Better circuit.
I like this schematic because the circuits do not share the same ground. We don't know how stable is the supply power supply come with the strip, they are often fluctuating.
- The above schematic only works in the assumption that the black (or white) wire is the common anode, Some manufacture have that wire as the common cathode which is more common now because they only draw (+) power when needed.*
This what I propose:
They are N channel mosfets
Advantages:
- The powers supply are separated to protect the Arduino
- Although the schematic was drawn to work with common anode strips it can be modified to work with common cathode ones
- It will work with higher voltage 24V, 48V . . . ETC
Some of my strips have common cathode. In this case:
- Black wire of the strip is connected to the negative terminal of the power supply
- D pins of the mosfet are connect to positive terminal of the power supply.
- S pins are respective color coded as R,G,B.
Happy Mosquito Free!