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Hi Chris,
Thanks for the suggestion re LM2596 modules, I will look into them and they look like what I am after.
Re the power supply, I understand your concerns about the actual current and output. The way I thought it is that the 12v input will be stepped down to 7.8v output socket to the fake battery into my DSLR. so if anything, the stepper/LM2596 module will be blown first and not fuse in my DSLR.
Re the power output of 25w, I too thought it was on the high side.
I use a 20w rubberised band for my c8, but it ends in a fused cigarette plug. I could rewire the existing heater into an RCA plug as an alternative.
The reason I want to make a new band is I want to keep the bands the same and I have sufficient length of nichrome wire for it. The other way I look at it is that each band will be connected to a potentiometer, and therefore I can always turn the power down.
Happy to hear your views on my train of thought.
Thanks
Bo
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