Ok, I've seen some rather brief discusion of these back several years and a few people here and there who have used these drivers with decent success.
I stumbled onto them a couple years ago while ordering speaker parts for my other hobby
from Parts Express. I've been following the meanwell LDD thread since it started and as far as I can tell these are the cheaper equivelent and possibly a little more DIY friendly on the budget builds or just for moonlighting etc. or for those who just want to order a one driver fit's all part (one additional part, a 0.33ohm resistor, requried here, but more on that latter)
I'm wondering why people don't use more of these in the DIY areana? do people not realize they exist yet? just like the LDDs that just were "found" recently in the Reef LED arena.
I bought a couple when I first found them to play with and have found them to be exceptionally versatile and most importantly very, very, cheap, especially if you can handle a little soldering to modify the Rsens resistor and there by set the current of the cheap 0.5 watt driver to any thing you want up to 1 amp!
Pros:
1. REALLY Cheap!
2. current modifieable by simply adding or swaping resistors to yeild your desired output current.
3. convienient screw terminals
4. small form factor (1" x 1.75" x .25" roughly without terminals, .5" with terminals attached)
5. very efficient, just like the meanwell LDD (over 95% possible) they can drive a single LED from a 36 volt plus powersupply and not get too teribly hot.
6. no heatsinking or needing to exactly match powersupply input voltage to output voltage. (still 70% efficient only running 1 led from a 36v source!)
7. pwm dimming, compatable with Arduino or mannual Ebay type LED dimmers
8. operates at 100% without pwm imput so dimming is optional
9. can link two boards together using built in header solder points to get up to 1.5amps! (maybe more with as of yet unexplored additional modified components)
10. so far redily available from a non-wholsale U.S.A based source (parts-express) probably others as well.
11. easy to calculate desired resistor to get the current you want. (0.1/desired mA output = resistor value) result is slightly dependant on output/input voltage relation ship but are close.
12. screw terminals come unattached incase you don't need them.
13. they appear fairley solidly build, good clean looking boards and solder pads/traces.
Cons:
1. some assembly required (you must solder on the screw terminals if you want to use them)
2. only a reall bargin if you plan to resolder Rsens resistors and can get the 1206 surface mount resistors cheap enough to justify not just buying a meanwell LDD.
3. open frame boards so they are not water resistant and need to be appropriatly located in a suitable enclosure somewhere.
4. 36 volt MAX imput voltage.
Link to the .5 watt boards I've used:
http://www.parts-express.com/pe/showdetl.cfm?partnumber=073-046
I stumbled onto them a couple years ago while ordering speaker parts for my other hobby
from Parts Express. I've been following the meanwell LDD thread since it started and as far as I can tell these are the cheaper equivelent and possibly a little more DIY friendly on the budget builds or just for moonlighting etc. or for those who just want to order a one driver fit's all part (one additional part, a 0.33ohm resistor, requried here, but more on that latter)
I'm wondering why people don't use more of these in the DIY areana? do people not realize they exist yet? just like the LDDs that just were "found" recently in the Reef LED arena.
I bought a couple when I first found them to play with and have found them to be exceptionally versatile and most importantly very, very, cheap, especially if you can handle a little soldering to modify the Rsens resistor and there by set the current of the cheap 0.5 watt driver to any thing you want up to 1 amp!
Pros:
1. REALLY Cheap!
2. current modifieable by simply adding or swaping resistors to yeild your desired output current.
3. convienient screw terminals
4. small form factor (1" x 1.75" x .25" roughly without terminals, .5" with terminals attached)
5. very efficient, just like the meanwell LDD (over 95% possible) they can drive a single LED from a 36 volt plus powersupply and not get too teribly hot.
6. no heatsinking or needing to exactly match powersupply input voltage to output voltage. (still 70% efficient only running 1 led from a 36v source!)
7. pwm dimming, compatable with Arduino or mannual Ebay type LED dimmers
8. operates at 100% without pwm imput so dimming is optional
9. can link two boards together using built in header solder points to get up to 1.5amps! (maybe more with as of yet unexplored additional modified components)
10. so far redily available from a non-wholsale U.S.A based source (parts-express) probably others as well.
11. easy to calculate desired resistor to get the current you want. (0.1/desired mA output = resistor value) result is slightly dependant on output/input voltage relation ship but are close.
12. screw terminals come unattached incase you don't need them.
13. they appear fairley solidly build, good clean looking boards and solder pads/traces.
Cons:
1. some assembly required (you must solder on the screw terminals if you want to use them)
2. only a reall bargin if you plan to resolder Rsens resistors and can get the 1206 surface mount resistors cheap enough to justify not just buying a meanwell LDD.
3. open frame boards so they are not water resistant and need to be appropriatly located in a suitable enclosure somewhere.
4. 36 volt MAX imput voltage.
Link to the .5 watt boards I've used:
http://www.parts-express.com/pe/showdetl.cfm?partnumber=073-046
) They do have their 10/20W one that pushes nearly 1500mA but it's $14, although their "5W" ones push about 1000mA max... not sure how 5 watt LEDs gets out of that 
