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Circuit Design Jobs

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Hourly - Est. Time: Less than 1 month, 10-30 hrs/week - Posted
I want a driver to run 6 of these 24volt LED white light strips driven from a single power source. http://store.yujiintl.com/collections/high-cri-led-strips-ribbon/products/bc-series-dual-cct-ribbon-120led-2835?variant=3149575809 First see this video on driving a similar strip, https://youtu.be/jLia59KfkSw?t=1m32s Use voltage regulation NOT PWM, I need to use this light with slow motion and cannot have pulsing as happens with current lights I have. There should be 2 dials, one for brightness, one for color tone balance between the 2 color channels strips (warm and cool white) and 2 switches for turning on/off each side. 1 power cord. 2 cords to connect the lights.
Hourly - Est. Time: 1 to 3 months, 10-30 hrs/week - Posted
Job Description: The Electrical Engineering Technician works with a small team to help prototype, test, troubleshoot, and document cardio machine electrical system designs. This individual must be well organized, technically proficient, independent, creative, and accommodating. ESSENTIAL JOB FUNCTIONS - Takes direction from Electrical Engineers and works with managers to prioritize requests. - Constructs and troubleshoots electrical prototypes using a variety of test equipment, including multimeters, oscilloscopes, impedance analyzers, and dynamometers. - Plans and performs product testing and keeps results and conclusions organized. - Communicates status clearly and efficiently to the rest of the team. - Writes accurate ECNs and follows up on signoffs. - Maintains bills-of-materials and components specifications. Skills required: - Must be able to efficiently produce accurate engineering documentation - Comfortable operating oscilloscopes, spectrum...
Fixed-Price - Est. Budget: $ 250 Posted
You will develop the schematics (Gerber Files, BOM, and the Eagle Files) for a PCB for a component device. It is a singular function device with one chip. The main board, which it will need to fit into, and other reference component devices are all open hardware + open software. I will provide links to all of those files. You can use those existing diagrams and specifications to model this piece. The chip you are designing for has complete documentation as well, which I will provide. So, you will take existing schematics for existing PCB components as a starting guide, look at the specifications for the chip ( I will provide all the documentation), and you will design the component piece that includes that chip, and deliver the schematics files. If you have experience designing printed circuit boards (PCBs) this should not take you long.
Fixed-Price - Est. Budget: $ 100 Posted
Dear friends, Desigining and simulation (in matlab simulink) of solar power pumping system including PV panels, DC to DC converter, motor selection/ desiginig, MPTT controller etc. Our water requirement is 1740 gal/day, Pv panels should be designed for Somalia (Afgoa town: Latitude 2.0333° N and Longitude 45.3500°E). Type of motor is BLDC (Brushless DC Motor) or Induction motor 1. Complete report about the Designing and calculation of parameters of PV Panels, size of panels with calculation MPPT Controller, DC-DC Convertor, BLDC Motor. 2. Complete description about the behavior of graphs e. g. (i) At the output of PV Panels (ii) At the output of MPPT (iii) At the output of DC-DC Convertor (iv) BLDC Motor outputs like current, speed, voltage, power etc etc Best regards, Hashim Abdullahi Abdi
Hourly - Est. Time: Less than 1 month, Less than 10 hrs/week - Posted
Project; making a device to help people sleep. Design basis; starting with tempurpedic sleep mask design, want something made from the visco/memory foam, that fits and feels like tempurpedic sleep mask - but looks like an apple product :) I will be building in electronics including an LED into each eyepiece which will need to be behind a diffuser to make sure the LED illuminates the entire diffuser if possible. I need drawings that show how this could look, and I will work out, including the diffusers in front of each eye.
Fixed-Price - Est. Budget: $ 2,500 Posted
Car dashcams are increasingly popular and most also come with a parking mode. However there are issues related to car battery discharge. There are solutions such as Celllink B, Blackvue Power Magic etc but they all have their disadvantages and issues. Goal is to design a battery pack that 1. Easily installable and with high capacity 2. Programmable with delayed start/stop etc 3. Add remote access
Fixed-Price - Est. Budget: $ 250 Posted
Project objetive is to package an LCD display module, 2 LED's, on/off switch, 2xAA batteries, battery terminals, and wiring into the constraints of an existing plastic prototype housing with removeable battery cover and make them fully operational for field testing. PCB design and IC programing for LCD module already completed. Also, looking for guidance on how to improve and industrialize for production. Freelancer must be located in Michigan in order to complete this project.
Hourly - Est. Time: Less than 1 month, Less than 10 hrs/week - Posted
Background: As you likely already know, to control amount of power a flash puts out, flash duration (and hence light output) is reduced by a thyistor control that quenches the full power flash early for light output less then 100%. Requirement: Need a circuit to be designed (along with PCB design) which will register the flash quench duration (generated by the center pin on a DSLR flash connector) and converts it into a power output that can drive a bank of high speed LEDs. Either using purely discrete components or using an arduino (your choice whatever you think is simplest). If a micro-controller is used, I will need the code as well. The output of the circuit should be able to drive and control intensity (either PWM or otherwise depending on the LED driver driver used) of a bank of LEDs.