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Reddit mentions of HC–SR04 Ultrasonic Sensor - 2 Pack

Sentiment score: 1
Reddit mentions: 1

We found 1 Reddit mentions of HC–SR04 Ultrasonic Sensor - 2 Pack. Here are the top ones.

HC–SR04 Ultrasonic Sensor - 2 Pack
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    Features:
  • Range: 2cm - 400cm
  • Power: +5V DC Current: 15mA
  • Effective Angle: <15 degrees
  • Dimension: 45mm x 20mm x 15mm
  • Trigger Input Pulse Width: 10uS
Specs:
Height0.8 Inches
Length1.75 Inches
Number of items3
Width0.5 Inches
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Found 1 comment on HC–SR04 Ultrasonic Sensor - 2 Pack:

u/schorhr · 2 pointsr/arduino

Hello :-)

You can use a simple (leaver) switch when it bumps into something (or indeed use the flex sensor), but better would be a ultra-sonic sensor ($1 at Aliexpress or eBay, $5 at Amazon). Another method is something like a tcrt5000 infrared distance sensor, but it's vulnerable to ambient light. You could do this with the photocell as well (or line tracking).