Pay attention to the quality of circuit boards and the PCBA quality control system. rigid-flex board from the era of quality to the era of brand.
For rigid-flex boards, there will be no change in the metal material unless the insulation board is used as the substrate. Gold fingers or non electroplated PCBs do not conduct electricity because their conductive parts are directly connected to the end electrodes of the circuit board. Conductive materials are usually used to prevent signal reflection, and if they are not metallic, it is recommended to use yellow conductors.
The following discussion is only about the situation when the metal layer is connected. The current generated by the metal being connected will not affect the circuit through other components. The current will become greater. This is because the voltage induced by the current at both ends of the wire is much higher than the voltage of the conductive layer. If there is a significant relationship between resistance and the current passing through, voltage may not break through the wire. If the wire has a high resistance, voltage may break through the wire. The distance between the wire and the conductive layer will also be smaller because the voltage drop is proportional to the resistance, rather than the total resistance. This is also a common reason for voltage drop, as the maximum current flowing through the current has a significant relationship.
I have also used my current, although the voltage drop is small, it actually exceeds the current, making my work completely unnecessary and even impossible to succeed.
Before the experiment, I suspected that the current I was using only detected the circuit and consumed a certain amount of current, rather than other currents. In fact, there is an analog signal that detects the circuit, as these circuits use a voltage output of 7W.
I think this can be used to monitor the circuit, which is also the simplest. It only requires two parameters, two digital resistors, to detect the circuit.
The basic circuit diagram is shown in the figure. When the circuit is read from one chip by the circuit diagram and the two pin pins of the other chip are defined as output voltage and their corresponding relationship is maintained, the input voltage of the two devices is established as.
Each power supply needs to have the transistor and LED. We need one type of IC, one type of output diode, and another type of combination of switch diode and LED. All the components inside are electronic components, so it's not important to pay attention. We recommend these two alternative models because of their high cost.
If it is equipped with an IC, it is possible that the customer may burn the output pins, which can also cause motor load issues. We will discuss the solution later, otherwise it may easily lead to module failure.

After using the tutorial, I may have a better understanding of the original thing. It is recommended to independently create a relay or connect the GPON board to the relay or other modules. This type of module is useful in many places, and many friends will not use it for a while. In fact, choosing a relay does not necessarily require the use of a module. After passing through a relay or other modules, you can find the module you need, which can be more convenient for configuration and preparation. Now this module either uses only one module to drive the relay or only one module to drive it.
It's not just about having one relay or using one module to drive, which makes configuration more convenient and allows for more project configuration. Multiple modules can also be connected in series.
It is not just a single relay that can add 6 JTAG (converters) on the board. Since the relay can store three signals, and of course, the switch can also control several of its own loads (data with a threshold value of one), before isolation, the relay remains at a low level and requires three 0-1V voltages. When the main power supply is closed or converted to normally open (or disabled), if the input current or voltage rises, the relay begins to operate, If the relay is turned on (or off) again, it will stop working (or off), turn off (or off), and create a gear diode on the panel to allow the relay to work. The relay only needs to work at a high point, usually with input.
Input quantity: 100 10-50KVA (input/output, DW1502 grounded when connected to the power switch), each DW1502 grounded, and all relays grounded, with a specification of one battery or capacitor.