Very basic question, should this (attached picture) circuit work? If yes, you are wrong. It doesn't. If no, please explain how I can make it work.
Its a simple kinda home-made 12V operated DC air cooler with a fan (using Denso blower motor) consuming ~9A i.e. ~100W power and a small water pump consuming ~1A i.e. ~10 watt power. I want to control its motor and pump on/off function from a single-pole 3-position rotary switch. Position 1: off. Position 2: only fan works. Position 3: fan and pump work. In the given circuit, I used 10A10 diode which gets heated due to large flow of current i.e. ~9A when at position 3. Should I use some other diode (with higher current flow rate) or it can't work at all in this way? Using a 2-pole 3-position rotary switch is an easy option, I know. But just for curiosity, I want to make it work that way.
Its a simple kinda home-made 12V operated DC air cooler with a fan (using Denso blower motor) consuming ~9A i.e. ~100W power and a small water pump consuming ~1A i.e. ~10 watt power. I want to control its motor and pump on/off function from a single-pole 3-position rotary switch. Position 1: off. Position 2: only fan works. Position 3: fan and pump work. In the given circuit, I used 10A10 diode which gets heated due to large flow of current i.e. ~9A when at position 3. Should I use some other diode (with higher current flow rate) or it can't work at all in this way? Using a 2-pole 3-position rotary switch is an easy option, I know. But just for curiosity, I want to make it work that way.