Circuit Design Jobs

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Hourly - Expert ($$$) - Est. Time: Less than 1 week, 10-30 hrs/week - Posted
I am looking for a rock star electrical engineer who is familiar with the STM32F4 MCU family to review the Altium schematics files for our product. Your own designs must always work as expected the first time, and your review must ensure the same for our product. The schematics include 10-15 modules with around 20 distinct ICs and many discrete components. I would expect a skilled engineer could do a thorough review in 8-16 hours. I'm looking for someone who can do a more thorough review within 8 hours. I expect the review to be complete within 48 hours after we agree to terms on the job. I'm not interested in working with a project manager or a team. I would need a signed NDA before I can send the review materials.
Skills: Circuit Design Electrical engineering PCB Design
Hourly - Expert ($$$) - 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
Fixed-Price - Intermediate ($$) - Est. Budget: $5 - Posted
Hello, We are seeking a knowledable, well established, experienced freelancer in the area of electronic circuit design, firmware development, and PC application development for the programming of our new LED module. We are designing a new LED module/light for the mobile industry i.e. automotive industry. Contractor must be able to provide: 1. On time design of electronic LED circuit to meet our requirements. 2. On time development of firmware for this LED module. 3. The development of a PC application so that we may modify firmware varibles and program the module locally. 4. Understand and speak English fluently. Some of the basic requirements of the design will be as follows: - The size of the board will be approximately 2.40" long x .540" wide. We can provide the board dimensions and preferred position of LED's and margins on edges. - We will anticipate that it will be .062" board thickness unless you specify otherwise. - The number of layers required will be determined by the designer. - At this time, we prefer MicroChip processors. Please advise. - There will be (3 pcs) of super bright size 5050 SMD LED's on each side of the board. So, on side 1 there will be 3 pcs 5050 SMD on a circuit and on side 2 there will be 3 pcs 505 SMD on its circuit. Total of 6 LED's, 2 circuits. - The circuit must be able to accomodate 12-24 VDC (mobile) supply voltage range. - The circuit must be able to handle normal voltage spikes. - The 5050 SMD's may be of white, red, blue, green, or amber. The board needs to be able to accomodate this if there are different voltage/current requirements for each LED color. - Board must be able to disipate any heat that builds up. - We would like to be able to control the on/off pattern of each LED circuit as well as the LED brightness. So, we should be able to make LED circuits flash or stead on. Also be able to control brightness. Pulse Width Modulation (PWM)?? - I need test/programming pads on the board as we plan to have the ability to program locally with Microchip PicKit3 programmer. - We need you to develop firmware and basic softwware. - We need a PC application in which we can develop hex code to be used with the MicroChip programmer for LED flash patterns for each circuit, brightness of each circuit, etc. Maybe here we also choose the LED color so that the program can accomodate the correct forward voltage/current? I believe this gives you a good idea of the overall scope of the project. To sum it up, it is basically the circuit design of a mobile LED module, firmware development, and PC application for developing hex code/programming locally. Please send us your resume and idea of timeline and cost for this project. Thank you for taking the time to review and comments. Best Regards, Mike
Skills: Circuit Design