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Circuit Design Jobs

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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.
Hourly - Est. Time: Less than 1 month, 10-30 hrs/week - Posted
I need someone to program an Arduino touch sensor pad. The main electronic components will be an Arduino MCU, touch sensors and LED lights. I have a few options on how I can make it, but I have a limited background in electronics so I need help first to determine which method would be the most effective, especially which type of sensors would work best for the field conditions. Once we decide on the physical layout, I need you to program the Arduino to pick up the sensor signals to light up the LEDs.
Fixed-Price - Est. Budget: $ 100 Posted
Design three types of universal LED bulb driver: 1.) Using minimal component to keep cost down (See "01.jpg" and "02.jpg" attachment ) 2.) Using integrated circuits for higher brighter/Life of LEDs(But cost must be low) 3.) Using some high end technology to keep Quality and life longer(You can also add extra features like light sensing technology and make it energy efficient) Input: 90-260v AC Output: Volts: Universal Amps: Configurable just by replacing transistors or any single component(No need to change design) Note: I do not want any current leakage/wastage (or as minimal as possible)
Fixed-Price - Est. Budget: $ 244 Posted
my project consists of 2 parts. 1.)the calculation and sizes of the laminations(noss v470) as well as the windings for 3 phase 220v 4 core 20kva alternator. 2.)i need a circuit designed for the alternator that automatically add an adjustable load the main load. the circuit must rectify the alternator winding and combine the to form a 240v single phase output. the out must the be inverted to 50 Hz .whether the phases must be combined before or after the frequency conversation i don't know.after this the 240v 50Hz goes to the load. from the load it must the come back to an artificial load. the size of the artificial load will change according to the output. the artificial load will always be the generated power being produced by the alternator at that time minus the main load at that time plus half of the resultant . for example if the generator is producing 6kw and the load is 2.2 the the resultant is 3.8kw. the artificial load must now be 3.8kw multiplied by 1.5. this only applies...