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Circuit Design Jobs

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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...
Fixed-Price - Est. Budget: $ 1,000 Posted
We are looking for a resource to design a miniature PCB board 10mm x 10mm in size to produce a MEMS pressure sensor. This will be configurable for both gage and differential and need to be compensated and able to be calibrated to the following specifications: Switch Type: Normally Open • Type of Actuation: Vacuum (Contact closes upon application of vacuum pressure, Open upon release of vacuum) Pneumatic • Set point trip pressure: 0.25 +/-0.09 inches of water vacuum • Set point shall not be affected by application of 10.0 PSIG positive pressure Electrical • Contact Resistance: 500 milliohms maximum • Recommended switching load: 10-20 milli-amperes Physical • Operating Temperature: -15 to +55 degrees C • Terminals: Tinned (PC board mounting) • Media: Gaseous oxygen to 8.0 PSI positive pressure
Fixed-Price - Est. Budget: $ 300 Posted
Design a power bank of capacity 10,000mah(Li-Polymer) which provides two ports for charging mobile. It have following features 1. Power bank should be charged in less than 4 hours. 2. Power bank and mobile devices could be charged simultaneously. 3. Overvoltage protection 4. Overcurrent protection 5. short circuit protection 6. Cell balancing 7. Two Ouput USB ports for charging mobile one of 5V 1A and other of 5V 2A Need serious bidder. This may be start but it can turn into long term relation. Bidders from Pakistan are encouraged to apply.
Hourly - Est. Time: Less than 1 week, Less than 10 hrs/week - Posted
link to kicad project. https://drive.google.com/file/d/0Bym9XrdeViekWDZTSjZTRG1iTmM/view?usp=sharing hello , i have a project for you. this is an electric speed controller. this design is finished but i want to do 2 things to it. i want you to study it and design a way to join 2 together. i want you to join the positive and negative power inputs into the 1 and have them closer to the bottom of the pcbs. i want you to consolidate the parts so they share any parts that can be shared such as the voltage regulators usb and if possible the mcu. the second thing that i want you but is actually the priority, is do is make a second pcb using this current single pcb design and reduce it as much as possible. the current speed controller is made for 60v and rated for 100A i want to make one that is small and only rated to 10A at maybe 24v. the motor control ic that is currently used is the TI DRV8302 i want to replace that chip with the DVR8332 that has lower power ratings but also has...