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Circuit Design Jobs

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Hourly - Expert ($$$) - Est. Time: 1 to 3 months, Less than 10 hrs/week - Posted
Design a circuit to collect (harvest or couple) AC power from the EMFs generated by overhead 3 phase AC electric transmission lines/circuits in order to power a remote, autonomous, 30 W field computer and sensor system. Such systems are located at the periphery of high-voltage transmission line ROWs (Rights Of Way). Minimum distance to the overhead phase conductors is ~ 20 meters. Power harvesting/coupling mechanism and design can be based on AC Magnetics (induction) or AC Electrostatics; I have significant experience in sensing and in obtaining power using AC Magnetic Induction, and would prefer an AC Electrostatic Approach. A DC Output is desired, but low-voltage (<220 Vac) could be used. High-voltage overhead transmission lines/circuits range from 69 - 765 kV and, typically, carry 100 - 1000 A. Initial work should target 500 kV with a 500 A load.
Skills: Circuit Design Analog Electronics COMSOL Multiphysics Electrical engineering
Hourly - Intermediate ($$) - Est. Time: Less than 1 week, Less than 10 hrs/week - Posted
I am looking for hire someone to design circuit board and complete solar inverter to take to manufacture to have it produced on larger scale. Inverters need to last 5 years at least. Plus i am looking to add one extra thing to the circuit board. .5 KW-25 KW design, 220v Output.
Skills: Circuit Design Electrical Drawing Electrical engineering Engineering drawing
Fixed-Price - Expert ($$$) - Est. Budget: $600 - Posted
I just wanted to clarify that the output needed to be sinusoidal. Please let me know what all would be provided with the solution. Please, find the attached file with the design requirements. Please, let me know if you need clarification on anything. If you would like to quote it in stages that would be fine. I would like it in 20 days or less, I would like you to supplying the complete tested working control and buy components, because I don’t have hardware. This project will be difficult for you if you have not developed a frequency drive before. Do you have an idea of what you would need? Have you developed a Frequency Drive or something similar before? I would like it in 20 days or sooner. I want you to supply all the material it will be great. I will send the fund into milestones based on progress. You will have to design and hardware for the VFD controlled by raspberry pi and Touch screen. The main part of the design is VFD design ok. I do not have the hardware. I am an Electrical Engineer and able to program in C/C++. I do not have the resources to develop this product so; I will need the complete solution. The main part is the VFD design and interface to a raspberry pi that will utilize a touch screen to make the output adjustments. I mentioned all the details over here for more info please, find the attached pdf file thanks.
Skills: Circuit Design Analog Electronics Arduino Electronic data interchange (EDI)
Hourly - Expert ($$$) - Est. Time: Less than 1 month, 10-30 hrs/week - Posted
My team has been working on a prototype using some off the shelf parts and its time to get it designed into a PCB. While we have a little EE experience, we figured it would be much easier to have someone else handle the PCB design. Basically right now we have a prototype built from a few off the shelf parts (sparkfun stuff mostly). Our final product will basically be a stepper motor that is controlled via bluetooth LE. Right now we're using the following: https://www.sparkfun.com/products/13729 microcontroller+bluetooth LE device. https://www.sparkfun.com/products/12859 Motor driver, we're using this to drive the stepper motor (at about 1.7A, and 12V) https://www.sparkfun.com/products/10617 We're using this to read the battery charge, though I'm sure there's an easier way if we're designing our own PCB. The last part that we don't have anything for yet is a built-in lipo charger. We need 12v, so we're looking at doing a 3 lipo cells. I've done some research and it looks like there's a bunch of battery management chips from maximintegrated that would do the job. They have schematics for completing things. https://www.maximintegrated.com/en/datasheet/index.mvp/id/6207 The board would charge through a DC jack. Lastly, we would probably have a few LED's controlled from the microcontroller. Basically we're looking to combine all of this onto one board. If it makes it easier, the big easy driver board I believe is "creative commons" and has board designs you can download. If this sounds like an interesting project, please apply and we can chat more.
Skills: Circuit Design Electrical engineering PCB Design
Fixed-Price - Intermediate ($$) - Est. Budget: $50 - Posted
We designed a simple electronic circuit that contains a: relay (5V 2A Finder 30.22.9.005.0010), diode (IN5817), a resistor of 6.3K and a transistor (547BC). We attach the schematic below. The PCB has to be about 40x50 mm. The aim of this circuit is to cut off the alimentation of a 12V line depending on a 3.3 line, with a delay of 60s controlled by an arduino. We need the following files: ·Gerberx2 files for the copper layers, soldermask and legend layers, mechanical layer and SMD paste layers. Plus carbon, peel-off and via-fill layers as needed. ·Excellon drill file(s) for drilling. Thank you in advance
Skills: Circuit Design Arduino Electronic Design Electronics
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