LED bike-light/lamp

This project will show how to make a LED-bike-lamp out of an ordinary bike-lamp .

The lamp mainly consist of a battery (NiCd), a boost converter (MAX857 ) and bunch of discrete components.

 The Leds will be conected to the five pads on the right.

The batteries is size AA, with a capacity of 2200mAh, wich would end up to (2 x 1.2V x2 .2Ah= )5,28Wh.
The output voltage of the MAX857 is 4.1V, total current drawn from the MAX857 is about 5 x(4,1V / 22ohm)=93mA.
This would give a total power consuption of 0,093A x 4.1V=0,381W, the power dissiapation of the MAX857 is
about 0,47W.
All this will end up to 5,28Wh / (0,381W + 0,47W)=6,20h of bright LED-light.

The trip to my work takes about 15min, this will end up to 30min/day, wich would give me
about 13days of LED light! (This is really needed here in Sweden during the autum, winter and early spring.)
During the summer the sun barely goes down.....

Schematics (Eagle): 

      Complete Eagle (4.16r2) files are found here.
      Unrar the files into the directory \EAGLE-4.16r2\projects (in my case : C:\Program\EAGLE-4.16r2\projects)

Below some pictures of the final bike lamp.

               Close-up of the PCB. Here you can see the "late design" connections on the PCB. 
               These connections are the red ones in the circuit diagram above.

   
               Close-up of the PCB.

               The PCB is to be mounted under the LED-reflector.

                Lamp electrically assembled.

                Lamp fully assembled.