Paul Lousick | 30/01/2013 11:11:00 |
2276 forum posts 801 photos | These are 48 white LED panels which I have mounted on my milling machine. Bought them on e-bay for $2.59 each which included free postage from Hong Kong. Powered them from an old 12v plugpack. They come with double sided tape which I stuck to the underside of the mill head. (shown below iluminating work area) Edited By Paul Lousick on 30/01/2013 11:15:22 |
Michael Gilligan | 30/01/2013 11:22:51 |
![]() 23121 forum posts 1360 photos | That looks a bargain. Paul Thanks for posting. MichaelG. |
Paul Lousick | 30/01/2013 11:46:36 |
2276 forum posts 801 photos | Michael, A bargain and better than the lights which I had already added to the mill. The originals were mounted on flexible arms and mounted to the side of the column. (you can see one of them in the top photo) They originally had incandescent lamps fitted but they would not stand up to the constant vibration and quickly failed. Replacing the globes with LED's solved this but they were always getting in the way of the drill lever and the electric cables powering the drive motor. These do a much better job, there is no glare from the lights and they are directly over the work area. Paul. |
Chris B | 31/01/2013 08:55:43 |
34 forum posts 5 photos | I had a look on ebay yesterday and decided that 2 for £3.10p delivered was worth a try, so I will report back when they arrive. Edited By Chris B on 31/01/2013 08:56:02 |
Jeff Dayman | 31/01/2013 11:00:56 |
2356 forum posts 47 photos | I also ordered a pair for my mill. Much more space efficient than housing/arm type lamps. Thanks for the tip Paul! JD |
chris j | 31/01/2013 11:41:56 |
338 forum posts 17 photos |
Looks like a good idea.
Anyone got an ebay link or number ?
|
Paul Lousick | 31/01/2013 11:53:33 |
2276 forum posts 801 photos | Got mine from http://stores.ebay.com.au/dreammacys6au?_trksid=p4340.l2563 Search for: 48 SMD White LED Light Panel T10 Festoon Ba9s Dome 12V |
John Stevenson | 31/01/2013 12:51:06 |
![]() 5068 forum posts 3 photos | Found some at £1.29 free postage. Ordered a dozen |
Les Jones 1 | 31/01/2013 15:08:57 |
2292 forum posts 159 photos | After seeing Paul's post yesterday I noticed that some suppliers used 5050 LEDs and some used 3528 LEDs. The 5050s are a slightly higher power rateing so I ordered two of those. (At £3.00 each including post.) I too will report back when they arrive. (Probably early March.) Les. |
Douglas Johnston | 06/02/2013 14:59:42 |
![]() 814 forum posts 36 photos | I have just received one of these panels to try out (from UK source to get it quickly-although more expensive) and they are very nice indeed. At 10V they take about 150mA and at 12V the current is about double, although the change in light output is not great. The light output is pretty good, but it is the small size (6 by 4 cm) which makes them easy to mount on the mill, perhaps with a clear plastic cover to protect the led's. Conclusion- well worth buying-off now to buy some more from China. Doug |
fizzy | 14/02/2013 20:40:36 |
![]() 1860 forum posts 121 photos | just fitted mine. I recon they will fall off due to not sticking flat, but a bit of epoxy will cure that. Otherwise this is the best accessory I ever bought!!! Brilliant!!! |
Les Jones 1 | 14/02/2013 20:52:21 |
2292 forum posts 159 photos | The two LED panels I ordered from Hong Kong arrived today. Here is the details of them.
Notes on rectangular panel of 48 type 5050 LED's (Type 5050 LED's have 6 pins on the package.)
I think they may be too bright with 2 of them mounted next to the spindle and run from 12 volts. Les. |
brett tustian | 14/02/2013 21:28:06 |
1 forum posts | Have a look at ledhut.co.uk
Edited By David Clark 1 on 14/02/2013 21:35:38 |
Paul Lousick | 14/02/2013 21:41:54 |
2276 forum posts 801 photos | Hi les, If your LED's are too bright can you reduce the voltage with a variable resistor ? |
Stub Mandrel | 14/02/2013 22:12:06 |
![]() 4318 forum posts 291 photos 1 articles | If i understand correctly, that's 22.5 mA through each chain of leds, so dropping 120R x 22.5 = 2.7V. So (12-2.7)/3 = 3.1V per LED, which is about right for white LEDs. Because the LEDs act as near constant voltage devices they will still drop around 3V wether the current is higher or lower. The 16 120R resistors are effectively in parallel, so effectively about 8R. You could try a wirewound 47R variable resistor which should give you a good range of dimming. Neil
|
Douglas Johnston | 02/03/2013 09:27:55 |
![]() 814 forum posts 36 photos | Just bought an electronic LED driver for £4 on ebay (plenty people sell them around the same price) and it is perfect for running these panels. The unit is small and can supply up to 1A at 12V so could run a few panels. It also has the advantage of isolating the mains supply from the machine. Doug |
Les Jones 1 | 02/03/2013 10:04:17 |
2292 forum posts 159 photos | Update on the LED panels (48 x 5050 type SMD LED's) I have now fitted them to my X3 mill. They give just the right amount of light.
Neil, Les. |
John Hinkley | 04/03/2013 12:49:32 |
![]() 1545 forum posts 484 photos | My two arrived this morning. I hooked one up to a car battery and was surprised at the amount of light they put out! My question is: is there a 12v source within the mill supply that I can tap into, to save having to buy a separate power supply? My mill is an XJ-12 from Amadeal (similar to Sieg X3) - picture inmy album - I have a block diagram for the wiring, but not circuit diagram, as such. John
|
Michael Gilligan | 04/03/2013 13:32:48 |
![]() 23121 forum posts 1360 photos |
Posted by Stub Mandrel on 14/02/2013 22:12:06:
If i understand correctly, that's 22.5 mA through each chain of leds, so dropping 120R x 22.5 = 2.7V. So (12-2.7)/3 = 3.1V per LED, which is about right for white LEDs. Because the LEDs act as near constant voltage devices they will still drop around 3V wether the current is higher or lower. The 16 120R resistors are effectively in parallel, so effectively about 8R. You could try a wirewound 47R variable resistor which should give you a good range of dimming. Neil . This may work; but the preferred way of dimming LEDs is to use PWM [pulse width modulation] ... There are some very neat little dimmers available on ebay; at prices that make it pointless to bother building one. MichaelG. For Example Edited By Michael Gilligan on 04/03/2013 13:40:31 |
Les Jones 1 | 04/03/2013 14:38:13 |
2292 forum posts 159 photos |
Hi John, 1 The 12 volt rail is provided by an LM78L12 regulator which is only rated at 100 mA 2 All the power to the board is from a bridge rectifier connected directly to the mains. THIS MEANS THAT EVERYTING IS LIVE AT MAINS VOLTAGE SO IT WOULD BE VERY DANGEROUS. I suggest using a power supply simiar to this one on ebay. You may find one cheaper than this one. Les. |
Please login to post a reply.
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
Sign up to our newsletter and get a free digital issue.
You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy
You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.
Click THIS LINK for full contact details.
For subscription issues please see THIS LINK.