We're running an exhibition that uses lots of 1.5V battery LED torches, which will be on for long periods, and their high-brightness means that using batteries is problematic (continual replacement). I'd like to use a PSU to power them, but don't want to have multiple supplies (or at least, I want to minimise the number of supplies used).
Is there an IC/circuit that can take as input, say, a 12V high-current dc supply, and present as output multiple independent 1.5V sources (each drawing approx 0.7A)?
I can't simply chain the torches I've been given in series, because each one has integral circuitry to run in full/dim/flashing mode according to button pressses, and in series they get very confused...
I even considered buying in my own high-brightness LEDs instead, but the torches (with lenses off) produce very sharp images -- they're being used to project shadow patterns in a gallery -- and so far I haven't been able to find a workable substitute. (It's bad enough, incidentally, trying to find a high-current 1.5V supply!)
I searched for similar questions, but none seemed to match exactly what I was looking for.