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Build me an intercom communication system

$250-750 USD

Closed
Posted over 3 years ago

$250-750 USD

Paid on delivery
Looking for an electronic engineering company to create an intercom system using mobile technology (3g~4g). The system should be two way with battery backup for about 4 hours in case of power failure. Over and above the normal two way communication a sms will be sent to different numbers when ever there is call from the system. We should be able to program the numbers to be dialed out and sms to, and change remotely if the need arises.. The system must allow via cables for an external speaker, microphone and button to activate call. There is a 220VAC power [login to view URL] will be enclosed in a reasonably protected case nothing special. The volume of the speaker should be able to be adjusted. The antennae should be external. Your cost should include the supply of two prototypes and all associated costs. The budget price is only for guideline purpose. Prices submitted will be what you are evaluated against. Payment will be made on completion. Please also indicate your lead times from award to protoyype.
Project ID: 26804252

About the project

6 proposals
Remote project
Active 4 yrs ago

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6 freelancers are bidding on average $950 USD for this job
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Dear Shourne, I have read and understood your requirements and could do it for you in the least time and utmost superior quality. I have experience in intercom communication system and could design it for you as per your requirements. I am having more than 15 years of experience in PCB Design, Circuit Design, Circuit simulation, IOT products developments and building electronic products. The expertise of mine is in the following fields: 1. Wireless Products – BLE, Wifi, NFC, LoRa etc 2. Power Electronics- Buck, Boost, Flyback, Half Bridge etc 3. IOT sensors interfacing – Pressure, Temperature, Moisture, PH etc. 4. Microcontrollers- ESP32, STM32, STM8S, RL78 etc. 5. GSM, GPS, GPRS 6. 220VAC power, external speaker, microphone After reading your project details, I have certain queries and suggestions: 1. What is the application of this product? 2. What will be ambient temperature of this product? 3. What are the mechanical constraints to be taken care of? 4. What are the standards that the product would be complying to? 5. What are the user protections required for this project? Please try to answer these questions based on which I would be providing free of cost consultation. I am new to this site but I am an expert in electronics product development. Please message me so that I can formulate a success plan for this project. Waiting for your reply, Regards Hari Mohan Engineering for one is a magic for others
$2,000 USD in 40 days
5.0 (3 reviews)
5.2
5.2
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Hello Sir, I have experience developing devices using 3G GPRS modules to send SMS and make call. Actually normal landline intercom will have a EPABX where the call from an input line will be diverted to other landline. I can understand what you are expecting but if you provide a block diagram of the system you need it will be very helpfull. From my understanding you want a system working using GSM SIM technology and you want the user to call only predefined number and send SMS to configured number when a call is made. Am I right? I can do the complete design from electronic circuit designing, PCB board , assembling and prototyping. It will take minimum 2 months to complete and provide you two working prototype. But first I request you to provide a small block diagram.
$2,000 USD in 60 days
5.0 (10 reviews)
4.8
4.8
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Hi, Sorry, we are comfortable with milestone based work. We can surely create an intercom system using mobile technology (3g~4g). Kindly spare 10 minutes for the interview. We can help you in this project as we are an innovative team of Embedded Hardware & Firmware development experts driven by solutions and results. We have already developed many electronic products:- GPS Controlled Relay Event status using CC1310 chip Prayer Watch Wireless Alarm System Power Bank Camera slider controller Wifi home automation Bulb with remote control Curtains with remote control Automatic flush control Smart watch for hajj We will be glad to hear from you! Regards, Intellisense Technology
$700 USD in 30 days
4.9 (3 reviews)
4.0
4.0
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Hi friend, I can implement this solution for you with sim800 module (GPRS). Of course I'm highly experienced in PIC and AVR , STM32, cypress PSOC micros in C/C++. And also exposed to VHDL for Altera and Xilinx FPGAs too. In Software Programming, highly experienced in C# .net, MS SQL server, C/C++, python and IOT concepts. My history of industrial involvement will be definitely helpful for you. Thanks and best regards, Niroshan R.
$250 USD in 14 days
5.0 (3 reviews)
3.3
3.3
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Hi, I am interested in assisting you with this task. I am an Electrical Engineer by profession with over 6 years work experience, and I have in possession a master’s degree in this field. My experience evolves around: • FIRMWARE: FPGA firmware in VHDL and Verilog for Altera/Actel/Xilinx FPGAs and SoCs; Also, I have an extensive experience in MCU firmware in C or C++ for ARM, TI, NXP, Atmel, PIC, Arduino. GPS modules, Pressure sensors, Bluetooth, Bluetooth Low Energy (BLE), wireless modules programming, Temperature, Metal Detectors, motor drivers, 12V, 24VDC motors, Servo Motors, HC-05 Bluetooth. • HARDWARE: Schematic capture – Analog, Digital, Power Electronics, EDA; Altium Designer. PCB Layout: Altium Designer, 1 - 10 layers; Component selection, BOM generation, Gerber generation, HVAC, LTE system model, Thermal system design, Matlab/ Simulink, Microcontroller, Modeling, optimization, simulation of building energy systems, and I have also taken up some tasks on Industrial Automatics, Prototyping, PCB Design, Development of Electronic systems. I only take up tasks that I have experience in; I am open for corrections and modification. It is however going to be of a great privilege if you can entrust your task in my hands. I promise to give you a great experience working for you.
$250 USD in 1 day
0.0 (0 reviews)
0.0
0.0
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I had been employed by several reputable organizations and respected clients worldwide. The job has enabled me to excel in my professional life as an electrical engineer with 8 years of experience. You will get more than expected results from me this side guarantees that.
$500 USD in 4 days
0.0 (0 reviews)
0.0
0.0

About the client

Flag of SOUTH AFRICA
Johannesburg, South Africa
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0
Member since Aug 2, 2020

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