Circuit Design Jobs

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Fixed-Price - Intermediate ($$) - Est. Budget: $100 - Posted
Hello Freelancers, I'm looking for an electrical engineer to: 1) Design a compact circuit. 2) Source the components from Australian suppliers (where possible). 3) Label the diagram: 3.A) for a ‘non-engineer’ to understand and assemble. 3.B) provide web links to sourced components. Complete a circuit diagram in PDF, WORD or PUBLISHER file, that satisfies requirements in PROJECT OVERVIEW pdf. Clear communication skills will be a KEY attribute, as you will be working with a 'non-engineer'. Please read attached file PROJECT OVERVIEW pdf. Regards,
Skills: Circuit Design Electrical engineering Electronic Design Electronics
Hourly - Expert ($$$) - Est. Time: 1 to 3 months, Less than 10 hrs/week - Posted
I am interested in updating and adding to an existing medical device known as the NeuRx Diaphragmatic Pacing System (DPS). This system allows quadriplegics and persons with ALS to breathe independently of conventional mechanical ventilation. The DPS uses a fixed number of pulses per minute, which works well, but does not allow the user to experience fluid control over his or her speech pattern. My intent is to reengineer the electronic control box that regulates varying inputs and to incorporate a pressure sensor into it. This will allow the user to draw breaths as needed, rather than waiting for the next pulse. I am doing this for personal use only and have no plans or intent to bring thing to market.
Skills: Circuit Design Biotechnology Digital Electronics Electronic Design
Fixed-Price - Intermediate ($$) - Est. Budget: $500 - Posted
Hello, I am working on a new type of interactive toy that pre-records 5-10 seconds of text spoken to it and then sings this text back in a variety of musical styles (rap, jazz. etc.). The toy must also be able to add random words and phrases to the pre-recorded text, such as "cool", "I love it", etc. Previous experience in software & hardware to record and process sound is required. Contact me for more details.
Skills: Circuit Design Audio Engineering Electronic Design Embedded Systems
Fixed-Price - Intermediate ($$) - Est. Budget: $500 - Posted
We are looking for someone with experience in hardware designing and development. We have a sensor which with its amplification circuit produces current between 0-200 milliampere. The amplification board is power by a +/- 5V supply. We need hardware development for the power supply and IoT for the board. The power supply needs to be through a rechargeable battery. First, the current by the sensor is directly proportionate to the PPM levels of the gas it senses. We need the results to be displayed on the system and to be transmitted to an AWS server using GPRS. Then, we need a provisioning for two alarms. E.g. 1st alarm at 2ppm and the 2nd alarm at 5ppm. These alarms will be connected to a hooter and LED lights which will turn on respectively when the alarms go off. There should be provision using buttons to change the value of these alarm levels. The sensors too have some calibrations which need to be done, so there needs to be a provision through which we can set the value of the gas at 0 at that specific current. For e.g, the sensor at 0ppm produces 2.23 milliAmp current. Some other sensor may produce 0.23 milliAmp current at 0ppm. So we can initially calibrate the system so that it shows the correct value. This is our requirement in detail. Please contact me for any queries or clarifications.
Skills: Circuit Design Embedded Systems Integrated Circuits Internet of Things
Hourly - Entry Level ($) - Est. Time: Less than 1 month, 10-30 hrs/week - Posted
I am developing a dynamic lighting system and will need an experienced programmer to be able to code in various customizations within the system. I want to mimic the rise and fall of the sun using artificial light (LED RGB addressable strip) as closely as possible. Therefore on every hour the light will brighten or dim depending on the time in the day. The lights system will cycle through this 12 hour daylight period with 12 different colours depicting the sun and its natural morning, noon or evening light. The light will need an internal clock programmed into it. To track time and produce the right type of light at the right time when it is turned on. Amongst this I would like the user to have some control by developing a phone application to control the colors if they choose to do so. This can be done via a Bluetooth or WIFI connection. control buttons (on/off, bright/dim, color) for the light. The Strips are to be programmed to 6500K blue-rich white light (mid-day sun), to 1800K amber white light (fire/evening light) I need someone who is willing to code all this up! I'm personally not that experienced in this area so initiative will be a plus just run it by me before doing so. Will discuss in full details once best applicant is suited.
Skills: Circuit Design Application Programming Arduino Integrated Circuits
Fixed-Price - Expert ($$$) - Est. Budget: $5 - Posted
Must have experience with CAN bus, J1939, and PGN used on commercial vehicle ECMs. The controller will be an auxiliary control device and use inputs from the ECM, the TPS and the driver while displaying info like mpg, speed, load, power etc. I need a developer to design the circuit, write code and produce several prototypes for testing.
Skills: Circuit Design Electronic Design Embedded Systems PCB Design
Hourly - Expert ($$$) - Est. Time: 1 to 3 months, 10-30 hrs/week - Posted
We are looking for individuals with hands-on development experience on Raspberry Pi platform for motion control, industrial automation and digital/analog I/O. Moreover we need to develop an interactive user interface for the operator to work with such a device on the same platform. Work can be performed largely remotely with periodic meetings with the project lead. All other arrangements are negotiable.
Skills: Circuit Design Automation Digital Signal Processing Integrated Circuits
Fixed-Price - Intermediate ($$) - Est. Budget: $1,000 - Posted
We're looking for somebody who can design a special sound card for us: - symmetrical input stage including Microphone preamplifier - ADC stage - I2S interface - VCTCXO - DAC stage - symmetrical output stage - headphone output stage with volume control You're responsible for component selection, circuit design, PCB routing. Some parts are already selected, we will inform you about it when you have been selected for the job. You need to send us reference work of analog circuits you have designed before (circuit diagram and PCB design). We do not accept any applications without reference work. We prefer PCB designs in KiCAD.
Skills: Circuit Design Analog Electronics PCB Design