Circuit Design Jobs

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Fixed-Price - Intermediate ($$) - Est. Budget: $40 - Posted
We are using the following module: https://www.amazon.com/gp/product/B00BYRJXGA/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 This module accepts 36v from a regulated power supply and turns it into a variable voltage power line for a resistive heating element. We want to replace the module with through hole components on our own board. Working output voltage will be from 3.0 up to 5.0 volts with maximum of 10A currnet. Deliverables include BOM with Digikey/Mouser part numbers, schematic & wiring diagram, and answering any questions along the way. Payment will be released after parts are received and tested on a breadboard (2-3 working days).
Skills: Circuit Design Electrical engineering Electronic Design Electronics
Fixed-Price - Expert ($$$) - Est. Budget: $5 - Posted
Looking for an experienced RF engineer capable of PCB design (preferably on ADS or Altium). Currently we have a PCB design that accommodates a state-of-the-art 122 pin chip. However, the current design relies on external SMA connections to connect to two hybrid couplers and 2 3db couplers. I need to have these couplers on the transmission lines of my PCB and shrink the size of the board. Also, to achieve this goal, we need to replace a D-sub with a micro-D connector.
Skills: Circuit Design Altium Designer Analog Electronics Electrical engineering
Fixed-Price - Expert ($$$) - Est. Budget: $7,000 - Posted
Looking for 6-8 months project related converting cad designs (pixels in designs) to stepper motor/solenoid valve movement (similar in the lines of 3D printer working), need for experience in dealing with very small scale stepper motors/solenoid valves with high numbers operating in sync with the design pattern at a single point in time. some key expertise looking for 1) CAD software 2) Micro-controller programming 3) Stepper motor/solenoid valve programming 3) 3d printing of modules assembly (for prototyping and future production) 4) Experience in building prototype of machines 5) Basic physics If you suit the above criteria and are willing to sign NDA before i disclose the project in detail please contact me
Skills: Circuit Design 3D Modeling Arduino Device Driver Development
Hourly - Intermediate ($$) - Est. Time: Less than 1 week, Less than 10 hrs/week - Posted
Looking for someone to design a custom module for the Tessel 2 ( www.tessel.io ). Similar to the servo module ( http://tessel.github.io/t2-start/modules/servo.html ), but instead of the 3-pin connectors it would have connectors for an 8-pin molex cable for clearpath motors ( https://www.teknic.com/model-info/CPM-MCPV-3441P-RLN/ ).
Skills: Circuit Design Arduino Electrical Drawing Microcontroller Design
Hourly - Intermediate ($$) - Est. Time: 1 to 3 months, 30+ hrs/week - Posted
We are designing some remote wireless sensor devices for various markets including consumer and business customers. These sensors could monitor a variety of inputs including temperature, humidity, motion, AC current, water flow. The sensors will provide Web feedback and or remote control to customers by E-mail, text messages, web pages and Smart Phone Apps. The sensors may also switch off and on local devices such as lights, pumps or dry contact switches. We are looking for suggestions for hardware devices to provide the Client end and also programming both the devices and the customer interface side ie: Web page, Text messages, smart phone Apps. Please provide your your suggested hardware recommendations and quote your time to build a working prototype and a customer interface. Follow on work will depend on the success for the 1st working prototype.
Skills: Circuit Design Electronics Embedded C Web design
Hourly - Intermediate ($$) - Est. Time: Less than 1 week, Less than 10 hrs/week - Posted
I am looking to power several devices using one power source rather than one power adapter per device (which in case of digital cameras seems to be the only option). I need a schematic so I can build a PCB which would allow me to plug in several (e.g. up to 6) devices at once but making sure I don't blow up anything if not all outputs are used (like my current setup, which obviously failed). Possible specs are 6 outputs of 8VDC @ 2A each, protected against over-voltage and over-current to protect camera equipment. Current cameras I'm using are Nikon D3300, in case you need to look up existing power supplies or battery solutions. Also perhaps Nikon D810. Depending on the complexity I may also have you design the PCB.
Skills: Circuit Design Electronics PCB Design
Fixed-Price - Intermediate ($$) - Est. Budget: $500 - Posted
Hello, I am working on a new type of interactive toy that records 5-10 seconds of audio (ex. human speech) and then sings the recorded back in a variety of musical styles (rap, jazz. etc.). The toy must also be able to add random words and phrases to the pre-recorded text, such as "cool", "I love it", etc. Previous experience in circuit design, software & hardware to record and process sound is required. Contact me for more details.
Skills: Circuit Design Audio Engineering Electronic Design Embedded Systems
Hourly - Intermediate ($$) - Est. Time: Less than 1 month, Less than 10 hrs/week - Posted
I want to make a wearable device that would have a microphone that would pick up speech and send the audio via bluetooth to a speech to text iphone app I have already completed. Then the app would send the text message generated to a screen on the wearable device. Am thinking either Arduino or Rasberry Pi (or something better?)
Skills: Circuit Design Arduino Electronics iPhone UI Design