Build a Prototype Circuit

$250-750 USD

Terminado

Publicado

hace alrededor de 9 años

$250-750 USD

Pagado a la entrega

I am asking an electronics expert to design a device that is simple to manufacture and reliable to use. Required Components: -Small LED Display (between 3 and 6 square centimeters in area) -On/Off Push Button -Current Up Push Button -Current Down Push Button -1 Anode Wire, 1 Cathode Wire -9V Battery Basic Circuit Functionality: -Mainain any current the user sets be 0 and 2.0 mA in 0.1 increments given variable resistance between 2,000 Ohms and 30,000 Ohms. -Detect when circuit is broken (anode —> device with variable resistance —> cathode) and power down. -Prevent a current above 2.0 mA from ever going through the circuit. Circuit Notes: -The device with variable resistance will need to be simulated. In use this device will actually be the human body. Desired User Experience: -Press On/Off Button -LED shows “0.0 mA” -Press Up button once. -If circuit is not complete: LED shows “Connect” -If circuit is complete: LED shows “0.1 mA”. Current is flowing at 0.1 mA. -Pressing Up button repeatedly brings current up to “2.0” but not higher. -Pressing Down button brings current down by 0.1 mA. -If circuit is broken while current is flowing, device powers off immediately. -If On/Off Button is pressed for more than 2 seconds while current is above 0, the current will step down at a rate of 0.1 mA every 1 second. Then the device will power off. -If On/Off Button is pressed for more than 2 seconds while current is at 0, the device will simply power off. Goals: -Minimize cost of components (Max $35) -Keep manufacturing process simple (Max 20 min to assemble by a non-expert) *Using Arduinos and any ready-made-components is perfectly acceptable even encouraged -Keep the size relatively small (This will be a hand-held device that fits in someone’s pocket) Deliverables: -Functioning prototype (Does not need to have an enclosure, but that would be a bonus) -List of components with prices and product URL (must be able to purchase) -Step-by-step description of a Quality Control process (test and confirm functionality of a manufactured circuit, should take no more than 10 min)

Arduino

Electrical Engineering

Electronics

Microcontroller

Product Design

ID del proyecto: 7262858

Información sobre el proyecto

29 propuestas

Proyecto remoto

Activo hace 9 años

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@voyagerforth

Hi, You have produced a good specification thanks for that its appreciated. I have many years in microcontroler based design and manufacture. I have also spent many years in implantable device design and manufacture, mostly in cardiac pacemaking and bone growth stimulation. Some observations: The logic of the devices operation is well defined and logical. The amount of processing required is very small, easily done with one of the smaller Atmel devices which keeps it inexpensive and could still be a micro Arduino. With a load of 30k the device will need to generate 60V to comply with the 2mA. If this device is to be used with human subjects I will have to insist on a disclaimer on my part. I can add the protections but I cannot take the responsibility for its use. The design would likely require some good soldering skills, but not that many parts. Price should be ok at the component level but depends on your quantity. Your other goals and deliverables are fine. This design really has to be done on a custom PCB, how many are you planing on building? If it suits you I can produce 3D printed encosures to house the product. One housing is included in my bid. Regards and good luck with the project James Harrison-Smith Infonics

$722 USD en 10 días

4,5

(13 comentarios)

5,3

29 freelancers están ofertando un promedio de $1.235 USD por este trabajo

@sagradoamicus

hi sir i am an expert embedded system designer I have read your requirements and can do it easily. Please consider me for this job I assure you quality work and on time delivery Please reply to discuss it further Regards

$555 USD en 10 días

4,8

(268 comentarios)

8,0

@uetian09ee506

I am an Electrical Engineer having specialization in Electronics and Control, working as Lab Engineer at FAST National University Pakistan, in Electrical Department,I have conducted the followings Labs, and also supervised Projects related to these labs. 1. Control System Design & Modelling (Matlab & Simulink) 2. Digital Logic Design (Verilog, VHDL) 3. Digital System Design (Verilog, VHDL) 4. Computer organization & Assembly Language (8086 processor, 8051 controller) 5. Electric Machines 6. Circuit Analysis and Design etc. I assure you, if you assign your project to me, you surely gonna work with me in future.

