This is what the fully assembled How to Solder Kit looks like. Depress the button and one of the LEDs will remain lit at the end (it eventually times out). You can add some kind of template so each LED position has some meaning.
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Company: BEST Inc.
BEST is a certified master IPC Training and Solder Certification center. We provide comprehensive courses for both Instructors and Operators including IPC-A-610, IPC J-STD-001, IPC-A-600, IPC/WHMA-A-620, and IPC 7711/7721 standard