Hi!
I'we looked arround and have found some threads about buck and boost, but haven't found what I need to get of with my project. I have seven seoul P4 LEDs serial mounted on a hexagonal board with high temp. transportation. I will mount the board on a heatsink with some "Ag-glue/CPU" or something, so I hope heat won't be a problem.
The batteries I have is two packages of NiMh 6V 4,5Ah linked in series. So theoretical voltage should be about 12V. Every LED should run @ 350mA, fV ~3,25V. So I would need some help with a step-up circuit that produce this current/Voltage as long as possible during battery "burn time". A plus would be that I have the possibility to see if the batteries comes near "maxdischarge voltage" (~2V?).
By the way, size does mather =)... The application that I will use this, is in crosscountry running, so a quite small, light circuit would be prefered.
I'l send some pictures during work, and if I can get of with the electronics I'l show some in action shoots.
I'we looked arround and have found some threads about buck and boost, but haven't found what I need to get of with my project. I have seven seoul P4 LEDs serial mounted on a hexagonal board with high temp. transportation. I will mount the board on a heatsink with some "Ag-glue/CPU" or something, so I hope heat won't be a problem.
The batteries I have is two packages of NiMh 6V 4,5Ah linked in series. So theoretical voltage should be about 12V. Every LED should run @ 350mA, fV ~3,25V. So I would need some help with a step-up circuit that produce this current/Voltage as long as possible during battery "burn time". A plus would be that I have the possibility to see if the batteries comes near "maxdischarge voltage" (~2V?).
By the way, size does mather =)... The application that I will use this, is in crosscountry running, so a quite small, light circuit would be prefered.
I'l send some pictures during work, and if I can get of with the electronics I'l show some in action shoots.
