I am trying to drive a common anode 12V LED Strip with a little circuit i made.
Basically there Gate Pin from the BUZ 11 is connected to an arduino Pin via a 2,2kOhm resistor. the Led Strip cathodes are connected to the drain pins of the transistor and the cathode of the power source is connected to the source pin.
Nevertheless it won't work.
When I brigde the cathode of the power source to a cathode of the led strip the corresponding color will work so its not the led strip.
Though when i try to bridge the 12v of the power source to the gate pin of the transistor there is a spark and my power source shuts down(its my computer).
basically there is no common ground. the ground which is on the source pins of the mosfet is from the power source, which is my computer power supply's dvd drive molex connector. the ground which is on the arduino is the usb ground i think. so basically the resistor is not between source and gate.
apart from that yes its the same design.
All GNDs need to be connected. Need a common reference point, GND provides that.
The 10K resistor just keeps the MOSFET off after a Reset, when the pins become inputs and 'float', and can be high enough voltage to turn on the MOSFET.
If i connect the Power supply's 12V to Vin and the Ground to GND from the Arduino. All I get is a hot voltage regulator on the arduino and a not responding arduino(i cant program it via usb). Any Ideas?
Well it seems i'm not able to read a manual properly. Thanks for linking to the reference sheet again. Although I read it several times i wasn't able to see that the gate pin on buz11 is the left one and not the middle one which is the usual gate pin. It was simply that. Nevertheless you were right, i had to connect arduino's gnd to the gnd of my power supply for it to work.
Anyway it works now.
