Sensor Setup: Touch to Light, Buy & Cost, Cheap Price

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Discussion Overview

The discussion focuses on setting up a touch sensor circuit that activates a light bulb when touched and deactivates when released. Participants explore options for sensors, their costs, and the feasibility of the setup, emphasizing the need for a compact and inexpensive solution.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested, Homework-related

Main Points Raised

  • One participant describes a desired setup where a touch sensor controls a circuit to light a bulb, emphasizing the need for a small and cheap sensor.
  • Another participant suggests a capacitive touch sensor as a suitable option, noting its relative affordability and simplicity, while also mentioning the variety of touch-sensitive equipment available in the market.
  • A follow-up question is raised regarding the minimum force required for the suggested sensor to operate effectively.
  • A response clarifies that capacitive sensors do not require physical pressure to operate, as they detect the presence of a finger electrically.

Areas of Agreement / Disagreement

Participants generally agree on the suitability of capacitive touch sensors for the proposed setup, but there is some uncertainty regarding the operational requirements, specifically concerning force versus electrical detection.

Contextual Notes

Limitations include the lack of specific details on the exact models of sensors, their costs, and the potential variations in performance based on different conditions or setups.

Who May Find This Useful

Individuals interested in DIY electronics, particularly those looking to implement touch-sensitive controls in their projects.

anubodh
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I want such a setup that when i touch the sensor, a circuit (including batteries) kept at a distance of less than 6 m gets complete and the bulb lights up and when i leave the finger from sensor the circuit breakes and the bulb stops glowing. i.e. the switch of the circuit in in the control of my hand.The sensor should be as small as possible.
I wanted to ask which sensor should i buy and how much it would cost and how can i prepare such a setup.(the sensor should be as cheap as possible)
 
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Your best option here would be a capacitive touch sensor which can be miniature relatively cheap and simple to use or the more robust options available out there can get quite expensive ...

The market of touch sensitive equipment, buttons sensors is quite large and come in many forms and working solutions but as above I think that's one to look into first.

Check this link out ...I found it within 30s so I'm sure with a little more time you can source a set-up more tailored to your needs.http://www.inmotion.pt/store/standalone-momentary-capacitive-touch-sensor-breakout-at42qt101
 
Thanks.
How much minimum force can a relatively cheap sensor (like the one you told) need for working.
 
Read the link I posted it explains ... you don't apply force as such to operate it, it uses the presence of your finger which is electrically detected not detected by physically pressure.
 
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