Chengdu Metro Transportation Network Business Card

What, I spent four years of college in Chengdu and didn’t go out much. It's good now. I can study in Chengdu for three years again. I will definitely go out for a walk this time.

ref: https://oshwhub.com/ljylovewyn/xi-an-di-tie-NFCming-pian refers to the above project to redo the Chengdu version, mainly modifying the size to 86x54, which is as big as a bank card. I don’t know yet whether the font will be overturned after the reduction, but I have already placed an order.

Children's Day update! I was happy to get the board today. As expected, the screen printing text effect is not particularly good. The area is small and there are many texts. It is recommended not to change the area of ​​​​the board to a small size. Furthermore, Jialichuang cannot screen print directly on the fiberglass board? For example, add a top layer of solder mask first, and then add silk screen on top? When I placed the order, I chose the thickness of 0.8, which is easier to bend and deform. If you want to apply patches, you can choose 1.0.

And I learned that I seemed to draw it according to the picture in 2017?

Updated on June 7th! The chips I bought arrived. I bought four pieces and used the soldering iron to dry them directly! Apply a layer of tin to the PCB and do not do any processing to the chip. Roughly align it, then apply tin to the soldering iron, hot-iron the chip directly, and align it. Then it's best to clean it with washing water and tin the surrounding areas. With the board washing water at home, use a scraper to scrape out a little more of the surrounding PCB, then apply tin and solder it. The difficulty lies in applying tin on all sides, and you will succeed after doing it a few times. After welding one piece, I expanded it, and then made another piece. Repeated the same method and it worked! After finishing it thoroughly, I found that the board in my hand smelled good but felt a bit tasteless. The place where the original parts were first welded would protrude. Secondly, I found that my school’s meal card doesn’t seem to be able to use this coil. If it weren't for the fact that the subway card can be used, I would feel that this trip was in vain.

The following is the subway card moving process . 1. Find a good subway card and find the nfc chip. 2. Use physical methods to get the chip out. Here, you first cut it with scissors and then burn it with a lighter . 3. Weld the chip to the pcb.

over! Family photo, 2 tags, 1 subway card

0716 update! I took the subway a few days ago and found that the subway machine could not recognize the card and could not recharge it. As for the turnstile, it should be able to identify it? What is certain is that buses can be used normally. It should be a problem with the coil inductance. If you need to use a counter to recharge, please pay attention to this and check the specifications of their coils. You can currently recharge using your mobile phone. The counter machine cannot be recharged!