This is very similar to what another member posted a few weeks ago. I built this driver and found it can do 2 A with 4 V input. It shuts off when the battery gets to 3 V. Mine is currently driving an M140 diode at 1.25 A and barely gets warm. I calculated the efficiency to be 82% into my diode at 1.25 A.
I don't want to make it too easy for someone to copy and sell these so I won't give a PCB layout. Feel free to design a layout and give this driver a try.
See my full build at Chris's Electronics Page
I don't want to make it too easy for someone to copy and sell these so I won't give a PCB layout. Feel free to design a layout and give this driver a try.
See my full build at Chris's Electronics Page
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