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Design a circuit board

$300-1500 USD

Cancelled
Posted over 16 years ago

$300-1500 USD

Paid on delivery
Hi I am looking for someone to design a 4 min digital sound/music unit that can be attached to a telephone pabx system with repeated play and the sound files must be able to be changed via a telephone line into the unit. Can anyone help with this. Thanks
Project ID: 186590

About the project

10 proposals
Remote project
Active 17 yrs ago

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10 freelancers are bidding on average $1,111 USD for this job
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Hi there, please see the PM. Thanks.
$1,300 USD in 28 days
4.9 (4 reviews)
5.0
5.0
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Dear Sirs, I am an electronic engineer based in Bulgaria/Europe. I have experience handling electronic devices projects over GAF. On PMB you can check samples of my previous work. The board you request by my opinion should follow some basic steps: 1. Clearing the design of the schematic capture 2. Reaching an adequate solution to your needs 3. Clarifying the parts list according to your manufacture facility stock availabilities. Digging on suppliers list for parts. 4. Board design considerations 5. PCB layout and routing 6. Software design requrements 7. Final solution testing We can start with step 1 above and then I can say some adequate time schedule we can both accept. I can say I need ~50hours for step 1 and 2; ~10h for step 3; ~60h for steps 4,5; ~80h for 6,7 So roughly ~200 hours of work +max 10% over for details that I cannot predict at this stage. My expected hourly pay off is $6. The microcontrollers I use are Texas MSP430 series and Microchip PICs. However I suggest that we rely on this project on some MSP430 uC. Basicly the schematic design I suggest involves uC with integrated opAmp for impedance adjustment of the input and with integrated ADC,DAC,SPI; additionaly external Flash memory with SPI will take place. Regards Venelin Vasilev
$1,000 USD in 1 day
4.9 (10 reviews)
4.4
4.4
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this is a with a microcontroller based solid state recording/playback device with a telephone line interface,to be powered from the epabx. power supply,12V-24V DC,recording can be done from internal microphone or through the telephone line. Details of the interface/features must be given. The job consists of hardware,pcb and firmware design.
$1,300 USD in 30 days
5.0 (3 reviews)
3.0
3.0
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With two prototypes. Please Check PM for explanation. Thanks.
$1,434 USD in 60 days
5.0 (1 review)
1.2
1.2
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I like to give you a Complete Customise solution base on your requirement.
$1,300 USD in 60 days
0.0 (0 reviews)
0.0
0.0
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I make for you complete project based on atmel doc1456 (you must see) or any other system on your requirement.
$800 USD in 30 days
0.0 (0 reviews)
0.0
0.0
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I am ready to do this project
$1,300 USD in 25 days
0.0 (0 reviews)
0.0
0.0
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i agree to bid project
$1,400 USD in 7 days
0.0 (0 reviews)
0.0
0.0
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Can be done!
$777 USD in 30 days
0.0 (0 reviews)
2.4
2.4

About the client

Flag of SOUTH AFRICA
Cape Town, South Africa
5.0
7
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Member since Oct 16, 2007

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