Design of PCB circuit board for bit miner

1. This is actually a lot of attention. Let's summarize it slowly when we have experience. Generally speaking,
1 plate size, size, single / double plate or multi-layer plate
2 component layout, mole layout, a function mole as close as possible
3 wiring, pay attention to the size of the current about the wire thickness, electromagnetic interference, less use right angle wiring
4 check, check for errors, or apply copper as required

2. There are many kinds of PCB materials. First of all, you need to make sure how many layers you want to make
then choose the material
it can't be done by hand. There are many processes
with the cost of purchasing various materials, you can directly ask others to make a model for you
if you don't understand, you can continue to ask me.

3.

Amateur PCB proction, there are two methods of thermal transfer and UV exposure are more commonly used

the equipment used in the heat transfer method includes: copper clad laminate, laser printer (it must be laser printer, ink jet printer, needle printer, etc.), heat transfer paper (it can be replaced by the back paper behind the self-adhesive, but ordinary A4 paper can not be used), heat transfer machine (it can be replaced by electric iron, photo plastic packaging machine), heat transfer printing machine (it can be replaced by the back paper behind the self-adhesive) Oily marking pen (must be oily marking pen, its ink is waterproof, not water-based ink pen), corrosive drugs (generally with ferric chloride or ammonium persulfate), bench drill, water sandpaper (the finer the better)

the specific operation method is as follows:

1. roughen the copper clad surface of CCL with water sandpaper, grind off the oxide layer, and then rinse and dry the copper powder proced by grinding with water

2. using a laser printer, print the left and right mirror images of the printed PCB file onto the smooth side of the heat transfer paper. The routing is black and other parts are blank

   

3. after demoulding, clean the resial sodium hydroxide on the PCB with water, and then dry it to make holes< br />

4. First learn circuit, analog, digital, and then work hard to learn unit mole circuit design, peripheral circuits are composed of unit mole circuit, learn unit mole circuit design, detailed reference chip specification design peripheral circuit is simple, of course, circuit design also learn transistor circuit design, integrated circuit design, high frequency circuit design and so on.. Anyway, the study of circuit design to learn a lot of knowledge, step by step!!

5. Line layout --- cutting --- drilling --- sinking copper --- grinding plate. Cleaning --- line ink --- baking --- line anti etching film --- exposure --- development. Cleaning --- detection --- etching --- removing film --- grinding plate. Cleaning --- detection --- solder resist --- high temperature baking --- pad anti etching film --- exposure --- development. Cleaning --- detection --- character --- solidification --- cleaning --- sinking. Gold plating --- spraying. Tin plating or other --- cleaning Washing --- numerical control molding or die punching --- V cutting and injection single piece delivery without this process or other connection methods --- washing --- electrical testing --- final inspection --- point subcontracting --- warehousing

6. If you want to satisfy your electronic hobby, you can first make a LED flashing light controlled by a multivibrator, then make a simple audio amplifier circuit, and then make a power amplifier. It's not much investment, and it's fun. You can learn something in the process. There are a lot of information on the Internet. You can go to the electronic market to buy energy components, As for the circuit board, if you can draw one, then send it out for proofing, generally 100 yuan. Of course, you can also use the universal board, but the circuit is not so neat.

7. Let's look at how to design a PCB from scratch from the perspective of the public
1. The Chinese name of PCB is printed circuit board. Its function is to provide electrical access for the electronic components on the board. How do you know how this electrical path should be connected? We're going to introce the circuit diagram< How do circuit designers know how to connect components? This is going to be extended to the main chip
3. What are the main chips in a circuit diagram? For example, for mobile phones, the main chips are: processor, memory chip, local memory chip, 4G communication mole, WiFi mole, etc. How does a specific mole designer know how to design
4. The design of a mole is divided into two parts: bus connection design and power supply design. Most of the bus connections are universal. The power connection is also based on the chip manual
5. Although most of the bus connection and power connection can be designed according to the manual, there is still a need for a more specific method to design. At this time, the reference design of the chip manufacturer is needed, that is, how to connect each interface and how to use capacitance and resistance for power supply
6. With the design method of each mole, how can I know which moles I want to use? This requires a document called "proct requirement table"
7. Where does the proct requirement list come from? It can be measured by the boss and proct manager according to the possible proct direction, it can be obtained by referring to the same proct, it can be obtained by the business personnel according to the needs of customers

as mentioned above, we have already pushed a PCB from the back to the front. Next, let's push from the front to the back:
the leadership puts forward the proct requirement table - determines which moles are needed for the circuit diagram - designs the circuit diagram of each mole separately - summarizes it into a complete circuit diagram - draws the PCB according to the circuit diagram.

9.

Generally, it is necessary to extend the lead out. If the distance between the two pins is too far, it can only take a serpentine line

as shown in the figure below

Of course, the differential line should be wound together in this way, otherwise it will not be called differential line. I don't know what chip you have. Generally, when designing chips with differential clock and signal (DDR, HDMI, USB, etc.), we will consider that the output pins of differential signal are adjacent to each other to facilitate wiring. If it's too far away, how can we go?

if it's really this kind of situation, my idea is to take a point with the same distance from the two pins between the two differential pins, and then wind the two wires to the change point for differential routing, you can wind a little to the side

10. Only Proteus has been used, which is only a general simulation, and there is an error with the actual circuit, which is not accurate