Forgive my ignorance, I have a great deal of confusion over mosfets, I have googled the subject and looked at sites that explain the datasheets, I have searched this forum and not really found the answer in terms i could understand.
GOAL: I'm trying to have my Adruino Uno rev3 using motion sensor(s) to turn on 12v (0.5-5 amp) LEDs in a staggered manner such that the closest one to the sensor comes on, then the next closest 3-8 seconds after that and continue down the line (9x). until they are all on and then they would go off after a delay in the order they came on.
I believe I have the sketch properly written; still waiting on parts to confirm it works but the compiler does verify, I can figure out the code myself (I think). But I am having trouble finding the proper Mosfet, I chose Mosfet because of the cost I'm trying not to spend too much on this project as it's just kind of a learning exerciser for me. I just got my adruino about a week ago and I don't have the sensors yet but I have a button for testing. Also I have more time than money right now. I tend to order parts from China and just wait for them to come in (4-6 weeks). So I really want to get the proper component to avoid this dragging out for months and months.
I have digital pins 3-12 feeding the signal to open the mosfet gate, from the info i have managed to gather on my own I think the Mosfet I need is:
"IRF520N IRF520 TO-220 N-Channel"
at a cost of about $0.30 each (shipped from China) and I would need at least 9 for my project and don't mind having some spares. Then anything over 1 amp would require a heat sink (I have been collecting heat sinks from old computers and such so I have them around).
As I understand it I would use the mosfet gate to open the ground to complete the circuit?
Any suggestions on the proper Mosfet would be appreciated or if I am going at this in a backwards/sideways manner, I am open to criticism/help.
Thank you for your time