I have such little understanding of electronics that I thought it would be better to ask for your help rather than trying to teach myself.
My enquiry will be childs play for you guys, so here goes:-
I have a motorcycle with a heated seat(< 1 amp) which is powered by 12v PWM which has 4 settings
of say 5% - 10% - 25% - 50%, controllable from the handlebars.
I would like to use the seat PWM supply to power a heated jacket (12v, 5 amp) which currently has a PWM controller outputting 50% - 75% - 100%. (BTW 100% gets far too hot)
The challenge therefore is to control a MOSFET or SSR to avoid overloading the seat supply, but to increase the PWM duration by a factor by ≈1.8.
Being fitted on a motorcycle, it would also need to be compact and durable.
All suggestions will be gratefully received.