Re: Badboy 400 Lux III or Lamda\'s New Mini Pro III?
I just checked out Lambda's DC/DC converter (the $9 one), looks nice. (I couldn't find the MiniPro III)
The biggest difference between these is the output current, but if you compare a BB500 then that difference goes away. That leaves size and cost. (The combo with the QWOH looks quite hard to resist) /ubbthreads/images/graemlins/wink.gif
As far as regulation goes the Lambda site reads "Although not truly regulated, the DC/DC boost converter did produce fairly flat light output over the life of the batteries." And the graph shows a pretty flat output.
The BB400 is a current regulated design and should be quite flat, but I'm not sure you'ld notice much difference between the two discharge curves in actual use. There is a difference in drive currents - 400mA vs 550mA. Also the diameters are different, if thats an issue for your application. The Lambda states it will work with a 1.2V NiMh, the BB400 minimum is 1.6V. I'm not sure how close the two are in efficency, but my guess is they are close.
Not trying to sway you either way, cause I think you'll be satisfied with either one.