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Simple sine wave generating circuit using 555, op amp or similar
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Engineering & Manufacturing > Electrical

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The client has made the following changes to the job.


Job opened to all freelancers. Previously: Invite only

Feb 6, 2014

Job awarded.

Jan 30, 2014

Job awarded.

Jan 29, 2014

Job awarded.

Jan 29, 2014

Job awarded.

Jan 29, 2014

Attachment added: jackSensor2.mp3, jackSensor.mp3

Jan 27, 2014

Job Description

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  • Posted: Sat, Jan 25, 2014
  • Time Left: Closed
  • Location: Anywhere
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  • Start: Immediately
  • Budget: Not Sure
  • Fixed Price Job
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I'm looking to hire someone who can prototype a device for me. It's not going to be micro controller-based, but rather designed with basic IC building blocks like the 555, op amps, low-pass filters, etc. The idea is to build a VCO theremin-like circuit capable of taking input from a variety of interchangeable resistive and voltage analog sensors such as photocells and FSRs as well as piezo, conductive rubber, and also powered sensors with voltage outputs like the Sharp IR distance rangers., The output needs to be a clean pure sinewave with minimal overtones. Must be battery powered, using AA or AAA cells.

Input should be a range of sensors so I can attach either resistive sensors such as photocells or voltage sensors such as IR distance ranger.

Output should be audible frequency range, varying with the resistance or voltage of the various sensors that can be attached to the device.

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Job ID: 52205971
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