$750 USD en 6 días

4,8

(263 comentarios)

7,3

@seshupower

Hi, I am a post graduate power electronics engineer and having very good experience in product design and development. I am excellent these kind of products design and development. I already designed this kind of projects for embedded controllers. I am ready to work for you. Please contact me for further discussion.

$555 USD en 15 días

4,9

(61 comentarios)

6,9

@shahbaz1980

Hello, Have a great day. I am Electronics Engineer running an R&D setup. Most Probably you are looking for TDCs (Transcranial direct-current stimulation). I have already worked on such a device. Rest of the details will be shared in chat. Any ways we will ship you working unit. Please feel free to contact. Best Regards, Shahbaz.

$1.500 USD en 25 días

4,6

(71 comentarios)

7,0

@VoblNet

Hello. I am ready to work on an interesting project. I can design and make a prototype, as well as to make all files for production.

$750 USD en 25 días

5,0

(41 comentarios)

6,6

@pcbdcs

Hello, I have been associated with Hardware design (Circuit / Electronics design), PCB design, PCB Manufacturing, Component procurement, PCB Assembling and Functional testing for over 7 years. I have used various CAD/EDA tools for PCB design. Would you prefer any specific EDA tool for PCB design (or) any tool is okay? I will provide the PCB Manufacturing, Component procurement, PCB Assembling & Functional testing services too. I would like to take this up and are fully equipped to deliver the required files. So, if you'll give me a chance to take part to your work, I will respond in the same manner, handling you good quality projects, as soon as possible. I look forward to hearing from you! Wish you a nice day! Thanks & Regards, Karthik

$450 USD en 15 días

4,8

(100 comentarios)

6,6

@quang102

Đề xuất vẫn chưa được gửi

$1.666 USD en 30 días

4,7

(35 comentarios)

6,5

@Anthony989

Hello Sir, I am a full time working freelancer and I am available on freelancer most of times and I can provide you the required prototype as you want it. I have very good feedbacks from my previous employers and I have been doing prototyping for many years. I have completed many projects and shipped out the prototypes. I have contacts in Chinese manufacturing firms so I can assist you with mass production of the units. Please contact me if you are interested. I have attractive milestone planes that assure the satisfaction of both parties. Thank you Anthony

$777 USD en 10 días

4,8

(66 comentarios)

6,5

@Manoj3050

Dear Sir, I'm an electronic engineering undergraduate and I have good experience in developing microcontroller based system developing. I have experience in PIC, Atmel and Arduino Programming and I have good experience in using existing modules for developing prototypes. I have used previously current detecting modules with Arduino and I have good knowledge in electronics to create and current controlling circuit. So I can use my own circuit developed to control current on the device and use Arduino as to make a prototype. I also suggest you to use an LCD screen which is much useful then LED display. I can make the circuit and put in a enclosure and send it to you. Looking forward to here from you Thank you Anusha

$611 USD en 10 días

5,0

(36 comentarios)

5,7

@maxbul

Hello. I have big experience in microcontrollers (including Arduino), so i able to make cirquit for you. Also I'm interested in accupuncture and electro-miostimulations (like a hobby). So, I understand why immediately cutting off is required. Also i'd propose to add separated "emergency stop" button, some big switch for cutting current off immediately. Also (if necessary) some pulsation patterns is possible in device. With best regards Maxim

$250 USD en 10 días

4,8

(103 comentarios)

5,9

@GlobalElectronic

Dear Sir I have specialize for low power energy designs. Good PCB design with good ground planes and fine filtering capacitors are crucial in this project! I am ready to do complete project for you and to deliver you 3 working prototypes including schematic PCB design BOM and testing. If you are interested please let me know. P.s Milestones can be separated and agreed later Many thanks Kind Regards

$4.000 USD en 40 días

5,0

(12 comentarios)

5,3

@scribblerspk

What I understand is that you want to control the flow of current which is flowing through an object (Possibly human body) , besides this you want to have control to set the value of current up to 2.0mA. You also require some sort of small display for having feed back about the system and the set values. I can do this project , miles-stones are given below. About my self , I have 14 year experience in electronics, micro-controllers and system designing, You can also review my profile and my clients comments. Best Regards.

