Basically I am still in a planning stage and something I am stuck with. I would appreciate guidance/help to stop me going down the wrong and/or expensive path!
I have three components
- 12v 7w DC motor (I think thats 0.50amp?)
- 144 led WS812B 1meter strip - 5V (assuming roughly 7amp when all fully lit)
- nodemcu (3V, 0.5amp I believe?)
Instead of having three separate power supply, I would like to have 1 power source to supply to three of the above devices.
At first, I thought of getting power supply 20v, then using voltage divider using resistance so that it will split 20v into three different voltage (12v, 5V, 3V). However, I am led to believe its not a good idea to have any "load" (ie the motor?) which can effect the voltage to the led and nodemcu (and burn them out possibly?). What I could do with is something that will definitely give me the three voltage I need whether any of them used or not (ie led or motor may be turned off) - does such a thing exist?
Other suggestion (from a friend) was I should forget the 20v power supply brick that I have got and go direct to the mains (240v, uk) to a transformer. This transformer I am looking at gives out 2 x 20Vac. I then need to convert that Vac to Vdc using some sort of "bridge diode + capacitor". this will give me 2 x 12Vdc. One 12Vdc will supply the motor, and the other 12Vdc will be split with a voltage divider (5v+3v) to drive the nodemcu and led.
Whats the best way to do this? A few other terms crops up in my research - Voltage Regulator and Linear Regulator - is that what I should research more into?
As you can see, probably nothing make sense as I am just a wonna-be-electrician! Any guidance/help would be much appreciated.
(ps, the idea is to make a spinning globe with the LEDs on the outside of the globe, which will show images when spinning fast enough - just in time for xmas!)