09 Ago 1 Set DIY SMD SMT Welding Practice Soldering Skill Training Board NE555 CD4017
☆ Welcome☆ to ☆ my ☆ shop ☆ PCB blank board Size: 80mm x 60mmThe circular circuit is the running water lamp circuit, which is composed of CD4017, NE555 and leds, which can be used to work after being welded.Add 2pcs of QFP44 chip, double...