Circuit Design Jobs

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Fixed-Price - Intermediate ($$) - Est. Budget: $5 - Posted
Hello, We are seeking a knowledable, well established, experienced freelancer in the area of electronic circuit design, firmware development, and PC application development for the programming of our new LED module. We are designing a new LED module/light for the mobile industry i.e. automotive industry. Contractor must be able to provide: 1. On time design of electronic LED circuit to meet our requirements. 2. On time development of firmware for this LED module. 3. The development of a PC application so that we may modify firmware varibles and program the module locally. 4. Understand and speak English fluently. Some of the basic requirements of the design will be as follows: - The size of the board will be approximately 2.40" long x .540" wide. We can provide the board dimensions and preferred position of LED's and margins on edges. - We will anticipate that it will be .062" board thickness unless you specify otherwise. - The number of layers required will be determined by the designer. - At this time, we prefer MicroChip processors. Please advise. - There will be (3 pcs) of super bright size 5050 SMD LED's on each side of the board. So, on side 1 there will be 3 pcs 5050 SMD on a circuit and on side 2 there will be 3 pcs 505 SMD on its circuit. Total of 6 LED's, 2 circuits. - The circuit must be able to accomodate 12-24 VDC (mobile) supply voltage range. - The circuit must be able to handle normal voltage spikes. - The 5050 SMD's may be of white, red, blue, green, or amber. The board needs to be able to accomodate this if there are different voltage/current requirements for each LED color. - Board must be able to disipate any heat that builds up. - We would like to be able to control the on/off pattern of each LED circuit as well as the LED brightness. So, we should be able to make LED circuits flash or stead on. Also be able to control brightness. Pulse Width Modulation (PWM)?? - I need test/programming pads on the board as we plan to have the ability to program locally with Microchip PicKit3 programmer. - We need you to develop firmware and basic softwware. - We need a PC application in which we can develop hex code to be used with the MicroChip programmer for LED flash patterns for each circuit, brightness of each circuit, etc. Maybe here we also choose the LED color so that the program can accomodate the correct forward voltage/current? I believe this gives you a good idea of the overall scope of the project. To sum it up, it is basically the circuit design of a mobile LED module, firmware development, and PC application for developing hex code/programming locally. Please send us your resume and idea of timeline and cost for this project. Thank you for taking the time to review and comments. Best Regards, Mike
Skills: Circuit Design
Fixed-Price - Intermediate ($$) - Est. Budget: $75 - Posted
I designed a simple circuit using 4 ICs and want to refine the design by creating a software prototyple in a tool such a Fritzing. 1. 74147: 9 inputs, to 4 binary outputs 2. 7400: inverter for 4 binary outputs 3. 7447 (x2): display driver I want it powered by rechargeable 18650 battery powerpack or maybe AA. Inputs: 10 position rotary switch Output: 2 x 7 Segment Displays: Work done: Create this circuit design in software such as Fritzing.
Skills: Circuit Design Integrated Circuits
Hourly - Intermediate ($$) - Est. Time: Less than 1 week, 10-30 hrs/week - Posted
Looking for schematic design and firmware programming for a single-cell LiPo fuel gauge. The circuit should use a MAX1704 as per the attached circuit, connected to an ATtiny44 with which the MAX should communicate over SPI. One red LED and 4 green LEDs connected directly to 5 of the ATtiny outputs, and a pushbutton switch on one input. Pressing the pushbutton should show the battery charge status for about 5 seconds, then switch all LEDs off. On power-on the battery charge status should also be shown for 5 seconds.
Skills: Circuit Design Atmel AVR Embedded Systems
Fixed-Price - Intermediate ($$) - Est. Budget: $200 - Posted
We have an EagleCAD PCB for which we need redesigning. There are certain components which need to be removed. Some components need to be added. Further position redesigning for decreasing the size of the board. We have the circuits which need to be added and removed. Further all jumpers or connectors are also to be removed. This is the Linkit ONE board on which we have made changes. As this is a prototype board it has provision for connectors which we do not need in our end product.
Skills: Circuit Design Eagle Electrical engineering Electronic Design
Fixed-Price - Intermediate ($$) - Est. Budget: $50 - Posted
Dear engineer ! I would like to have a simple smallest USB audio adapter. Connect to 4 wires of usb other is 4 lines 3.5 mm headphone with mic jack Please look at my image and read data sheet to CM119B size 1.5cmx3cm Using chip set CM119B or similar Thank you !
Skills: Circuit Design
Fixed-Price - Entry Level ($) - Est. Budget: $1,000 - Posted
Looking for a power supply design engineer who specializes in designing transformer for High voltage power conversion circuit . Looking for DC-DC converter with following specifications . We already have design ready and would be happy to share information , we are using off the shelf transformer and we are currently power limited due to the transformer . Looking for someone who can get transformer design complete and provide specification and 3 prototypes . Input 12VDC nominal ( 11- 14V range) Output 9 KVDC @ 500 watt power Operating frequency - appx 60khz
Skills: Circuit Design Electrical engineering
Hourly - Intermediate ($$) - Est. Time: More than 6 months, Less than 10 hrs/week - Posted
An exciting contract job has arisen for a gaming company based in London on an ongoing basis. The right candidate will be responsible for circuit design, prototyping and installations based on the concepts we provide. The ideal candidate will need to have a good understanding of Arduino, Raspberries and also designing circuitry layouts. When tendering for the project, please submit a few examples of the projects you have done previously.
Skills: Circuit Design Arduino Raspberry Pi
Fixed-Price - Intermediate ($$) - Est. Budget: $1,000 - Posted
We are looking for somebody with experience with 2.4ghz low power radios to design circuits. If you have experience in this area please contact us for more information about the project. The budget listed is no indication of the real budget so please get in contact with is if you think that you have relevant skills.
Skills: Circuit Design Electrical engineering Firmware Engineering PCB Design
Hourly - Expert ($$$) - Est. Time: 1 to 3 months, 10-30 hrs/week - Posted
I’m working on creating a guitar pedal system that magnetically links together. A cross between a modular synth and a traditional set of guitar pedals. A base pedal that has various pedals that can snap on to the system. Instead of guitarists creating a mix-match board of various pedals and technologies (all with their own power supply and connecting cables mounted onto a separate board), they can connect together a set of pedals that all work and are designed to connect seamlessly together. A system that allows play and re-composing of order to create never-before-heard sounds. (Mainly analog with the occasional use of Midi for specific tasks like tempo setting.) Think little bits (, but for guitar pedals. Think Moog Sonic Six ( as an actual set of independent, connected components on the floor (without the keyboard of course). I need an expert in circuit design (that might also love the audio and synthesizer world). Any expertise in circuit printing, production and assembly would be useful too. Probably start with the core base pedal and then a couple pedals that will prove out the concept. Just a single prototype needed for testing with the goal of larger production based on the business side of things. I have write-ups and concepts for each component​ when we get to that point in discussion.
Skills: Circuit Design Analog Electronics Audio Engineering PCB Design