Electrical Engineering Jobs

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Fixed-Price - Intermediate ($$) - Est. Budget: $200 - Posted
Hi, I need someone to develop some code for me as well as a basic android app. My Idea: I am developing a high speed line follower robot and I want to be able to control the speed of it while it follows a line via Bluetooth. the app will need to have the function of controlling the speed as well as have the function of turning the sensors off in order to allow free drive. I want to make it small so I want to use the following parts: *Ardunio Nano *3 point line Sensor (Pololu (USA), part no QTR-3A) *Bluetooth module *Micro Metal Gear motor 1:30 ratio Result must be tested.
Skills: Electrical engineering Arduino Electronics
Fixed-Price - Intermediate ($$) - Est. Budget: $100 - Posted
PSIM Analysis and Report of Converter Schematic I need to design a voltage controller in PSim for a dc-dc fully isolated converter and a simple boost converter where the controller parameters are checked , analyzed , tuned and chosen. Matlab, Matlab toolboxes and or simulink should be used for this process. There should be closed loop voltage control design (where necessary, with PI blocks, filters, comparators, voltage sensors, voltmeters, ammeters etc.) with reasons for block use and analysis on Control design. The circuit should simulate correctly with minimal ripple and smooth outputs. For the control design, where necessary, please include a Vreferecnce, error summer, pi block, and the gating signal should be appropriate with the reason for choice. I require a transfer function for the controller and converter with variable descriptions and component relation to variables in transfer function. I will give the spec on acceptance - they are kV converters. Design the converters for OPTIMUM efficiency and show calculation overall efficiency with Pin and Pout Values; also design for lowest losses with reason for use of components and how they increase efficiency of reduce losses. I'm trying to do an investigation looking at installed power in the semiconductors, size of passive components, evaluation of losses in semiconductors, losses in magnetic components and overall efficiency (so I need all these results with calculations, equations and reasons for use). The magnetic losses of the converter should be calculated with equations. Require files to be saved in PSIM 9.0. If you require reference papers for assistance, I can attach them as well. and a start as soon as possible. Figures should be copied from clip board as a bitmap file and analysed and explained. The report template will show and example. Stresses, losses, installed power etc. analyzeD. Need all files Psim, word and MATLAB. I have completed the circuits and need to check for optimum efficiency and output and operation. I require the equations to be laid out in the format shown in the template. PSIM and Matlab to be used. Will send attached file on acceptance. No time wasters please!
Skills: Electrical engineering Electrical Drawing Electronic Design Electronics
Hourly - Expert ($$$) - Est. Time: 1 to 3 months, Less than 10 hrs/week - Posted
The concept is to create a single PCB computer like: http://www.hardkernel.com/main/products/prdt_info.php?g_code=G143703355573 The difference is that we would like to base our product on top of the Artik10: http://static.artik.io/files/ARTIK-10ProductBrief.pdf Why ? We choose the Artik10 because it's backed by Samsung and contains a security module (we need TPM functionality). Most of the preliminary job will be to interconnect the Artik10 with peripherals such as: - Ethernet - 2xUSB - Serial (UART) - HDMI - DC (Power) - RTC + Battery - GPIO Key factors: - Clean design - Small board dimensions (height, weight, depth) - ESD protection Looking only for designers with proved experience. Advantage to those familiar with manufacturing.
Skills: Electrical engineering PCB Design
Hourly - Expert ($$$) - Est. Time: Less than 1 month, Less than 10 hrs/week - Posted
Require design digital logic controlled H bridge supply Voltage 1800V and 20 Amps. Small from factor design essential. Loads are resistive ONLY, supply is from a charged capacitor 100uf/2000V. let me know if you have experience in this field. Apply only if you know how to manage Fets, IGBT or SCR at such high Voltages and know how to manage high side and low side of H bridges with high and low side drivers or other opto drivers.
Skills: Electrical engineering Electronic Design
Fixed-Price - Intermediate ($$) - Est. Budget: $1,000 - Posted
Develop a flexible level sensor that will provide a precise resistance output based on the location of a magnetic field along the length of the sensor (circuit board). This design will not use reed switches. Ig interested, we would like to sign a Non-Disclosure agreement prior to sending product specifications.
Skills: Electrical engineering Mechanical Engineering PCB Design
Hourly - Intermediate ($$) - Est. Time: More than 6 months, 10-30 hrs/week - Posted
Looking for someone well versed in off grid systems. I manage several off grid homes that have: PV Panels, inverter, batteries, backup generator. I need someone who is well versed in both the calculations of running the system and who is familiar (or could be easily) with the schneider equipment. We often have questions and I would want to hire you and keep the contract open for when we need some light consulting. For example, my current question is this. We have 8 batteries, Deka 8L16 model. Where would we set the low battery cut out voltage so that we only draw the batteries down by 10%. How about to draw them down 30%? In that example, you would need to find the deka specs, do the calculation, and give us the answer. We are forever having questions like that with these houses...
Skills: Electrical engineering