy Builder5 in: Electronics in the Workshop
- 7
- 10
- 17 June 2026 at 00:32
  duncan webster 1
- Green Dragon Sustainable Fuel
  Started by: Neil Wyatt in: Locomotives
- 9
- 12
- 16 June 2026 at 23:17
  howardb
- ML7 – Zeroing the Topslide? 1 2
  Started by: Dr_GMJN in: Workshop Techniques
- 21
- 35
- 16 June 2026 at 22:18
  ega
- Orbital – Not your Usual Oscillator!
  Started by: JasonB in: Stationary engines
- 11
- 17
- 16 June 2026 at 21:38
  Andrew Crow
- AJ Reeves 5 inch driving trolley bogies
  Started by: Ian R in: Locomotives
- 3
- 6
- 16 June 2026 at 21:28
  paul rushmer
- How Good Are 3D Printers? 1 2
  Started by: Neil Wyatt in: 3D Printers and 3D Printing
- 14
- 26
- 16 June 2026 at 20:56
  Mark Rand
- upgrade of Alibre Atom 3D
  Started by: David George 1 in: CAD – Technical drawing & design
- 4
- 5
- 16 June 2026 at 19:31
  David Jupp
- Greetings
  Started by: dee in: Introduce Yourself – New members start here!
- 1
- 1
- 16 June 2026 at 16:53
  dee
- Warco DNC18 Mill/Digital Dream controllers
  Started by: Pippin in: CNC machines, Home builds, Conversions, ELS, automation, software, etc tools
- 9
- 18
- 16 June 2026 at 15:44
  Derek cottiss
- My adventures with a bench top CNC mill 1 2 3
  Started by: John Hinkley in: CNC machines, Home builds, Conversions, ELS, automation, software, etc tools
- 8
- 68
- 16 June 2026 at 12:10
  John Hinkley
- Steam Engine
  Started by: steven49 in: Introduce Yourself – New members start here!
- 1
- 1
- 16 June 2026 at 09:35
  steven49
- Lathe cutting aggressive taper
  Started by: Lee Kennedy in: Manual machine tools
- 11
- 13
- 16 June 2026 at 08:09
  Nicholas Farr
- KMO RETROL 1/4 Scale Lister D Engine with some Mods.
  Started by: Blue Heeler in: I/C Engines
- 2
- 4
- 16 June 2026 at 04:46
  Blue Heeler
- Axle pin question – choice of material and possible need for case hardening?
  Started by: barryblundell in: Materials
- 5
- 9
- 15 June 2026 at 22:19
  barryblundell
- Wallace valvegear simulator
  Started by: Kevan Shaw in: General Questions
- 7
- 24
- 15 June 2026 at 19:29
  John Purdy
- Replacement Allbrit Draftmaster Protractor Rulers
  Started by: wigan2026 in: Workshop Tools and Tooling
- 7
- 14
- 15 June 2026 at 18:06
  Grindstone Cowboy
- Commercial ads in classified
  Started by: Andrew Tinsley in: General Questions
- 2
- 2
- 15 June 2026 at 15:48
  JasonB
- Super Simplex Build
  Started by: Peter Hoerlein in: Work In Progress and completed items
- 7
- 18
- 15 June 2026 at 07:08
  Peter Hoerlein
- Running 380V 3-phase motor on 230V 1-phase
  Started by: jimalm in: Electronics in the Workshop
- 13
- 25
- 14 June 2026 at 21:24
  Julie Ann
- Taper Identification
  Started by: Andrew Tinsley in: Workshop Tools and Tooling
- 2
- 2
- 14 June 2026 at 20:46
  Chris Crew
- Lightning 1 2 3
  Started by: duncan webster 1 in: Electronics in the Workshop
- 14
- 51
- 14 June 2026 at 11:07
  Robert Atkinson 2
- Testing Single Point Thread Fitment
  Started by: berwick in: Beginners questions
- 12
- 16
- 14 June 2026 at 10:18
  alecs
- Taylor Hobson Pantograph Engraver Model D 1 2
  Started by: jaCK Hobson in: Workshop Tools and Tooling
- 8
- 30
- 13 June 2026 at 17:56
  jaCK Hobson
- What Did You Do Today 2026 1 2 … 4 5
  Started by: JasonB in: The Tea Room
- 34
- 115
- 13 June 2026 at 15:38
  Dalboy
- Hindu ascetic in picture gallery
  Started by: Bill Phinn in: Website Questions, Comments, and Suggestions
- 3
- 3
- 13 June 2026 at 15:37
  Neil Wyatt

Viewing 25 topics - 1 through 25 (of 25 total)

View full reply list.

Latest Issue

May 2026

Buy Latest/Back Issues

Newsletter Sign-up

Latest Replies