Play with pyboardCN V2 -- pyboardCN thermal transfer wireless expansion version

zhangyadong300

Play with pyboardCN V2 -- pyboardCN thermal transfer wireless expansion version [Copy link]

 

I drew four expansion boards before, and I finally had some time to make them these two days. [Original] Play with pyboardCN V2 -- pyboardCN LED driver expansion board (TM1628) https://en.eeworld.com/bbs/thread-649898-1-1.html [Original] Play with pyboardCN V2 -- pyboardCN power expansion board (LM2576) https://en.eeworld.com/bbs/thread-649896-1-1.html [Original] pyboardCN V2 Play -- pyboardCN Voice WTV020-SD + DHT11 Expansion Board https://en.eeworld.com/bbs/thread-649853-1-1.html [Original] pyboardCN V2 Play -- pyboardCN Wireless Expansion Board https://en.eeworld.com/bbs/thread-649798-1-1.html The first step is to print the designed PCB file on the thermal transfer paper. Because the single-sided copper plate is used, the wiring is mostly on the top layer, and only a few wires are on the bottom layer. The second step is to cut the copper plate and use sandpaper to grind off the outer oxide layer. The third step is to preheat the copper plate with the electric iron, stick the thermal transfer paper on it and iron it with the electric iron. The spacing of the copper was not set well during the design. The spacing was too small. I was afraid that the corrosion would not be thorough later, so I used a knife to adjust it. Then you can put it in the etching solution. Omit the welding process This content is created by EEWORLD forum user zhangyadong300. If you need to reprint or use it for commercial purposes, you must obtain the author’s consent and indicate the source

lising

Should the dead copper be removed?