HI, update on the new circuit I am using for my K-light dynamo prototype...
I now use 4 /220uf low esr / high ripple reg cap's, instead of a bi-polar cap.
I use 2 to form a 100uf bi-polar, then switch in a second string, so switching 100/200uf in place of bi-polar, most of the time I am in 200uf mode, but nice to switch for more power around 27-35 or for less power drain at low speed when I want less drag...
This give's me better results than the fullwave / voltage doubler config.
if you compare the data below you will see what I mean
EX: on fullwave 200uf @ 15km/hr I get 480ma across the string of 3 LEDs
if I had a 100uf fullwave & switched in the doubler I only get 430ma.
so better use of the power I feel with this config...
Fullwave, 220uF, 3 LEDs
Read as Speed V I P
4.0 km/h 7.59 V 2 mA 0.01 W
5.0 km/h 8.12 V 23 mA 0.19 W
7.0 km/h 8.71 V 100 mA 0.87 W
9.0 km/h 9.18 V 180 mA 1.65 W
12.0 km/h 9.63 V 310 mA 2.99 W
15.0 km/h 10.05 V 480 mA 4.82 W
18.0 km/h 10.30 V 660 mA 6.80 W
19.0 km/h 10.36 V 670 mA 6.94 W
20.0 km/h 10.28 V 660 mA 6.78 W
24.0 km/h 10.16 V 600 mA 6.10 W
29.0 km/h 10.09 V 570 mA 5.75 W
35.0 km/h 10.04 V 550 mA 5.52 W
53.0 km/h 10.04 V 530 mA 5.32 W
Doubler, 220uF, 3 LEDs
Speed V I P
4.0 km/h 8.30 V 41 mA 0.34 W
5.0 km/h 8.58 V 70 mA 0.60 W
7.0 km/h 8.92 V 120 mA 1.07 W
9.0 km/h 9.30 V 200 mA 1.86 W
12.0 km/h 9.76 V 350 mA 3.42 W
13.0 km/h 9.82 V 390 mA 3.83 W
14.0 km/h 9.74 V 370 mA 3.60 W
16.0 km/h 9.60 V 320 mA 3.07 W
18.0 km/h 9.55 V 300 mA 2.87 W
20.0 km/h 9.51 V 290 mA 2.76 W
23.0 km/h 9.48 V 280 mA 2.65 W
26.0 km/h 9.45 V 280 mA 2.65 W
31.0 km/h 9.43 V 270 mA 2.55 W
54.0 km/h 9.40 V 260 mA 2.44 W
Fullwave, 100uF, 3 LEDs
Speed V I P
4.0 km/h 7.69 V 3 mA 0.03 W
5.0 km/h 8.14 V 26 mA 0.21 W
7.0 km/h 8.47 V 50 mA 0.42 W
9.0 km/h 8.79 V 100 mA 0.88 W
12.0 km/h 9.16 V 170 mA 1.56 W
15.0 km/h 9.44 V 250 mA 2.36 W
18.0 km/h 9.75 V 350 mA 3.41 W
21.0 km/h 10.04 V 490 mA 4.92 W
23.0 km/h 10.24 V 610 mA 6.25 W
25.0 km/h 10.42 V 740 mA 7.71 W
26.0 km/h 10.50 V 820 mA 8.61 W
27.0 km/h 10.58 V 900 mA 9.52 W
27.5 km/h 10.62 V 910 mA 9.66 W
28.0 km/h 10.55 V 900 mA 9.50 W
30.0 km/h 10.34 V 740 mA 7.65 W
31.0 km/h 10.33 V 710 mA 7.33 W
37.0 km/h 10.14 V 630 mA 6.39 W
43.0 km/h 10.06 V 600 mA 6.04 W
54.0 km/h 10.00 V 570 mA 5.70 W
Doubler, 100uF, 3 LEDs
Speed V I P
4.0 km/h 8.10 V 24 mA 0.19 W
5.0 km/h 8.30 V 42 mA 0.35 W
7.0 km/h 8.57 V 70 mA 0.60 W
9.0 km/h 8.79 V 100 mA 0.88 W
12.0 km/h 9.09 V 170 mA 1.55 W
15.0 km/h 9.49 V 270 mA 2.56 W
18.0 km/h 9.89 V 430 mA 4.25 W
19.0 km/h 9.91 V 470 mA 4.66 W
19.5 km/h 9.93 V 490 mA 4.87 W
20.0 km/h 10.00 V 500 mA 5.00 W
20.4 km/h 9.70 V 400 mA 3.88 W
20.5 km/h 9.68 V 390 mA 3.78 W
21.0 km/h 9.64 V 370 mA 3.57 W
21.7 km/h 9.63 V 360 mA 3.47 W
24.0 km/h 9.57 V 330 mA 3.16 W
28.0 km/h 9.49 V 310 mA 2.94 W
36.0 km/h 9.42 V 290 mA 2.73 W
55.0 km/h 9.37 V 270 mA 2.53 W
K