Introduction to the steps of drawing circuit diagrams on the board

1. Connect the board function.

2. Read the chip data of the important integrated chip on the board to understand the chip function and the functions in this circuit.

3. Divide the circuit into modules and ensure that each component on the board is divided into one module. For example, there may be a power module, a main control module, a signal acquisition module, a display module, and the like in the circuit. And use a multimeter to measure components in the circuit that are not easily divided into modules.

4. According to the divided circuit modules, start drawing the circuit diagram of each module.

5. Draw a circuit diagram to ensure that no components are pulled down. Check the circuit diagram after drawing to ensure that the circuit diagram is correct.

6. Analyze circuit functions to ensure correct circuit board circuitry.

If in the final analysis, it is found that a function is different from the typical circuit given on the chip data, it may be that you draw the error and need to check it.