Recently, I have been learning the C language of MCU. Ever since I watched the movie "Super Chapai", I have always wanted to imitate the USB key inside. So I recently researched and made such a thing. I learned from this work. Many things step 1: Use 24C08 to store the password, and then use the single-chip microcomputer to read it, and compare whether the password is consistent or not. Considering the aesthetic problem, this IC is packaged in a USB plug, so you must first remove a USB plug and remove the inner core Step 2: Complete package measurement with ordinary scale Step 3: Use the thermal transfer method to make a PCB and print it with a laser printer Step 4: Step 5: Iron heating Step 6: The transfer effect is still good Step 7: Corrosion (the blue environmentally friendly corrosive purchased on the TB used, some people say it is sodium persulfate, I am not sure) Step 8: Step 9: Cut to shape Step 10: Solder the required originals (to avoid oxidation of the USB contacts, it needs to be tinned and then polished) Step 11: Into the USB head, just right Step 12: Step 13: Fill the internal space with hot melt glue Step 14: Find a plastic cover to put it on, it looks more beautiful Step 15: Step 16: Bonding inside Step 17: Finished product Ningbo Autrends International Trade Co.,Ltd. , https://www.supervapebar.com
