176985602337900

Find freelancers. Lose those costly delays.

With 1.7 million freelancers, we'll match you with the perfect talent.

or, Register with Elance »

Circuit design
Sign in to Add to Watch List

Engineering & Manufacturing > Electrical

View Change History

The client has made the following changes to the job.

Description
Date
Close

Job Description

  |  Change History >>

Updated

Close
  • Posted: Sun, Apr 18, 2010
  • Time Left: Closed
  • Location: Anywhere
  • Client prefers freelancers from:
    Anywhere

    You are still able to submit a proposal for this job.

    The client prefers freelancers from
    a different location.

    You're still able to submit a proposal for this job, regardless of your location.
  • Start: Immediately
  • Budget: Less than $500
  • Fixed Price Job
  • Elance Escrow Protection
  • W9 Not Required
Sign in to view client's details

We require the design of a circuit that meets the following conditions for installation along a 20' length of pipe:

Given 2 LEDs, a red one and a green one mounted at the beginning of the pipe & 3 IR emitter/detector pairs (sensor 1, sensor 2, sensor 3) mounted along a 20' length of pipe will be that will detect the passage of on object. An object is inserted into the pipe and Sensor 1 changes the LED from green to red. If the object is moving fast enough, Sensor 2 will activate the green LED again, if not, it will wait until Sensor 3 tells the system that the object has exited the other end. System must be waterproof/resistant.

Operation description:

The green LED will be on by default. Once a ball is inserted into the pipe and detected by Sensor 1, the green LED will go off, and the RED one will come on, instructing no other objects to be inserted into the pipe.

The ball will travel down the pipe until it passes Sensor 2. Sensor two will determine the time take...

Sign in or Register to see more

Job ID: 19724884
 
Proposals
Avg $ | High $ | Low $ — Show Pricing
  • Submit Date (Latest)

 New Zealand  |  
Skills: - C programming, delphi, visual basic. - Electronics hardware design. - Motor drive H/ware & S/Ware design - Software design for embedded...
1
  |  
 0.0   |  $300 Earnings   |  1 Jobs
Bid ID: 19845639  |  Submitted: Apr 30, 2010 15:46 ET 
Proposal SEALED

slidesDesigner      
One or more team members at  are verified.  Learn More
 Sri Lanka  |  
" slidesDesigner " mainly design presentation materials – PowerPoint, Keynote, SlidesShare or Prezi – that help you win big and set you apart from...
1
  |  
 0.0   |  Private   |  0 Jobs
Bid ID: 19839122  |  Submitted: Apr 30, 2010 01:23 ET 
Proposal SEALED

 United States  |  
Electrical engineering services, including PCB design and prototyping. Test fixtures, rack mount modules, on-site engineering services.
1
  |  
 5.0   |  $475 Earnings   |  1 Jobs
Bid ID: 19815849  |  Submitted: Apr 27, 2010 17:19 ET 
Proposal SEALED

 Bangladesh  |  
Humanoid Robot - ICARUS - June’09 to date RoboCup ( www.robocup.org ) 2009 and 2011 Qualifier. • ‘Icarus’ is a humanoid robot which has the...
1
  |  
 0.0   |  $20 Earnings   |  0 Jobs
Bid ID: 19804588  |  Submitted: Apr 26, 2010 17:39 ET 
Proposal SEALED

 United States  |  
Over 15years of experience in mixed signal, high speed digital design. Signal conditioning to analog sensors. Motor (brushless, standard) drives...
1
  |  
 4.9   |  Private   |  1 Jobs
Bid ID: 19794753  |  Submitted: Apr 25, 2010 22:33 ET 
Proposal SEALED

 United States  |  
A seasoned professional, engineering experience dates from 1973.
1
  |  
 0.0   |  $0 Earnings   |  0 Jobs
Bid ID: 19759103  |  Submitted: Apr 21, 2010 13:19 ET 
Proposal SEALED

 Turkey  |  
Hardware design engineer,experience on motor control, smps, battery charger, analog design, DSPimplementation with c complier, writing many codes...
1
  |  
 0.0   |  $216 Earnings   |  1 Jobs
Bid ID: 19741934  |  Submitted: Apr 20, 2010 02:03 ET 
Proposal SEALED

 United States  |  
The following is a list of services offered: Embedded ARM processor programming and support Windows CE 6 programming and support for Embedded...
1
  |  
 0.0   |  Private   |  1 Jobs
Bid ID: 19738757  |  Submitted: Apr 19, 2010 17:21 ET 
Proposal SEALED

 Singapore  |  
Electronics engineer with over 6 years experience in development environment. Hands on experience in digital and analog circuit design,...
1
  |  
 5.0   |  Private   |  1 Jobs
Bid ID: 19725472  |  Submitted: Apr 18, 2010 06:48 ET 
Proposal SEALED

 Australia  |  
Embedded systems design; Hardware and electronic circuits design; Professional PCB design; Low level programming (Assembler and embedded C);...
4
  |  
 5.0   |  Private   |  1 Jobs   |  1 verified credential(s)
Bid ID: 19725277  |  Submitted: Apr 18, 2010 05:43 ET 
Proposal SEALED
Elance is now an Upwork company.
Upwork is the choise of 4M+ clients. Get started working on Upwork today.
Are you ready to post a job like this one?
Post a Similar Job »