[DIY Bing Dwen Dwen] + Late-arrived Bing Dwen Dwen

北方

[DIY Bing Dwen Dwen] + Late-arrived Bing Dwen Dwen [Copy link]

1. I have been busy recently, so I will participate in this interesting DIY activity later, but the process is still very interesting. I made an op amp evaluation board. Originally, I wanted to use the shape of the dung as the GND copper. After making several versions, the function was greatly affected, so I finally simplified it.

2. First, design the circuit, select MCP6032 as the op amp chip, and use mindi to simulate

Use step wave to simulate and adjust the parameters.

Magnification and so on remain linear.

3. Start designing the PCB, first design the circuit diagram using components,

Quickly convert it to PCB, adjust the wiring, lay copper, and then add Dun Dun.

4. Because the logistics has been too slow recently, I initially made a plate with thermal transfer paper and planned to make the plate myself. As a result, the temperature was too high, and I didn't expect the heating table to be not flat enough.

The effect is not ideal,

Let's go get some wool.

In fact, the cost of industrialization is definitely much cheaper than doing it yourself, and the quality is good. Doing it yourself is slightly faster, and you can correct errors. There are some problems this time. The VCC line is not connected, which needs to be dealt with again.

Then it was soldered and tested.

okhxyyo

Awesome!!

tagetage

Almost no one does heat transfer now, so it’s better to do proofing, which is cheaper.

freebsder

I watched the whole process from getting started to giving up, hahaha. That half-finished product is really ugly.

led2015

Looks pretty cute