Circuit Design Jobs

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Fixed-Price - Expert ($$$) - Est. Budget: $5 - Posted
I have a 12V solar surface pump which requires a circuit to do the following: When the pump first runs (power from the existing pump controller is sent to the pump), I need a circuit which detects the power sent from the controller, opens a 12V sprinkler value for one -two minutes, then shuts down. When the storage tank is full, a float signals to the pump controller to shut down. When the water level falls, the float tells the pump controller to activate the pump again. Every time power is detected at the pump, I want the sprinkler value to open for two minutes then shut down. I noticed after experimenting with the pump, it will pump fine to the storage tank if it can run with very little water pressure for a couple minutes. Right now, I am manually opening a spigot right by the pump when it starts and then closing the spigot down when the pump starts working. If I don't open the spigot, there is just too much water pressure up to the storage tank for the pump to work. If I don't open the spigot, the pump will run for hours but won't actually pump any water to the storage tank which is about 20 feet above the water source. Just by opening the spigot, lets the pump build enough pressure to work just fine. This is the water solenoid switch https://www.amazon.com/Fafada-Electric-Solenoid-Switch-Normally/dp/B00MP5WY3Y/ref=sr_1_1?ie=UTF8&qid=1474901209&sr=8-1&keywords=12v+water+solenoid This is the 12V surface pump https://www.amazon.com/gp/product/B002MWFFVS/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 This is the 12V pump controller: http://realgoods.com/linear-current-booster-pump-controller-10a-ppt-12-24-10
Skills: Circuit Design Arduino Microcontroller Design
Fixed-Price - Intermediate ($$) - 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 ($$) - Est. Budget: $250 - Posted
Looking for someone who is capable of creating a layout and fabricating a PCB equipped with a microcontroller, bluetooth or wifi and two electrodes that will measure the conductivity of a liquid solution that comes into contact with them. This board would have to be optimized to as small a size as possible. That measured conductivity data would have to be able to be wirelessly transmitted via bluetooth or wifi to a smart device (laptop, phone). An app would also be developed later on to display conductivity data.
Skills: Circuit Design Electrical engineering iPhone App Development Mobile Programming
Fixed-Price - Expert ($$$) - 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
Fixed-Price - Expert ($$$) - Est. Budget: $4,000 - Posted
i looking for an expert , who will design and develop a tracking system which can be controlled and accessed via an android application, this design will also include All PCB Deliverables of the system. BASIC REQUIREMENTS -Very Good communication skills. -Strictly top professionals. -Excellent online presence. EXPECTED OUTPUT -Circuit design of the entire GPS system -ALL PCB outputs -GPS Android Application NOTE: This is a two step project, i require two separate individuals, to design this individually, when the job is completed, the individual with a more excellent output would get a Main contract for a similar job but on a much more Larger Scale. Good luck.
Skills: Circuit Design Android App Development Electrical engineering Electronic Design
Fixed-Price - Expert ($$$) - Est. Budget: $1,500 - Posted
I am looking for an experienced electrical engineer / hardware designer to design a PCB with the following specifications: Basically, the project can be seen like adding a Raspberry Pi 3 to an Arduino Mega 256 with added input and output handling of industrial compatible signals. The input section consists of 4x or 8x analog input of 24V DC as well as one or two power-based inputs of 0-20mA of the same voltage. Digital Inputs of 24V DC are also needed. All Inputs should be isolated from the inner circuit. The output section consists of 8x digital outputs which have 24V and are solid-state or relay based. In case of the latter the used relays should be capable of handling up to 230V AC at a moderate load. A different combination would be having 4x 24V solid state and 4x 230V relay based outputs. As mentioned above the unit will be used in industrial-like environments so it is highly required to isolate the i/o section from the inner circuit through some kind of protection circuit. All the I/Os should be connected to the ATmega2560. The ATmega itself will be connected to the Raspberry Pi over one of its UART. To provide Arduino compatibility the Arduino-typical automatic reset-circuit should be implemented as well. So basically it's based on the open source schematic from Arduino. The I/O section should also feature LED-based indicator whether a channel is set or not. Also very important, the UART, SPI and I2C should be carried over to a connector so that additional modules can connect to the board later on. The Raspberry Pi 3 will be plugged onto the board from the top and upside down. In the middle of the PCB there should be some connectors and screw-holes to match the footprint of the Raspberry Pi. The whole circuit should be integrated on a single PCB with a dimension of about 16x16cm. I can provide more detailed informations as well as some basic sketches of how I imagine the circuit or elements connected to each other. But I think that this information is enough to get an overview of the size of the project. Please feel free to ask any question!
Skills: Circuit Design Electrical Drawing Electrical engineering Electronics
Fixed-Price - Expert ($$$) - Est. Budget: $5 - Posted
Looking for a person that can design a joystick that can control two motors via bluetooth. This means doing the circuitry/programming aswell as designing the joystick itself. I do however a PS3 joystick that controls two motors via bluetooth, so you might be able to reuse some of that code. Im imagining a product looking something like the "Zeemote" joystick, which you can google.
Skills: Circuit Design Arduino AutoCAD Electronics