Lesson 1: The Physics of the Solder Joint (Practice Kit)
Duration of Days: 3
Lesson Objective
Students will demonstrate the ability to create mechanically sound and electrically conductive joints on a non-critical practice PCB or wire-wrap.
Why is soldering considered a "molecular bond" rather than just "glue for metal"?
How does "tinning" the iron improve heat transfer?
Wetting: The ability of liquid solder to flow and bond to the copper surface.
Cold Solder Joint: A faulty joint caused by insufficient heat, characterized by a dull, grainy appearance and poor conductivity.
Solder Bridge: An accidental connection between two adjacent tracks on a circuit board.
ITEEA STEL-7R: Apply a broad range of making and troubleshooting skills.
NGSS HS-PS3-3: Design and build a device that converts one form of energy into another (Electrical to Thermal).
Description: Students use practice kits (blinking LED kits or simple copper pads) to master the "Heat the Work, Not the Solder" technique.
Purpose: To build muscle memory and tool safety before working on expensive ROV components.
DOK Level: Level 2 (Skill/Concept). Students are applying a specific set of rules to achieve a physical result. They must observe their work and "classify" their joints as successful or failures based on visual criteria.
In this course, we recognize that students enter the lab with varying levels of technical experience. Our differentiation strategy employs a 'Scaffolded Autonomy' approach. We provide structured, step-by-step guidance for foundational concepts while offering open-ended, 'Design Challenge' extensions for advanced learners. By utilizing peer-mentorship models, diverse instructional media (visual, tactile, and digital), and flexible project pathways, we ensure every student can move from consumer to creator at their own pace.
The Visual Audit: Students submit their practice board. Each joint is graded on a 3-point scale: 1 (Cold/Incomplete), 2 (Overheated/Lifted Pad), 3 (Ideal/Concave/Shiny).