joachim Haagen Be
Senior Member
Hello all,
As promised I'm posting shots of the actual DIY LED light. You can see some first-shots with this light on this thread: http://forums.dpreview.com/forums/readflat.asp?forum=1036&thread=21785927 .
As I mentioned in the other post, it is made with 40 40000 mCd LEDs wiht one 80 Ohms resistor each. The power-pack is 4 rechargeable AA's which is connected with a standard audio-cable and plugs. The LEDs have a max voltage between 3.2 and 3.4 Volts, which is why I need one resistor per LED.
The whole package costs about 20 dollars to make, if you already have a soldering iron. If you dont, add about 20 dollars to the price. You need 40 LEDs, and 40 resistors (calculate your Ohm value based on the battery combined voltage), a pierced PCB board some wires and a couple of plugs. In addition, you might need a stepping ring to connect the LED light to the camera. In my setup I have a 55-72mm step-up ring, that I have drilled a hole through. Drill a hole through the PCB board as well, and use some beny light-weight metal to connect the PCB to the stepping ring. You can get everything you need very cheap through Ebay, from Hong Kong sellers. I got the LEDs and resistors (50 each) for about 10 US dollars + shipping. The PCB board was about 3 dollars.
Now, the end result looks somewhat like this:
And from the back:
I decided to keep negative on the left hand-side and positive on the right-hand side, to make it easier to kepp track of which way the LEDs go
When turned on:
I also have a cheap deflector, which is the lid of an unnused slide-box (the one you get back from the photolab when you develop slides), which evens out the light slighlty:
You can see the difference using the deflector better in the next two shots. First is without, and second is with the deflector:
If anyone would like more details, dont hesitate to ask.
--
All The Best,
Joachim
http://www.flickr.com/photos/joachimhb/
As promised I'm posting shots of the actual DIY LED light. You can see some first-shots with this light on this thread: http://forums.dpreview.com/forums/readflat.asp?forum=1036&thread=21785927 .
As I mentioned in the other post, it is made with 40 40000 mCd LEDs wiht one 80 Ohms resistor each. The power-pack is 4 rechargeable AA's which is connected with a standard audio-cable and plugs. The LEDs have a max voltage between 3.2 and 3.4 Volts, which is why I need one resistor per LED.
The whole package costs about 20 dollars to make, if you already have a soldering iron. If you dont, add about 20 dollars to the price. You need 40 LEDs, and 40 resistors (calculate your Ohm value based on the battery combined voltage), a pierced PCB board some wires and a couple of plugs. In addition, you might need a stepping ring to connect the LED light to the camera. In my setup I have a 55-72mm step-up ring, that I have drilled a hole through. Drill a hole through the PCB board as well, and use some beny light-weight metal to connect the PCB to the stepping ring. You can get everything you need very cheap through Ebay, from Hong Kong sellers. I got the LEDs and resistors (50 each) for about 10 US dollars + shipping. The PCB board was about 3 dollars.
Now, the end result looks somewhat like this:
And from the back:
I decided to keep negative on the left hand-side and positive on the right-hand side, to make it easier to kepp track of which way the LEDs go
When turned on:
I also have a cheap deflector, which is the lid of an unnused slide-box (the one you get back from the photolab when you develop slides), which evens out the light slighlty:
You can see the difference using the deflector better in the next two shots. First is without, and second is with the deflector:
If anyone would like more details, dont hesitate to ask.
--
All The Best,
Joachim
http://www.flickr.com/photos/joachimhb/
