Circuit Design Jobs

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Fixed-Price - Intermediate ($$) - Est. Budget: $5,000 - Posted
Looking for intermediate to expert in the area of digital circuit design, schematic entry, pcb design and prototype development for a small design based upon the ESP8266 chip. The board will sample an analog signal, process it according to set criterion and send and receive data to a server over wifi. Will also receive data over wifi to be sent to a DAC and/or other device. Prefer those with experience in both hardware and software design for this platform. Will need to develop prototype as well as troubleshoot both hardware and software for the project. Would be helpful if applicant is very familiar with Linux software development in C and C++. Arduino development and other microcontroller project design and implementation a plus.
  • Number of freelancers needed: 2
Skills: Circuit Design Arduino C Electrical Drawing
Fixed-Price - Entry Level ($) - Est. Budget: $250 - Posted
I'm looking for a partner able to build or find (to buy) an existing a PCB board for an AUDIO NOISE CANCELLATION (similar to Bose one). This device will be used inside of a really noise work room, to reduce as soon as possible the noise produced (not always the same noise).
Skills: Circuit Design
Fixed-Price - Intermediate ($$) - Est. Budget: $500 - Posted
I need 2 separate PCBs designed to interface with a raspberry pi over standard pi 40-pin bus. "Sensor" board: 27x58mm. Will have 3-4 different types of surface mount sensors on it, as well as some connectors for external sensors, the pi header, and a power input lead from the power supply circuit (below). This board will also have a power button on it which will need to send a signal to the pi over GPIO so that we can interpret things like soft power down, reboot, etc. in the code. This will also need to have an RGB LED to be able to signal different modes through a semi-transparent power switch. Power board: Approximately 30x76mm. We can get into requirements in more detail once project is started, but total sensor and components draw will exceed what Pi is capable of, so we need a separate power pcb to provide power to both the Pi, the sensor board (possibly only directly to the sensor board, and then back to Pi over 40 pin header), as well as providing power to 2 separate components (raspberry pi touchscreen and a camera module). The touchscreen power and a couple other components will need to have a mosfet switch or something to that effect so we can disable power to them via software to switch to a low power usage mode. Also need a small temp sensor on this board and barrel jack connector. Power board will need to be able to handle 5V at roughly 4-5A total current draw. Power board will also need to have a LiPo charging circuit built in for an attached backup battery. These boards will also be used in harsher environments with consistent temps in the 75-90 range and high humidity, so we need to make sure to accommodate that with proper component selection. Project will have on-going periodic work. We have been working the past 6 months with another engineer but they can't continue to work on this for personal reasons and therefore we are trying to find a replacement.
Skills: Circuit Design PCB Design Raspberry Pi
Hourly - Entry Level ($) - Est. Time: More than 6 months, 10-30 hrs/week - Posted
Provide CAD drawings and diagrams showing the route of pipes for domestic heating systems, predominantly Gas boilers. The important thing is to show the location of radiators or other heating outlets and the pipe runs to them for engineers to work from. Sketches will be provided which would need to be transferred into CAD or similar computer design software.
  • Number of freelancers needed: 2
Skills: Circuit Design AutoCAD Engineering Design Engineering drawing
Fixed-Price - Entry Level ($) - Est. Budget: $150 - Posted
This will be 2-3 days project involving entry level power engineering project, training problems will be given, and you will be given on the project on May 10, 2016 and have 2-3 days to finish the task. Project will include digital and electrical relays, motor protection, bus fault, coordinating Time dial curve, and over current analysis. All equivalent references and materials will be provided, Please make sure you can finish within project dead line. Project will be fairly simple, please apply if you are interested.
Skills: Circuit Design Computer-Aided Design Electrical engineering Energy Engineering
Hourly - Intermediate ($$) - Est. Time: Less than 1 month, Less than 10 hrs/week - Posted
the project will power 4 AA rechargeable using a solar panel which will be connected to a set of super bright leds (white) and 1 red led with a on/off switch. the light will be on dusk/dawn as long as the leds and batteries last. they must be easily interchangeable on production it will come in about 5 pieces . what i need is some one with the right experience to put it together for the prototype maker. solar panel tech is important. rechargeable battery knowledge is important, led knowledge is also important. the project w come in two sizes about 8"length,6"width,2" thickness i will give the other dims later. 9
Skills: Circuit Design Electronic Design
Hourly - Expert ($$$) - Est. Time: Less than 1 week, Less than 10 hrs/week - Posted
hi. this project which is attached is about power computer. they are four things to do in this project . the first is do flowchart for control vhdl. the second is to use software call (quartus II 9.1 ) for Vhdl. the next step is used components for example( add-sub, multiplexer, register, and controller which is must be same as the flowchart design. the last thing is, you can use software call( luichart to draw the flowchart)
Skills: Circuit Design Computer-Aided Design Electrical Drawing Microcontroller Programming
Fixed-Price - Intermediate ($$) - Est. Budget: $15 - Posted
A journal article in pdf form is attached to this job. After reading this article, and then based off of it, a 2-3 page summary is to be written. 1) One quality of a well written paper is that it will give the reader some idea of the motivation for the work, how the work fits into the current state of affairs in the research field, and how the work presented in the paper advances the “state of the art”. The paper should give some background references to help establish these things. Identify the motivation of the authors. What work had been done previously by the authors or others that led up to the publication of the paper? The authors should state what contribution their paper makes to the field. What is this? In general, why did they write this paper? 2) Look up the background references. Were the references appropriate? Did they indeed “set the stage” for the work in the paper? Explain why or why not. Decide which paper(s) is (are) most important and write small abstract. Need no more than two, so use your judgment on which two are most important. Defend your choice. 3) This paper should also give you some idea of how the results given in the paper advance the general knowledge in the field. Identify and summarize what this is for the paper. 4) Briefly summarize the main results of the paper and the main conclusions of the paper. Is this mainly an experimental paper (where real, physical measurements are the main results of the paper), or a theoretical paper (where the main results are from calculations or simulations), or is there some of both?
Skills: Circuit Design Electrical engineering Electronics Integrated Circuits
Hourly - Intermediate ($$) - Est. Time: More than 6 months, 30+ hrs/week - Posted
We are looking for electronic engineers/team who can start working on requirements, design the circuit/PCB, then design firmware and also able to communicate with our software development team to design adapters. Please share your experience.
  • Number of freelancers needed: 3
Skills: Circuit Design Electrical engineering Electronics Embedded Systems