Add Dry Contact and rechargeable capacitor solution to the existing electronic PCBA board

$250-750 CAD

已完成

已发布

超过 7 年前

$250-750 CAD

货到付款

Purpose of the project is to adjust existing board with speaker (board is connected to power outlet): 1. To add Dry Contact ON/OFF switch ( See point 1 on the sketch) (possibly to the speaker connection on existing board). When speaker is ON that will activate dry contact switch to be ON as well, when speaker is OFF switch to be also OFF. Dry Contact switch should be power isolated from dry contact on additional board i.e. cannot have power at the output, but triggers dry contact on the other board. (Preference is to use one dry contact switch for both existing and additional board if possible). 2. To add charging board ( see point 3 in the sketch) with rechargeable capacitor ( see point 2 on the sketch )(or at least two rechargeable AAA batteries) to serve as a backup in case of power outage. Capacitor needs to provide backup power to both existing board and one additional board. Voltage to the additional board have to be adjustable to 2.4V and to 3V and to Amperage of 800 mAh AAA battery. Power requirements of existing board to be determined. Freelancer/Contractor needs to sign NDA before commencing the work and more details are provided, and (if needed) Freelancer/Contractor must be able to design and/or replace existing relatively simple board with speaker.

Electrical Engineering

Electronics

PCB Layout

项目 ID: 12950500

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11提案

远程项目

活跃7 年前

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@luisfilipeaguiar

Hi, I have designed a few wearable and medical electronics. I am confident I can meet your needs in short term. In case I am awarded the work, I would like to design and test the circuit and ship it to you. I would have further improvements to circuit and production to make it DFM. Since, I am Boston, it would be rather quick. Kind regards, Filipe

$444 CAD 在10天之内

5.0

(2条评论)

4.5

11威客以平均价$595 CAD来参与此工作竞价

@sagradoamicus

Hi Sir I am an expert electronics engineer with more than 8 years of experience in this field. Please have a look at my profile to see the reviews of my previous employers . I can provide you solution to all the problems you have mentioned I am waiting for your reply to start Regards

$550 CAD 在5天之内

4.8

(260条评论)

8.0

@MikroStar

hi, i am an electrical engineer. i have expertise in embedded system design and Matlab.i can help you with this project. Kindly reply back and let us discuss project further. regards

$600 CAD 在4天之内

4.8

(76条评论)

7.8

@seshupower

Hi, I am a post graduate power electronics engineer and having very good industrial experience of 8+ years in R&D and project development. I am excellent welding power supplies design, high frequency transformers design, circuits design, multi-channel LED Drivers, Regulated power supplies design with universal input to DC output, Audio amplifier, drives design, Filters design for harmonic analysis and Power factor correction, SMPS, LED drivers, DC-DC, AC-DC converters design, PFC interleaved boost converter, Battery management system, Battery chargers, UPS design, sine wave Inverters, solar grid tie inverters, Solar battery chargers and street light systems design from few watts to KW range using Buck, Boost, and Buck –boost, Interleaved boost/buck, Fly back Push Pull and H-bridge inverters. I have very good experience to design high voltage power supplies up to 50KV for capacitor charging power supplies using soft switching topologies. I have work experience to design from few watts to KW range meeting all compliances like EMI/EMC and safety standards UL etc.

$777 CAD 在15天之内

4.9

(60条评论)

6.8

@farazahmad759

I am a professional electrical engineer from the oldest and most reputable engineering institute of Pakistan(UET Lahore).My expertise are 1. Circuit design, Digital Logic design, Communication Systems, Microwave Engineering 2. Control systems, Industrial control systems (use of PLC in industrial controls, motor controls, ladder diagrams) 3. Renewable energy (design of PV/wind-systems) 4. Power electronics (design of motor drives, DC-DC converters of all types, DC-AC inverters of all types) 5. Huge practical experience in programming microcontrollers, microprocessors, PLC, Arduino 6. Softwares: Microcap, Matlab, Orcad, Proteus, PWS, Etap, Logisim, Xilinx. PROJECTS: I have made the following projects: 1. Smart Grid System (smart switching of the power from national grid and local renewable energy source)-FYP. 2. Four way traffic Light light control (using ATMEL) 3. Audio Amplifier 4. Touch screen Interface (Using PIC micro controller) 5. Automatic room temperature control (using ATMEL) 6. Industrial sorting using conveyor belt (using Arduino) 7. Left-shifted multiplication (digital logic design, VHDL) 8. Processor (performing basic arithmatic operations, plus binary shifting/rotating/multiplexers/decoding operations) 9. Speed control of fan (using ATMEL) 10. Maze solving robot (using AVR) 11. DC-DC converter (boost, buck, flyback, half bridge and full bridge) 12. DC-AC inverter (using SPWM) So, let's discuss details. Regards. Faraz Ahmad

$1,500 CAD 在40天之内

4.9

(47条评论)

5.6

@alexandrchasnyk

Hello. The circuits that you have attached is really in low quality. I have a couple ideas how to solve your problem, but i should know the requirements for size and power consumption.

$333 CAD 在20天之内

5.0

(13条评论)

4.0

@engrsaimhassan

I am expert writer, good designer , engineer and programmer. i am sure i can do your task better than any other person. you will get 100% accurate work before deadline. kindly award me this project. thanks in advance.

$250 CAD 在2天之内

0.0

(0条评论)

0.0

@PeteAvinstech

The work sounds simple enough, but the sketch you refer to in the description wasn't included in the proposal. I'd like to see the schematics of the existing board if possible. Signing a mutual NDA before any discussions if required won't be a problem. Best Regards Peter AvInsTech Ltd.

$650 CAD 在10天之内