Circuit Design Jobs

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Fixed-Price - Expert ($$$) - Est. Budget: $20 - Posted
hi , need circuit and design for below requirement a) Hardware schematic (circuit) design. b) PCB layout design with production quality PCB. or any other things u feel to make my device work Refer my recuirment as attached i need an device of size 1.5inch x 1.5inch x 0.5inch including battery battery should be USB rechargable an total of 6 devices should be connected with distance of 2 inches for an strap of 1 feet height and widht of strap should be same like bra strap. In the 1 feet i should be able to install 6 devices with 2 inches distance. Purpose of device - Device specification or requirement is as below - 1)The device you design should be small enough to fit in the 2 inches distance within 1 feet strap. 2)The device should create sense/vibrate only for fraction of sec(just like poking needle into skin). 3)Only one device should create senses at a time . 4)every device need to produce an vibration/senses to the skin with below time intervals time interval :2 sec for first 10 mins then 1.5 sec for next 10 mins then 1 sec for next 10 mins and 0.5 sec for next 10 mins. 5)there should be charging facility with atleast 2 hrs backup if fully charged (prefarbaly USB charger is good) Please give the quote for 1 strap to test it . we can work on other issues later . Note: the vibrators or sensors should be of voltage where its acceptable to human conditions and not to produce more volatage and cause damage to human skin . I believe an voltage of say 2v to 5volts is good
Skills: Circuit Design Electronic Design PCB Design
Fixed Price Budget - Intermediate ($$) - $2,000 to $3,000 - Posted
This project involves developing hardware and software. The end product would be an appliance embedded with a WiFi circuit, which could be programmed and controlled from a website to operate a single digital output and report the status of that output and one analog input. The analog input would indicate the level of an aqueous solution in the appliance’s holding tank. It will utilize Bluetooth to be commissioned via a smart phone App and Wifi to communicate with a LAN. This device will be similar to several commercially available "Smart Socket" products. The developer would receive progress payments as milestones are reached. An ongoing retainer for support and modification is also possible. Please indicate your area of expertise (hardware or software) and all relevant experience which qualifies you to be selected for this project.
Skills: Circuit Design Application Programming Hardware Prototyping Microcontroller Programming
Hourly - Expert ($$$) - Est. Time: 1 to 3 months, 10-30 hrs/week - Posted
We are at the tail end of building the first Bluetooth controlled exercise weight machine. We are seeing some interference issues and stability issues. I'm looking for an RF engineer that has experience in the various methods of RF Signal transmission. If you have worked with RC controllers, Bluetooth, or Wifi on embedded systems, I'd like to get your help. It is our goal to build a reliable and fail safe system. Signal integrity and critical mission protocol would be ideal. Please let me know if you are interested. Check us out on Long term opportunity is also available. -Brandon Chief Product Officer
Skills: Circuit Design PCB Design Serial Port Interfacing
Hourly - Intermediate ($$) - Est. Time: Less than 1 month, Less than 10 hrs/week - Posted
Need an experienced engineer to design a reliable circuit board to control a high-power LED using a custom lithium-ion 18650 battery pack. To be a commercial product. Will require features such as LED dimming, battery level indicator, and A/C adaptor. I also need some consulting to help work out battery specifications to have manufactured.
Skills: Circuit Design Electrical engineering Electronics
Fixed-Price - Entry Level ($) - Est. Budget: $50 - Posted
Upworker to do the ffg; 1. Design a circuit with the utilisng the PS25251 sensor (refer to 2. The sensor should be mounted on specially designed circuit board (with the same footprint of the sensor) 3. The circuit board should have a connector to which a harness connects to. 4. The circuit board connects to another 'motherboard' which has an LCD and MCU 6. Upworker should source a single PS25251 sensor from suitable local supplier (~$10). 7. Circuit to be designed using equivalent components from 8. Upworker should not buy any additional components (other than the PS25251) 9. Supply voltage is 12VDC (should be regulated to supply sensors + MCU) 10. MCU should be a PIC (5V or lower because sensor operates within this voltage) Deliverables 1. Simulation 2. Through hole PCB design (single sided) for the motherboard (Gerber files required) 3. SMD PCB design (double sided) for the daughterboard (Gerber files required). This side should not have the connector as it is the receptor 4. Video of the working circuit 5. Code in C and instructions on how to program using PICKIT 3.
Skills: Circuit Design C Electronics Embedded Systems
Fixed-Price - Intermediate ($$) - Est. Budget: $5 - Posted
Looking for someone to work with hand in hand on creating a product from the ground up designing hardware and software for a multi function smart watch. This post is an application to find and hire someone willing to work as the lead engineer for future products for my company and initial payout will be commission based. For those who apply and inquire details on payout and the product will be discussed at that time. Initial funding will be through a few personnel investors and loans to fund necessary materials that will be needed. After completion you will be compensated on an agreed negotiated payout or percentage of the company.
Skills: Circuit Design 3D Modeling Agile software development Computer-Aided Design
Fixed-Price - Intermediate ($$) - Est. Budget: $20 - Posted
My (cut down) Arduino seems to restart under heavy load - as in lighting an LED strip consuming 1~2 amps. It works fine with lower loads. I need an expert to look at it and advise me what could be wrong? No time wasters needed! If you have the skills and worked on something similar before, then please send me the following: 1. Your mobile number with country code and all 2. Similar project you have worked on Work will only be considered complete when your proposed solution works.
Skills: Circuit Design Electrical engineering Electronic Design PCB Design
Fixed-Price - Intermediate ($$) - Est. Budget: $200 - Posted
Looking for an experienced PCB designer that can layout a simple 50ohm transmission line with a varactor in series (50ohm input ---- varactor ---- 50ohm diode). The board must allow a SMA connector on input and output as well as a power supply to modify the cap value. This must work at 4GHz to 5.5GHz and must be designed in Altium.
Skills: Circuit Design Altium Designer PCB Design