Electronic Circuit Design

$1000-5000 AUD

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περίπου 8 χρόνια πριν

$1000-5000 AUD

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We require a digital PCM bus interface capable of detecting single frequency audio tones, and, sending DTMF tones. The idea is that the PCM device makes a GSM type phone call (this is the master PCM/DVI device). The device you will create or have in your design library will allow us to detect tones on the RX audio channel, and send DTMF tones on the TX channel. Similar to a basic modem call something like this: RX 100mS 1400Hz TX DTMF TONES x 16 at 100mS on/off RX 750mS 2300Hz Notes: Currently we use a 16 bit uLaw PCM (DVI) bus from the Telit HE910 (could change to linear PCM if required). The design must be able to detect 1400Hz and 2300Hz audui tones down to 100mS precision. We must also be able to generate DTMF tones (send DTMF tones on the voice channel) down to 10mS i.e. 100mS on/off. The current PCM bus is programmed to run at 512Khz, 16 bit uLaw, 1 x TX channel, 1x RX channel is used. The circuit cost must be under USD$10 Design cost must be under USD$5000, if this is something you have in your design library then customising it for us should not be a problem. We can interface via UART ideally, or, I can write some flow charts / C Code into your DSP / Processor to talk back to my processor. We would require ownership for manufacturing / customizing purposes

Electronics

Ταυτότητα εργασίας: 10185019

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8 freelancers δίνουν μια μέση προσφορά $4.931 AUD για αυτή τη δουλειά

@shahbaz1980

Hello, Have a great day. We are startup company offering services in design and prototyping of Electronic devices. We will ship you fully working hardware. please feel free to contact. please note amount quoted is equivalent to USD 5,000.00 Best Regards, Shahbaz.

$6.700 AUD σε 45 ημέρες

4,7

(36 αξιολογήσεις)

6,4

@EmbedSol

hello i can do this project for you i have the experience in stm32F series and i have done projects related to IOT , pl consider for the details

$3.333 AUD σε 30 ημέρες

5,0

(1 αξιολόγηση)

4,3

@adipdutt

I plan to use STM32F series using soft DSP capabilities and low power consumption, code written in ;C' in IAR environment or GCC.

$4.580 AUD σε 30 ημέρες

5,0

(9 αξιολογήσεις)

3,9

@ahmetcoban

Hi, I designed high speed pcb before . I am using altium.

$4.444 AUD σε 30 ημέρες

4,0

(1 αξιολόγηση)

2,2

@elementalelec

G'day from Elemental Electronics. We are an Electronics Design Start-up Company based in Melbourne. For this project we would use multiple LM567 tone decoders and some type of mux/switch to iterate through the decoders (As a standard DTMF receiver won't be able to detect your tones as they are outside the "standard"). I do have some addtional questions on your requirements. I believe the challenge with this project would be to bring the cost down to $10USD/Board, we would have to use a micro with on board DAC's to generate your DTMF tones.

$6.666 AUD σε 30 ημέρες