A 9-page unplugged STEM lab on mechanical limit switches, Boolean logic gates (AND/OR/NOT), circuit schematics, multi-sensor algorithms, and Mars orbiter case studies.

Introduce physical sensor mechanics, Boolean logic gates (AND/OR/NOT), circuit schematics, multi-sensor vehicle algorithms, and real-world aerospace software failures with Unplugged Robotics & Cyber-STEM Unit 1: Sensor Systems & Conditional Logic Gates! This 9-page printable resource requires zero screens, computers, or expensive electronics kits for students. Designed for a smooth 60- to 75-minute rotation lab using low-cost materials like cardboard strips, brass fasteners, and paper clips.

What Is Included in This 9-Page Pack?

Page 1: Teacher Setup & Master Guide: Master materials checklist, desk map, pre-punched lever arm prep steps, and timing guidelines.

Page 2: Student Answer Sheet (1-Page Master Handout): Single, accountable handout for students to carry from Station 1 through Station 5 on a clipboard.

Page 3: Station 1 Sign (Mechanical Sensor Switch Build Lab): Students construct a mechanical limit switch using cardboard levers and push-pin contacts, testing Normally Open (NO) vs. Normally Closed (NC) physical circuit states.

Page 4: Station 2 Sign (Logic Gate Voltage & Threshold Lab): Students evaluate AND, OR, and NOT Boolean logic gate truth tables and compare analog sensor voltage inputs against digital trigger thresholds.

Page 5: Station 3 Sign (Logic Gate Circuit Schematic): Students draft 2D circuit diagrams linking dual bumper sensors through logic gates to motor shutoffs and explain redundant safety controls.

Page 6: Station 4 Sign (Autonomous Rover Multi-Sensor Algorithm): Students trace a conditional flowchart evaluating front and side distance sensors to direct motor steering angles, reverse navigation, and hazard stops.

Page 7: Station 5 Sign (Real-World Case Study): Students read a technical passage on The 1999 Mars Climate Orbiter Failure, analyzing how mismatched unit data across system interfaces caused a $125-million crash.

Page 8: Detailed Teacher Answer Key: Fully worked truth tables, voltage threshold checks, schematic guidelines, algorithm solutions, and case study answers in plain text.

Page 9: 10-Point Master Grading Rubric: Criteria-specific rubric evaluating every station on a 0-to-2 point scale for fast, objective grading.

Learning Objectives & Alignment:

NGSS MS-ETS1-1, MS-ETS1-2: Engineering Systems & Safety Controls

CSTA 2-AP-10, 2-AP-12: Unplugged Control Algorithms, Boolean Logic, & Sensor Data Processing

CCSS.MATH.PRACTICE.MP1 & MP4: Applied Voltage Threshold Math & Boolean Logic Inputs