Electrical Engineering Jobs

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Hourly - Intermediate ($$) - Est. Time: 3 to 6 months, 10-30 hrs/week - Posted
We are based out of Richmond, Virginia and focus on MEP permits for multi-family and commercial fit-out projects. I am looking for people that I can call on as we get projects to help in floor plan layouts, Revit production, load calculations, and equipment selections. If you are interested, please reach out and we can talk about getting you involved with our projects. Thank you, Kenny Shultz, PE Principal, Archingen
Skills: Electrical engineering Autodesk Revit Drafting Electrical Drawing
Fixed-Price - Intermediate ($$) - Est. Budget: $7,000 - Posted
Looking for an experienced EE to design a PWM controller that can switch 24 channels of 5-24 volts with a maximum of 15 amps current for at least the first 4 channels and max 5 amps on the rest (15A max for all channels is preferable). Either way, a max of 40 amps total current. I have in mind that an LED controller chip would be used to provide the I2C interface and PWM control, and then connect that to FET's to switch it, but open to alternative design proposals. Intermediate deliverables will be regular progress updates and design review. Final deliverables shall be 2 tested & working assemblies plus all design and manufacturing files, preferably in Eagle CAD. Please provide a portfolio of past work upon application.
Skills: Electrical engineering Computer Engineering
Fixed-Price - Intermediate ($$) - Est. Budget: $2,000 - Posted
We are a french IOT Startup and we need support in the development of our prototype, mostly for the electronic and PCB design. you will find below a descriptio of our solution and attached our product specificities. Stop Voleur is a connected wearable which prevent the loss and the theft of smartphones. Hung to a watch, a bracelet, a bag or a jacket, Stop Voleur is connected via Bluetooth to your smartphone and triggers an alarm as soon as it is spirited away from you. The further you are, the louder the alarm is. Thus, in case of theft, the robber is forced to give up the phone and leave shamefully. In the event of loss or omission, you are immediately notified by the alarm and just have to pick up your favorite item.
Skills: Electrical engineering Electronic Design Electronics Mechanical Design
Hourly - Expert ($$$) - Est. Time: 3 to 6 months, 10-30 hrs/week - Posted
Someone who understands electronics enough to design circuit and schematic capture. I will need someone to transfer my schematic from a pdf to Altium or EagleCAD. I do not have time to do it myself. Job will require you to not only to draw schematic in a pcb software, but also create footprint of components that are not already in an existing library and detect any errors. Skills needed are knowledge of circuit design, layout design, and electronics in general. I will have schematic, BOM, and datasheets for completion of job. Additional key words: STM32, component selection, power and signal integrity, embedded hardware, firmware, integrated circuit, Lipo battery management IC, battery charging IC, IMU, wifi module, motor controller, video processing. The perfect candidate can easily transcribe schematic over to pcb design software and layout according to datasheet recommendations, but also suggest ways to reduce BOM, reduce PCB real estate, suggest components that may work better, etc. I need a team player who can stick around until prototype comes to life.
Skills: Electrical engineering Circuit Design Embedded Systems Microcontroller Programming
Hourly - Expert ($$$) - Est. Time: 1 to 3 months, 10-30 hrs/week - Posted
Seeking an engineer that understands how to create a network of mobile radios communicating with a central dispatching office. The system is to be installed in Iran, so knowledge of Farsi is helpful. Some 30,000 taxis will be equipped with radios. The central dispatching office will call the closest vehicle to a pickup request, so the radios must be GPS-capable. Model 7000e, from Motorola seems to fit the bill for the in-vehicle radio. Your job is to determine the antennas type and location required to cover a large city, as well as the central-dispatching office equipment. From a cursory look at mobile radios from Motorola it looks like the 7000e series mobile radio may work, but you are the expert, so you tell us. The radios must be secured outside of the US, as Iran is under embargo.
Skills: Electrical engineering
Fixed-Price - Expert ($$$) - Est. Budget: $500 - Posted
I need a 40kW three-phase rectifier, based on the Vienna Rectifier topology. It will be used in a project for an electric vehicle charging station. Input is three-phase, 380V Output is 500V, 80A I need a complete design of the power circuitry, including the control circuit. Control could be analog or digital, although digital control is preferred. Full source code (C, or whatever language) for the digital PWM control should be provided. All components parameters must be calculated and included in the schematics. Digital simulation and basic analysis (performance, THD, ripple, etc) performed using software of choice. Use of rectifier modules, such as IXYS VUM33-05N is desired, although not an absolute requirement. A PCB layout is optional but will be accepted with a premium.​ Design a 40kW three-phase Vienna rectifier, for input voltage of 380V and output voltage of 500V. Build a simulation model using any software of choice (MATLAB, PSpice, Gecko, etc). Show simulation and analysis of efficiency, THD, output current and voltage ripple. Build complete schematics of the power and control circuits, with properly calculated parameters for each component. Specific part numbers required for stock components. All specific parameters required for custom inductors. The control circuit for the MOSFET transistors can be either analog or digital. Please specify in proposal. If a digital control will be implemented, design and develop code necessary for the PWM control, including a way of monitoring the current operational parameters via some communication protocol (UART, USB). All source code should be provided. [Optional] Build a PCB layout for all components, accounting for appropriate heatsinks. Expected timeframe is as follows: Basic rough design - 1 week Complete calculations and complete design, including simulation - 1 month Complete schematics and digital control source code (if applicable) - 1 month Complete PCB layout (if applicable) - 1 week There are tons of designs and analysis available on the Internet. You are free to use any one as basis and build on it. As long as your delivered schematics work.​ Experienced electrical engineer, electronic engineer, software developer (in case of digital control). We need a person or team with realistic views and proven record of quality deliveries.
Skills: Electrical engineering Electronic Design