Circuit Design Jobs

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Fixed-Price - Intermediate ($$) - Est. Budget: $250 - Posted
Seeking an experienced electrical engineer or technician to redesign a 42A LT3751 charging circuit for use in a prototype board. Possibility of work on more extensive full production circuit if design is good. Required: Experience working in Eagle, experience with LTSpice simulation software, strong background in DC-DC flyback converters, capacitor charge controller operation. Preferred: Electrical engineering degree
Skills: Circuit Design Eagle Electrical Drawing Electrical engineering
Fixed-Price - Intermediate ($$) - Est. Budget: $100 - Posted
Need a circuit design schematic with component details and explanation of how the circuit works for LiFePO4 Battery Charger & Battery Management System. There are many open source designs available on the internet. Most of these are based on dumping extra charge to resistors for balancing each cell. We would prefer if there is a more efficient way to charge and balance the cells. The details are in the attached document. If you have existing design/s close to our requirements, that would work as well. Please let me know if you have any questions. Thanks. Vijay
Skills: Circuit Design Electrical engineering Integrated Circuits
Hourly - Intermediate ($$) - Est. Time: 1 to 3 months, Less than 10 hrs/week - Posted
Looking for an experienced Electronic Circuit Designer and Microcontroller Programmer who has worked with Low-Power Microcontrollers like MSP430 and PIC. We are interested in designing an electronic circuit consisting of a low-power microcontroller to sense, collect and transform the data. The microcontroller would be connected to a Bluetooth Low Energy (BLE) chip to advertise the final desired data to smartphones. We want the whole circuit to be working on power generated by Smartphone's audio jack. Further specifications available for applicants to review upon request.
Skills: Circuit Design Analog Electronics Digital Electronics Electronics
Fixed-Price - Expert ($$$) - Est. Budget: $100 - Posted
Hello i am looking for a hardware circuit/schematic design engineer who is very good is designing circuits/schematics. Basically i have a schematics which needs to be modified. i have one sierra wireless aircard 320U connected to the USB1 i have one TL-WN722N wireless USB adapter (wifi) connected to USB2 your tasks 1) now we will use Sierra Wireless Airprime MC7355 to be connected to mini PCIe M.2 slot hence we need to design a circuit so that host can talk to the modem on mini PCIe slot and obviously the modem must be connected to the SIM card slot. 2) and wifi must communicate with the host with some reasonable bus. in other words this usb must talk to our hardware 3) we need to add RS232 , RS485 ports to the schematics as well. Pre-requistes: please make sure you have worked on designing circuits involving sierra wireless airprime with PCIe slot and wifi as well Regards
Skills: Circuit Design Computer Hardware Design Integrated Circuits PCB Design
Fixed-Price - Intermediate ($$) - Est. Budget: $125 - Posted
For this job, you will be required to complete a total of 6 lab reports (Labs 4 + 6-10) and simulate digital logic circuits in a program such as Logisim ( or LogicWorks or any digital logic simulator. You must use simulation software to check your work and build schematics, saving schematic files, as well as taking screenshots of the schematics being simulated successfully. You will need to save every Logisim/simulated schematic file (.circ) as you build it while completing the steps of each procedure in each experiment and submit with a well formatted report. When submitting for review, you will send the report, the .circ file, any screenshots of a simulated circuit, and any other relevant information/data. Laboratory Experiments 1-3 and Lab 5 have already been completed. You will only need to do Experiments #4 and #6-10. View the EXAMPLE files to see how the work was done and how to set up and format properly. I have included COMPLETE examples of Labs 2, 3, and 5. You can view INCOMPLETE and possibly inaccurate Lab examples 6, 7, and 8. However, these may be incorrect results and still do not have the simulated digital circuit. The only real work is completing the questions, any calculations, and creating the schematic being simulated for the lab experiment. Skills required: Electronics, Digital Logic, Circuitry, Knowledge of Components, etc. Compensation is negotiable depending on your skills and how well you do on the reports.
Skills: Circuit Design Digital Electronics Electrical engineering Electronic Workbench
Fixed-Price - Intermediate ($$) - Est. Budget: $500 - Posted
Hello, I am working on a new type of interactive puzzle maze toy which responds to player actions (ex. tilting the toy, driving the metal ball to a specific destination, etc.) by playing pre-recorded sounds and flashing LEDs This toy is similar to Rubiks Rock&Roll maze: Previous experience in circuit design, software & hardware to manufacture interactive consumer products is desired. Contact me for more details.
Skills: Circuit Design Audio Engineering Electronic Design Embedded Systems
Hourly - Intermediate ($$) - Est. Time: Less than 1 month, Less than 10 hrs/week - Posted
Greetings, We are in the midst of developing a wearable device for infants to measure BLOOD OXYGEN, HEART RATE AND BODY CORE TEMPERATURE. The wearable needs to be bluetooth integrated where the data is remotely transmitted to a Windows application where the staff will remote monitor device data. We prefer using Maxim sensor and a reliable but easy way to measure body core temperature. We need product design help as well to enclose the PCB. The PCB will be charged either by Micro USB or magnetic clip like most smartwatches. All interested participants SHOULD have the following experience: - MAXIM PULSE OXIMETER SENSORS - HEALTHCARE WEARABLES FROM CONCEPT TO PRODUCTION FOR INFANTS - PRODUCT DESIGN FOR WEARABLES FOR INFANTS Looking forward to all proposals.
Skills: Circuit Design Bluetooth Electronic Design Embedded Systems
Fixed-Price - Expert ($$$) - Est. Budget: $2,000 - Posted
We need a schematic for a digitally controlled variable power supply that can switch between AC and DC and can switch polarity for DC voltages. Needs to be stable and precise. Voltages need to vary from 0 to 30V, and 0 to 5 amps. This needs to all be controlled by a Raspberry Pi 3. We can handle all the programming - just need the circuit design.
Skills: Circuit Design Electrical engineering
Hourly - Intermediate ($$) - Est. Time: 3 to 6 months, 10-30 hrs/week - Posted
Looking a hardware engineer ready to handle the design of a PCB starting from scratch to the first prototype or design for production. Schematics, components sourcing, PCB design. We currently have a prototype of our product using a Metawear CPro ( ), a NeoPixel LED ring, an FSR and a battery. To get closer to production, we need our own PCB, and that's where you come in ! You will be working on a wearable device with the following components and sensors : - BLE - gyro / accelerometer - magnetometer - Lithium battery - 12 RGB LEDs Ongoing project, no rush.
Skills: Circuit Design Electrical Drawing Electrical engineering PCB Design