×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Opto-Electrical Ciruit Problem

Opto-Electrical Ciruit Problem

Opto-Electrical Ciruit Problem

(OP)
I have an opto-electrical circuit design using an optical transistor OP506A, and an Operational Amplifier TL072. When the Optical-eye is covered (no light goes to the optical eye), positive input (Pin 3) of the TL072 goes to +5V,  then the output of the TL072 is triggered.

The Problem:
        when the Optical eye is covered or darkened continuously (For Example: the device left "ON" in a dark room at  night), the output trigger is repeated continuously. How could I prevent the continuous trigger of the out put?  Could I change my Optical device to a one that trigger once?  Any body has any idea?

I thank you all people in advance.

ARAZ

RE: Opto-Electrical Ciruit Problem

Suggestion: Visit
http://www.angelfire.com/la/unisourcemarketing/
http://www.neumueller.com/optek/photosen.htm
http://www.optekinc.com/photosen.htm
http://focus.ti.com/docs/prod/productfolder.jhtml?genericPartNumber=TL072
http://members.nbci.com/Jon_Risch/catch-1.htm
http://www.ti.com/sc/docs/msp/tools/macromod.htm
for more info. Why is TL072, Dual Low-Noise JFET-Input General-Purpose Operational Amplifier applied? It has more complex internal circuitry. Would not a Single Low-Noise JFET do? Also, it may need a new optical transistor and to verify its characteristics in the design circuit.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources