Ultrasonic Collision Detection icon Ultrasonic Collision Detection — Stops robot movement (no steering) when an EZB-connected ultrasonic sensor detects an object within a set range; integrates with scripting and paused polling. Try it →
Tutorial
United Kingdom
YouTube
Published — Updated
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Steps

  1. Parts Needed.
  2. Schematics.
  3. Step 1. Method:
  4. Step 2.
  5. Step 3.
  6. Step 4.
  7. Step 5.
  8. Step 6.
  9. Step 7.
  10. Step 8.
  11. Step 9.
  12. Final Step.

Tip120 & Tip122 Transistor Switching Circuit

Step 9 of 12
Step 7.

Adding the Diode.

If using the circuit for a motor or other inductive load a diode needs adding between the transistor Collector and Emitter. This is easily added in to the previous circuit.

11.) Bend the leg on the Diode so it will fit though 0.1" hole spacing

User-inserted image

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