Mounting a small ultrasonic sensor to a continuous rotation servo

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Discussion Overview

The discussion revolves around the mounting of a small ultrasonic sensor on a continuous rotation servo, focusing on methods to avoid wire tangling and common practices for securing electronics in rotating systems. The context includes practical solutions and considerations for hobbyist electronics projects.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant suggests using slip rings as a potential solution for wire management in rotating applications.
  • Another proposes the use of a rotary transformer to address the issue of power and signal transmission.
  • There is a suggestion to consider battery power combined with Bluetooth Low Energy (BLE) for data transmission, which could eliminate the need for wires altogether.
  • A participant mentions that rotary transformers, commonly found in old VCRs, might not be suitable for the ultrasonic sensor's frequency but notes that multiple windings could be configured for better performance.
  • Another idea is to mount the ultrasonic transducer facing vertically and use a reflective shape that rotates with the servo to direct the ultrasonic waves sideways.

Areas of Agreement / Disagreement

Participants present multiple competing views on how to effectively mount the sensor and manage wiring, with no consensus on a single best solution. Various methods are proposed, each with its own considerations and potential limitations.

Contextual Notes

Some suggestions depend on specific technical requirements, such as frequency response and the physical arrangement of components, which may not be fully resolved in the discussion.

Jae
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I'm an Arduino electronics hobbyist I'm not a professional electrical engineer.

How would I mount a small ultrasonic sensor on a continuous rotation servo, without tangling the wires? How would I fix this problem easily and what's the most common way to mount electronics in a rotating object?

Sensor: https://www.amazon.com/gp/product/B008U13URQ/?tag=pfamazon01-20

Thank you for your time.
 
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Rotary transformer might solve your issue.
 
Or battery power and Bluetooth Low Energy (BLE) to link the data...
 
Rotary transformers can be found in old VCRs. They coupled the spinning video head to the signal processing section. I wouldn't guess that a single winding would have sufficient magnetizing inductance for your frequency, but many of these had four windings that could be jumped in series for a much lower frequency response.
You might also mount the transducer facing up (or down), and use a reflective shape that is spinning on the servo to direct it sideways.
 
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