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Buyer Summary:
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1 posted 0 paid |
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| Location: |
Anchorage, AK, United States
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| Member Since: |
December 18, 2008 |
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Description
Modify an existing circuit design and electronic code to be more robust.
DC supply of 24vdc +/- 50v Powering a PIC chip that has a square wave signal input 0-125hz from an open collector hall effect transistor that has 5-24vdc 12vdc nom input from the circuit board.
When the frequency reaches 17hz for 4 seconds turn on a relay and led and wait 1 hour then turn the relay off. If 17hz is reached for 4 seconds again reset timer. Rough source code attached.
A current circuit design will be attached as well. Items to be added to the design will be 1. Some lighting protection 2. Reverse polarity protection 3. Different Voltage regulator setup to facilitate operation of the circuit below 50vdc 4. Current limit of 3a to the relay controlled dc output.
Product will include a cad drawn schematic, new parts list, and new source code. If I am missing anything important please pm me.
Additional information:
Submitted on 12/18/2008 at 21:49 EST
The dc supply voltage is 24vdc nominal and never more than 50vdc.
Additional information:
Submitted on 12/18/2008 at 22:02 EST
Attached are the component descriptions for the circuit diagram.
Additional information:
Submitted on 12/19/2008 at 15:23 EST
Here is all the data for my project.
Reminder
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Dhaka,
BD
location |
US$1,000
bid amount
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(36
reviews)
feedback |
45 day(s)
delivery time |

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Can be done. I have a B.Sc. on EEE. I can solve your problems. Circuit design will be optimal.
Bid Time: 12-19-2008 04:16
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Kathmandu,
NP
location |
US$1,000
bid amount
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(5
reviews)
feedback |
7 day(s)
delivery time |

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Hi,Check Pm please,thank you.
Bid Time: 12-19-2008 08:36
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Chennai,
IN
location |
US$1,000
bid amount
|

(No Feedback
Yet)
feedback |
30 day(s)
delivery time |

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Please check our PM & our profile
Bid Time: 12-20-2008 08:13
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Kharkov,
UA
location |
US$600
bid amount
|

         
(1
reviews)
feedback |
40 day(s)
delivery time |

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Please see PM
Bid Time: 12-19-2008 03:22
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Chennai,
IN
location |
US$850
bid amount
|

         
(1
reviews)
feedback |
40 day(s)
delivery time |

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Dear Sir,
Kindly refer to your PM for more details.
Thanks & Regards,
SANDS Team.
Bid Time: 12-27-2008 01:48
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Delhi,
IN
location |
US$1,000
bid amount
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(No Feedback
Yet)
feedback |
30 day(s)
delivery time |

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We are into this embedded domain for last 10+ yrs and have an expertise in PIc/AVR/51/ARM architecture.
So can do this project and within the time frame and deliver the quality work.
So just confirm us in order to start the things.
Bid Time: 12-19-2008 01:33
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Aarhus,
DK
location |
US$1,000
bid amount
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(No Feedback
Yet)
feedback |
15 day(s)
delivery time |

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Hello, we are the company with 5 programmers, who have different skills in modern web-programming, and we are interesting to work with your project and we are sure that we can complete it perfectly
Bid Time: 12-19-2008 04:28
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bangalore,
IN
location |
US$500
bid amount
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(No Feedback
Yet)
feedback |
30 day(s)
delivery time |

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hi,
we are from INTAGLIO SYSTEMS,BANGALORE INDIA.And we are known for our optimization and economic reliablity.Our team has 5+ experienced engineers in microcontroller field
Bid Time: 12-19-2008 07:04
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Szentes,
HU
location |
US$700
bid amount
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(No Feedback
Yet)
feedback |
21 day(s)
delivery time |

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Hello, we have 6 yrs experience in Microchip PIC based embedded systems.
We make for you the schematic, pcb layout with CAM files and firmware software.
Best regards, EMCOR-MED team!
Bid Time: 12-19-2008 09:55
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Islamabad,
PK
location |
US$450
bid amount
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(No Feedback
Yet)
feedback |
18 day(s)
delivery time |

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Please see PM
Bid Time: 12-21-2008 08:45
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Havant,
GB
location |
US$800
bid amount
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(No Feedback
Yet)
feedback |
12 day(s)
delivery time |

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I have extensive experience of Embedded system hardware and firmware design, development and integrated testing spanning different platforms including MSP, PIC, 8051. I can do complete system design including hardware design, schematic entry, PCB layout, Firmware development and Integrated testing for this project. Please see PM for details
Bid Time: 12-21-2008 15:35
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New Delhi,
IN
location |
US$800
bid amount
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(No Feedback
Yet)
feedback |
45 day(s)
delivery time |

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Hello dear Sir/maam
We are GMASS Pvt Ltd..working in various domains and we can deal with this project by the said time according to ur need.
you can also visit out website and can also be found some live projects we are working on.
thanx.
Arvin Parwal
HR,
GMASS Pvt Ltd.
Bid Time: 12-22-2008 01:05
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Hyderabad,
IN
location |
US$690
bid amount
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(No Feedback
Yet)
feedback |
20 day(s)
delivery time |

