[Pin header memory] 32Byte memory

The first version, electric soldering iron, soldering version: 64Byte-ROM open source - Lichuang EDA open source hardware platform (oshwhub.com)
is currently the second version, a single board stores 32 bytes, two boards can be directly cascaded, 64 bytes . More cascades require the introduction of 74HC138.
Currently, PCB can be SMT patched, and all 5 pieces are patched for 65 RMB (only diodes and resistors are patched, and SMT boot coupons are used).
Then you need to bring your own pin headers, which consumes a lot of money. There are also skills in welding pin headers, and I will share the following production tutorials.
Of course, shorting caps are also indispensable, so it is recommended to buy more.
The first version of the demonstration video: memory programmed with an electric soldering iron_bilibili_bilibili
The second version of the design video: [PCB design] 32Byte programmable memory_bilibili_bilibili
SMT patch demonstration: SMT proofing demonstration (using JLC)_bilibili_bilibili
second version demonstration video: Where did the video go? _bilibili_bilibili
should release a production tutorial video in the future:
a few real pictures