Circuit Design Jobs

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Hourly - Entry Level ($) - Est. Time: Less than 1 month, 10-30 hrs/week - Posted
I'm looking for someone to help me with the PCB designs that I'm working on. At first I would just want this person to help me with creation of schematic symbols and component footprints. If someone is able to do a good job with these things, then I may want to get help with getting actual layout help. We could start with me sending several datasheets for components that I need schematic symbols and footprints made for and go from there. I'm hoping to find someone who can support my electrical design work on an ongoing basis.
Skills: Circuit Design Electrical Drawing Electrical engineering PCB Design
Fixed-Price - Intermediate ($$) - Est. Budget: $100 - Posted
We are a start-up working on building true wireless earbuds with a capsule that charges the earbuds wirelessly. At this stage of the development we have all the engineering docs of the product but more improvement is required, on the charging system and a few other things so we are able to start the mass-production. We are looking to hire Electrical engineer to work with our team to fix the charging issue and a few other things. more details will be shared after we hire. What needs to be done: Fixing the earbuds and the capsule charging issues PCB, firmware and BOM analysis Play and stop button issue Technical Documentations More details will be shared after we hire. Thank you
Skills: Circuit Design Altium Designer Digital Electronics Electrical Drawing
Fixed-Price - Intermediate ($$) - Est. Budget: $250 - Posted
Looking for someone who is capable of creating a layout and fabricating a PCB equipped with a microcontroller, bluetooth or wifi and two electrodes that will measure the conductivity of a liquid solution that comes into contact with them. This board would have to be optimized to as small a size as possible. That measured conductivity data would have to be able to be wirelessly transmitted via bluetooth or wifi to a smart device (laptop, phone). An app would also be developed later on to display conductivity data.
Skills: Circuit Design Electrical engineering iPhone App Development Mobile Programming
Hourly - Intermediate ($$) - Est. Time: 3 to 6 months, Less than 10 hrs/week - Posted
Looking for Electronics/Hardware Engineer with experience in developing devices with Thunderbolt interface. PCB should have standard PCI-Express connector to handle PCI-Express cards, powered by 12V input and connected to PC with Thunderbolt port.
Skills: Circuit Design Electrical Drawing Electrical engineering Electronic Design
Hourly - Intermediate ($$) - Est. Time: Less than 1 month, 10-30 hrs/week - Posted
Looking to create a prototype for a Bluetooth based device that can be remotely controlled from a mobile app. You'll need to have a proven experience of creating a low voltage devices, be comfortable designing circuit boards and creating a prototype. Big plus if you created a similar integration between IoT (Internet of Things) and mobile apps. You will not need to create the mobile app but you'll need to work with the rest of the team to enable the platform which the will run the firmware. Do you enjoy working with Microcontrollers such as Arduino or Raspberry Pie? Then this project might be of interest to you.
Skills: Circuit Design Arduino Bluetooth Digital Signal Processing
Hourly - Expert ($$$) - Est. Time: Less than 1 month, 10-30 hrs/week - Posted
>> Overview This project involves the schematic design and PCB layout of the UI elements of an Arduino Mega controlled coffee machine. The UI elements consists of four sets of the following: a 3 digit 7 segment display, a 128x32 SSD1306 based OLED display, and a rotary encoder. >> Deliverables Step 1: A. Discuss I2C vs. SPI, and library choice (e.g. Pins required, refresh rate, memory usage) B. Clarify code implementation C. Calculate power consumption to help me size a power supply Step 2 A. Schematic in an image/pdf format B. Bill of materials C. Compilable example code for the Arduino IDE, using either Arduino Nano or Mega Step 3 A. PCB layout files, ready to send to board house. B. Source files (Eagle preferred, but not required) >> Components Please see attachment for the board layout, component footprints and links to datasheets. The “dashboard” consists of four sets of three elements each, with two sets on each PCB: 1. A three digit, common cathode 7 segment display 2. A 128x32 OLED display with SSD1306 driver 3. A incremental rotary encoder with a pushbutton, Bourns PEC With the exception of the above, surface mount components are preferred, and should all be on the same side of the board. I’ll most likely be hand assembling the boards, so layouts and component sizes that facilitates that would be appreciated. A ribbon cable connects the microcontroller board to PCB1, and a separate ribbon cable connects PCB1 and PCB2. If it makes more sense (/is better practice) to connect each PCB directly to the microcontroller PCB, then that’s fine too. >> Implementation notes These are all suggestions - I don’t know what I don’t know, so I’m open to your advice if there are better approaches. I’d like to prioritize robustness and doing it properly, rather than trying to minimize costs. Similarly, accompanying code should be easy to understand and maintain - the code will be open source, so please take advantage of open source libraries (i.e. ledcontrol, adafruit_ssd1306,adafruit_gfx, u8glib). The 7 segment displays could be driven by two MAX7219 (one per PCB, daisy chained), and controlled by the LedControl library. The OLED displays are packaged as a module. They are available as SPI or I2C versions. The i2c versions all have the same i2c address, so may need an i2c multiplexer (i.e. TCA9548A) /i2c address translator (LTC4316), or another alternative I’m not aware of. I need help deciding whether to go with I2C or SPI versions. They only need to display static text for now. The circuits for the rotary encoder should include hardware debouncing. The bourns datasheet includes a sample application circuit. I have no preference for whether it should be interrupt based, but if that provides better performance / reliability (and is the “proper way” to implement rotary encoders), then that’s fine too. >> Example Code The code should be packaged as a library. The library should (probably?) extend the existing OLED / 7 segment library functions so that they're addressable based on their location on the PCB (i.e. locations 0,1,2,3 from left to right). The example code should use this library to increment/decrement the value displayed on the 7 segment display using the corresponding rotary encoder. Pressing the button should toggle both the corresponding OLED and 7 segment display on and off.
Skills: Circuit Design Arduino PCB Design
Fixed-Price - Expert ($$$) - Est. Budget: $500 - Posted
I have a schematic diagram of embedded micro design , which is hand drawn on paper. I want to convert to a electronic schematic diagram and PCB layout diagram. We will make 10 prototypes ASAP. I prefer Protel/ Altium. It involves a little RF but the RF is already on its own PCB. Compact layout (ie small size) is required Circuit mainly contains lithium battery (CR2450, Microchip embedded uController, Microchip RF module with antenna, few IO, Pizzo buzzer. Can you guys help and how do you cost this? How soon can you start. We may look at you RF skills as well in future for custom development
Skills: Circuit Design Antenna Design Electronics Embedded Systems