I’m helping my brother with creating a furniture piece that has doors that open and colourful LED strips.
(The problem is that I only know how to program but have to read up all electronics related things.)
At the moment, I’m stuck on the following decisions:
Q1. Which power source should I use for the solenoid.
(Q2. Can I power the Arduino and the LED strip both with the same 5V@10A power supply.)
I have two power sources:
A) 5V for Arduino (because of the LED strip: 5V@10A)
B) 24V@1A (we have a sponsor how gives us specialised motors for opening cupboards, therefore the constraint of using a 24V power supply.)
Now, both power supplies have more than enough power for a small solenoid, but I’m worried about how to reduce the power in the circuit to avoid too much power at the solenoid. (I am aiming at 8W power at the solenoid.)
A) I would buy a 6V@1A (HS-0530B; DC 6V 1A) solenoid. I guess that running it with only 5V will only reduce the power of the solenoid?
If I understand it correctly, the solenoid will pull more current if available. Therefore, I would add a resistor to keep the current low enough?
(see schematics attached)
B) If I use the 24V power supply, I match the specifications of a 24V solenoid (JF-0530B 24V 300mA), but again, I think I need to add a resistor to limit the power at the solenoid. On the other hand, I read that at 24V the solenoids are less powerful.
I want to use 3m of WS2812B with 60LEDs/m. According to the seller that needs 18W/m, hence 54W. I will reduce the brightness a bit (or shorten it) to stay below 45W. The remaining 5V@1A should be sufficient to run the other devices and the Arduino.