In Progress

ambient light sensor with a USB interface

This project was previously posted as "ambient light sensor through a USB interface" with a budget from $750 through $1500. This work can be done for under $750.

Interface a solid-state ambient light sensor to the USB port of the computer. Provide readings of ambient light with one C function.

1. Hardware – There are 3 choices of hardware.

1.1. EVAL.BH1721FVC-ND manufactured by Rohm and resold by DigiKey:

[url removed, login to view]

1.2. Identify similar hardware available from another manufacturer meeting the specifications of 1.3.1.

1.3. Design your own hardware using any resource available:

1.3.1. Meet the following specifications: Provide a 4+ bit reading of ambient light in the range from full darkness to full noon sunlight. The circuit must not exceed the dimensions 5cm x 3cm x 1cm Interface to a computer through a USB port.

1.3.2. Deliver the following items: Schematic diagram PCB board layout files Bill of materials One working prototype

2. Software

2.1. Regardless of the choice of hardware, the software must initialize the hardware if necessary.

2.2. Supply an ambient light reading with one function call, such as readAmbientLight().

2.3. Software will be written in C

2.4. Software will run on the Linux operating system

3. Development schedule

3.1. One-page progress reports must be provided every two weeks.

3.2. The work must be completed within 12 weeks of the first payment.

3.3. All design files will be provided upon payment of every installment.

4. Payments

4.1. The payments will be made in 4 installments of 25% of the total contracted price.

4.2. Sufficient progress toward completion must be demonstrated to earn each installment.

5. Bidding

5.1. Bidders must show examples of previous work.

5.2. Bidders with positive reviews will be favored.

5.3. Bidders must identify which of the 3 hardware choices they will pursue.

2/25/2013 updated section 5. Bidding in the specification

Skills: C Programming, Electrical Engineering, Electronics, Linux

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About the Employer:
( 1 review ) New York, United States

Project ID: #4275447

Awarded to:


I choose option 3 because I have previously work with AC and DC power managment. Also, PIC-USB interfaces are within my reach. This will give a low-cost and high-quality device, ready in less time than expected!

$550 USD in 30 days
(1 Review)

19 freelancers are bidding on average $760 for this job


I can do this .. very easy project for me

$750 USD in 30 days
(30 Reviews)

hi, i am an electrical engineer and an embedded system developer. i can help you with this project. i will using the usb connection which will simulate the virtual COM port and data will be received on the PC terminal More

$1200 USD in 25 days
(39 Reviews)

Hi, We can provide you with the required solution. We've previously developed this kind of boards. Kindly check PM for details. Thanks!

$750 USD in 30 days
(7 Reviews)

Hi, I am MSc in Electronics and has vast experience of doing such project. I will use 1st choice (EVAL.BH1721FVC-ND manufactured by Rohm and resold by DigiKey) for hardware to reduce development time and time to market More

$700 USD in 30 days
(17 Reviews)

Hi i can help you, see portfolio for samples of works

$750 USD in 15 days
(14 Reviews)

Dear Sir, We are Reserach and Development company whose working area are : -Digital Motor Control -Analog Design -Electronic Design -Power Electronics -PCB design -Embedded system -Matlab -Simulation of ha More

$600 USD in 12 days
(13 Reviews)

hello Prasad here..

$750 USD in 30 days
(8 Reviews)

Hi, Quality design solution with on-time delivery guaranteed if offered. Please see my PM too. Thanks.

$650 USD in 60 days
(6 Reviews)

Hello, We are embedded engineers with sufficient amount of experience over developing applications for Linux based targets. More details of the bid are sent to your mailbox. Thanks.

$750 USD in 75 days
(7 Reviews)

Hi there, I have a PhD (doctorate degree) and have an academic position.

$1500 USD in 30 days
(8 Reviews)

Hi ! I re-post my bid here. PLease read the PM

$850 USD in 20 days
(1 Review)

We are specialized in sensors development, with high skills in electronics, optics and physics. Our portfolio includes high speed optic detectors, high speed chronographs, optic stimulus for in-lab sensor tests, USB do More

$850 USD in 30 days
(1 Review)

i can make it done for u. check pm.

$750 USD in 10 days
(2 Reviews)

Hi, i can help you please check your PMB

$740 USD in 30 days
(2 Reviews)

I can provide this solution for you.

$750 USD in 15 days
(1 Review)

I would go with third option, designing own HW, and delivering appropriate Linux device driver, of course. The prototype sent to your address is NOT included in the price. Check PM for some details about my approach.

$750 USD in 60 days
(0 Reviews)

>>>>Get it done now<<<<< I will complete this with 100% [url removed, login to view] will be submitted under [url removed, login to view] have a team of 4 people working on [url removed, login to view] forward for your positive response. Thanks and Regards Karan

$700 USD in 15 days
(0 Reviews)

Design option 3. I have a lot of experience of USB interfacing from PC to Microcontrollers.

$750 USD in 40 days
(0 Reviews)

dear john, please see the pm.

$800 USD in 90 days
(0 Reviews)

Experts in microcontrollers.

$600 USD in 20 days
(0 Reviews)