Specification: MOSFET is an electronic devices with good switching characteristics. It is widely used in circuits, such as power supplies switching , motor drives, lighting dimmer and so on. Relay is another kind of module with switching characteristics. Since relay works relying on mechanical contacts to open or shut. In this way it s will inevitably lead to relay's stopping working while switching time is too short. And papa sound made by relay in some situations is annoying.
We designed a 4-channel MOSFET switch. It can supply up to four groups of electronic switches to control different circuit blocks respectively. Limited by the working principles, MOSFET can only be used to control the DC circuit, such as DC-LED screen and so on, but not suitable for AC circuit control.
In some extreme cases, It can be used to control 100V/33A DC circuit. However, it is suggested that the controlled DC voltage is more than 9V.

The circuit is connected at one end of the wire is slightly controlled some trouble. To control a 12V LED lights, for example,
First, the positive (+) and negative (-) between the connected power

Then connect the positive LED lights with the module connected to the positive (+), LED lights with the anode connected to the switch 1 (S1) on.

If there are other LED lights with the need to control, just the same cathode lights with LED module is connected to the positive (+), LED lights with the negative electrode in turn is connected to the switch 2 (S2), switch 3 (S3), the switch 4 (S4) on;

Connection control side is much simpler, we only need a sensor cable, the corresponding control port Arduino sensor expansion board connected, you can control the 12V LED lights brought by Arduino.