Ultrasonic Bot

A version of the base robot that uses an HC-SR04 ultrasonic "ping" sensor for distance.

Source book: STEM Robots
Kit page: https://dmccreary.github.io/stem-robots/kits/ultrasonic-bot/
Printable one-pager: ultrasonic-bot-one-pager.html

Features

• Lab: Ultrasonic Ping Sensor Lab

Benefits

• Free, open lessons: the STEM Robots textbook has the kit page, wiring, and MicroPython code.
• Real-world data: students read sensors and turn measurements into decisions.
• Budget: about $20 (base robot $19 plus an HC-SR04 sensor about $1).

Parts

• Cytron Maker Pi RP2040 ($10) — Controller board (built-in RP2040)
• HC-SR04 Ultrasonic Sensor — Sensor
• Piezo Buzzer / Speaker — Sound output
• 830-Point Breadboard ($1.10) — Breadboard
• Micro-USB Data Cable ($2.50) — Power and programming cable