How to pick up the gasoline trowel small bulbs
Simple calculation method, using 12V divided by the work current of a single LED, draw the resistance value, and then properly reduce, and gradually experiment, you can find the appropriate resistance value.
According to the working voltage of LED, the small lamp power parameters, can calculate the working current of single LED lamp; according to the working current and voltage parameters of LED series circuit, according to Ohm formula, we can calculate the required series current limiting resistor resistance and power size.
First of all you need to know the relevant parameters using LED small beads: rated voltage, power.
