Spike Prime - Entrance Lock

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Let's begin

Learning...

Build

Model:

Pictures:

Building instructions:

• Entrance lock (PNG)

Download building instructions:

• whole system (pdf)

Download stud.io model:

• entrance lock (stud.io)

...description...

Connections:

• bottom motor - C
• top motor - E
• large motor D
• light sensor - B

Programs

First run the following program to analyze the sensor readings in your light conditions:

Then run the following program to analyze the gaps of your line pattern on entrance card:

Finally, this is the main program for the entrance lock:

Download:

• lock_analyze_sensor.llsp - analyze sensor
• lock_analyze_gaps.llsp - analyze gaps
• lock_unlock.llsp - main program

...description...

Measure, analyze, think

• Make your own recording

• Perform measurements with your model and discuss in your group what has happened.

Explore and modify

• Number systems...

Present

• How does robot encode the line pattern to the number shown?
• Have you proposed another encoding?
• Compare the efficiency of the encodings.
• How difficult it is to decode each of them?
• How big numbers could you encode into pattern if it had 10 lines?

Additional resources

• Download: Entrance lock - all media files