The above circuit is an attachment for any type of microcontroller, but I used it with a homemade atmega88p microcontroller chip. This board/ circuit allows the chip to turn on and off things like led lights acting like solid state relays. This circuit uses 4 IRF 540 n-channel MOSFETs, switching on and off the negative side of the LEDs.
Below shows the pinout of IRF540.
Below shows the Micro-controller controlling LED Lights
