I'm working on a project which involves a DC heating element, a computer fan and an Arduino/ESP8266. I'd like to use one power supply for those devices.....
- The heater needs a steady 12V / 1A DC
- The fan needs 0 - 12V to operate
- The Arduino/ESP8266 needs 3.3 or 5 volts
- Here in Belgium, we have AC 220V mains electricity. I'd like to use 1 power supply (for instance of a laptop)
Here is a schema of the project:
I have 2 questions:
How much Volts/Amps does my power supply need, to get those 3 things working, safely, without overheating?
How do I connect the devices to the power source so that the Arduino/ESP8266 isn't getting to much volts/amps when the heater is switched off or the fan is shut completely down?
Looking forward to some suggestions!