$722 USD en 20 días

4,9

(12 comentarios)

5,5

@cscinstructor

I have seen and fully understand your requirements please open chat window to discuss further ----------------------------------------------------------------------------------------------------------------------------------

$600 USD en 10 días

4,5

(32 comentarios)

5,3

@mamdouhmaitah

hello i am electronics engineer, i can do your project please check my profile and text me if you are interested mamdouh almaitah

$1.333 USD en 10 días

4,8

(10 comentarios)

4,8

@shrinivas02

A proposal has not yet been provided

$556 USD en 15 días

5,0

(1 comentario)

2,8

@Ktronics

I have experience of 16+ years of Schematic design , Firmware development , PCB design & PCB manufacturing process. I expert in arduino and PIC microcontroller embedded system. I also expert in PCB design. I currently Altium Designer 10/Cadence Allegro/Fritzing/Proteus VSM/Eagle/Kicad/Orcad 10/AutoCad 2013 Electric/Solidwarks 2013 / Mentor Expedition user design software. Let discuss more. I also looking for long term relation Below is the project list that we involve : - Low cost PIC microchip development board -1 board - Lost cost Atmel development board - 1 model - UPS 600 Watt and 1200 watt - 2 model - Recorder- system - 6 model - Navigation-system - 50 model(Military/aerospace- Honeywell) - Microwave oven. - 20 model ( Samsung/GE Electric ) - Arduino board - 5 model - PLC - 1 model Lets discuss .... **I currently Altium Designer 10/Cadence Allegro/Fritzing/Proteus VSM/Eagle/Kicad/Orcad 10/AutoCad 2013 Electric/Solidwarks 2013/Mentor Expedition user design software. Approach to the Job: Approach to the Job: We do support electronic design till mass production activity. Please refer attachment for our portfolio

$750 USD en 21 días

5,0

(1 comentario)

2,4

@chuck317

A proposal has not yet been provided

$2.222 USD en 20 días

4,4

(1 comentario)

2,4

@sokolsp

Hello, My name is Sergey. I am the Master in Electronic Engineering. I have a big experience in developing the devices based on low-power microcontrollers (such as AVR, MSP430, 8051, PIC, ARM). I have an experience in different communications as well (Bluetooth, Wi-Fi, SimpliciTI, I2C, SPI, 1-wire, RS-232, RS-485). I also have an experience in development, producing, assembly and adjustment of PCBs of 1 and 2-layers in home conditions. I have all necessary equipment for this. I have read the whole specification of the task, and it seem to be very interesting for me. I can develop the schematics, make the PCB and write the firmware for microcontroller. So you will get the fully working prototype. For more information about me please see my profile. Thank you for your consideration, Kind regards, Sergey Sokol.

$500 USD en 8 días

0,0

(0 comentarios)

0,0

@combover61

Greetings, Thank you for this opportunity to propose the technical services of Franklin Innovation LLC to assist you in the engineering development of an electronic product. This project will be executed utilizing a proven systems engineering process that assures a solution that is completed on-time and on-budget. Benefits We have completed many successful designs utilizing both standard and surface mount components. This project will leverage all past work expereince as well as extensive in-house electronic instrumentation for sensitive and accurate measurements. There are many opportunitites for failure on a project like this, experience and the right tool set is key. Scope of Opportunity Design, build, test and deliver one working prototype. Assumptions 1 Client will be available to review and approve each milestone in a timely manner. 2 Materials and shipping not included, provided by client based on BOM generated by Franklin Innovation. 3 Final packaging not included. 4 Results of each milestone are sent to the client for review, comment and approval prior to moving on to next milestone. 5 Requirements may not be changed during fixed cost projects. 6 Either party may terminate the contract at any time.

$3.000 USD en 30 días