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Electronic Workbench Jobs

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Hourly - Expert ($$$) - Est. Time: 1 to 3 months, Less than 10 hrs/week - Posted
Design a circuit to collect (harvest or couple) AC power from the EMFs generated by overhead 3 phase AC electric transmission lines/circuits in order to power a remote, autonomous, 30 W field computer and sensor system. Such systems are located at the periphery of high-voltage transmission line ROWs (Rights Of Way). Minimum distance to the overhead phase conductors is ~ 20 meters. Power harvesting/coupling mechanism and design can be based on AC Magnetics (induction) or AC Electrostatics; I have significant experience in sensing and in obtaining power using AC Magnetic Induction, and would prefer an AC Electrostatic Approach. A DC Output is desired, but low-voltage (<220 Vac) could be used. High-voltage overhead transmission lines/circuits range from 69 - 765 kV and, typically, carry 100 - 1000 A. Initial work should target 500 kV with a 500 A load.
Skills: Electronic Workbench Analog Electronics Circuit Design COMSOL Multiphysics
Fixed-Price - Expert ($$$) - Est. Budget: $600 - Posted
I just wanted to clarify that the output needed to be sinusoidal. Please let me know what all would be provided with the solution. Please, find the attached file with the design requirements. Please, let me know if you need clarification on anything. If you would like to quote it in stages that would be fine. I would like it in 20 days or less, I would like you to supplying the complete tested working control and buy components, because I don’t have hardware. This project will be difficult for you if you have not developed a frequency drive before. Do you have an idea of what you would need? Have you developed a Frequency Drive or something similar before? I would like it in 20 days or sooner. I want you to supply all the material it will be great. I will send the fund into milestones based on progress. You will have to design and hardware for the VFD controlled by raspberry pi and Touch screen. The main part of the design is VFD design ok. I do not have the hardware. I am an Electrical Engineer and able to program in C/C++. I do not have the resources to develop this product so; I will need the complete solution. The main part is the VFD design and interface to a raspberry pi that will utilize a touch screen to make the output adjustments. I mentioned all the details over here for more info please, find the attached pdf file thanks.
Skills: Electronic Workbench Analog Electronics Arduino Circuit Design
Fixed-Price - Entry Level ($) - Est. Budget: $1,000 - Posted
I am a CNC machine user and some of the jobs that run on the machine can take hours. I would like to find a WIFI camera with an external trigger that will work with an app so I can monitor the status of the machine from another room. The trigger will work off of a relay so when an end of job signal is sent from the CNC that it will send an alert warning to the app letting me know the job is done. I would like to use a wifi camera that is readily available on the market if possible. This solution might be something that I would like to turn into a sellable product at some point. requirements are - Use off the shelf readily available camera - app to monitor camera and have an alarm when end of job triggered - relay that connects to the system that is triggered by the cnc when job is finished Thank you
Skills: Electronic Workbench Electronic Design iPhone App Development
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