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We are a company having expertice in design and development of electronics from last 4 years we have good expertice working in designs based on 8 bit, 16 bit amd 32 bit microcontrollers and processors and also we have lot of experieance in Xilinks FPGA nad Tigersharc dsps. Based on your requirement we will design and develop firm ware for this with in 20 Dyas.
Bid Time: 12-23-2008 02:15
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Bangalore,
IN
location |
US$500
bid amount
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(No Feedback
Yet)
feedback |
30 day(s)
delivery time |

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I am Electronics engineer having 9 years of experience high-speed processor based boards design, testing. I have done many projects successfully in telecom/datacom, embedded projects from specifications phase to proto development and testing phase. Currently also we are handling 2 different medium complex projects (4-layers PCBs, 40Mhz speed). We have PIC micro controllers reference board also. I understood your project specifications, and i can do very efficiently. please contact for further discussion.
Bid Time: 12-22-2008 12:38
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new york,
IT
location |
US$301
bid amount
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(No Feedback
Yet)
feedback |
12 day(s)
delivery time |

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i can do it ..........
Bid Time: 12-23-2008 00:17
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Kolkatta,
IN
location |
US$300
bid amount
|

(No Feedback
Yet)
feedback |
15 day(s)
delivery time |

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Grey matter system is in Designing and Developing Electronic Modules for clients,throughout the world.It has a team of Experienced Electonics Engineer ,Software Engineer and Mechanical Engineers.
It would be great if we can set up a call to discuss the project in more details.
Bid Time: 12-26-2008 06:15
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lahore,
PK
location |
US$850
bid amount
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(No Feedback
Yet)
feedback |
20 day(s)
delivery time |

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Hi!
Let me do this work.
Release payment when you 100% satisfied.
We believe on client's 100% satisfaction.
we have the team of engineers who have done more than 3000 projects of this kind.
Bid Time: 12-26-2008 16:16
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Blagoevgrad,
BG
location |
US$850
bid amount
|

(No Feedback
Yet)
feedback |
35 day(s)
delivery time |

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We are a company having expertice in design and development of electronics .We have good expertice working in designs based on PIC and AVR microcontrollers. Based on your requirement we will design and develop firmware for this with in 35 Dyas.
Bid Time: 12-28-2008 03:35
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Hanoi,
VN
location |
US$1,000
bid amount
|

(No Feedback
Yet)
feedback |
28 day(s)
delivery time |

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Dear, I can be well done this project for you. Please check your PM
Bid Time: 12-29-2008 03:17
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Karaj,
IR
location |
US$300
bid amount
|

(No Feedback
Yet)
feedback |
10 day(s)
delivery time |

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I'm a professional in uControllers. Read my profile and my PM please.
thanks.
Bid Time: 12-29-2008 17:25
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Richmond Virginia,
US
location |
US$1,000
bid amount
|

(No Feedback
Yet)
feedback |
21 day(s)
delivery time |

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I would like to Build this device. The device robustness will improve (> 200% estimate) because of following improvements. It will have a schmitt trigger added between the Hall Effect Anemometer (0-125 Hz) and PIC16F684. Also the PIC16F684 software will be written to include interrupts for the counter of 17 Hz such that if the input frequency is above that it will not waste timeout period of four seconds. Another improve will be to have a 10 Millisecond timer to sample the incoming frequency. The PIC16F684 clock will be set to run at 8 MHz to improve system response. Once 17 CPS has been sampled for four seconds the power relay will be energized and the PIC16F684 will power down for 1 hour to conserve power. Upon 1 hour timeout the PIC16F684 will wake up and repeat the 17 Hz sampling in 4 second period window. A 5 VDC (78L05) regulator will be changed to accommodate lower input power of 40 VDC. A reverse polarity device will be added to protect against hooking up incoming power in reverse manner. A lighting surge device will be placed between incoming unregulated power and the output of the 5 VDC regulator. This should add about 15 Kv ESD protection. Delivery of CAD drawn schematic(s), Bill of material(s) of parts from major manufactures (DIGI KEY, JAMCO electronics and others) and all source code will be provided 21 days upon bid award. Payment of 50% + getacoder fee (approx $100) upon bid award shall be due. Remaining payment due when device is received by Project Creator RabidRhino. Thank you, CPU8052
Bid Time: 12-29-2008 17:30
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Islamabad,
PK
location |
US$1,000
bid amount
|

(No Feedback
Yet)
feedback |
30 day(s)
delivery time |

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Hello,
We can deliver high quality results to your complete satisfaction, along with 90 days of warranty upon the delivery of the final version of our product.
Please check your PMB for further details.
Best regards,
Waqar Ahmed Pasha,
Business Development Manager,
Arkotech Corporation
Bid Time: 01-02-2009 06:46
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