Electrical Jobs

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Hourly - Intermediate ($$) - Est. Time: 1 to 3 months, 10-30 hrs/week - Posted
We run a company that produces LED Controllable Wristbands used for events and concerts. We're looking to redesign the firmware in each wristband, we currently just import the wristbands from our factory in China. Looking for someone with experience in RF development, DMX lighting protocols, LED lighting, wearable technology PCB board design & programming. Key Targets: Being able to control up to 20,000 LED Wristbands using RF. Have dynamic RGB LED control over all wristbands including RGB color mixing, intensity levels, and zone control over DMX lighting. Wristband parts: - all silicone or silicone band with plastic housing. - PCB design including (2) RGB LED's, RF receiver, and (2) CR2032 Batteries Manufacturing cost at scale needs to be $1 or less
Skills: Antenna Design Contract Manufacturing Firmware Engineering Lighting Design Manufacturing Design PCB Design RFID Wearables
Fixed-Price - Intermediate ($$) - Est. Budget: $100 - Posted
Construct a circuit OR identify a used piece of equipment on ebay that can address the following need: We have an Precision Industrial ICP Accelerometer 622B61 622B61/006AC which has 3 axis outputs a low impedance AC voltage signal on the DC bias voltage. The link for the sensor is here: https://www.pcb.com/products.aspx?m=622B61 The vibration transducer output needs to be conditioned to a 0-5 volt output. The Transducer requires an industry standard constant current DC power source. Generally, the power supply contains an 18-30 volt source with a 2 -10 mA constant current diode (CCD). AC coupling and the DC bias voltage" The piezovelocity transducer (PVT), output is an AC signal which represents the physical vibration occurring where the sensor is mounted. This AC signal is superimposed on a DC bias voltage (also referred to as bias output voltage or BOV). The DC bias voltage must be removed so that the AC vibration signal oscillates positive and negative about 0 volts. Removal of the DC bias is usually accomplished with a blocking capacitor, which passes the AC output signal to the acquisition system. Most monitors and sensor power supply units contain this blocking capacitor for AC coupling. I WOULD LIKE A MOVING AVERAGE to have persistence on the 0-5 volt display meter. i.e. The meter (display) 0-5 volt sampling rate is not as fast as the vibration transducer output. Thus a moving average should be taken. If this is a problem, then we can just show the combination (SUM) of all three channels and provide a 1-5 volt output signal. Note, the output of the vibration transducer is linear @ 100m/v per G(acceleration of gravity). It is rated for up to 50 G (5 Volts peak to peak of the AC signal) I would like to be able to add gain to the signal output in the event the signal output is too low (i.e the equipment and the transducer reading) is not generating more than 10 or 15 G acceleration; we would like to increase the gain so the average vibration is in the middle of the meter (2.5 Volts.) You can go to ebay and try to find 2 units that can do the job, you would determine compatibility. But the unit should be sealed if possible, this is a marine environment. Budget can increase with complexity. This might be something off the shelf, or a curciut would have to be made.
Skills: Electrical engineering
Hourly - Intermediate ($$) - Est. Time: 1 to 3 months, 10-30 hrs/week - Posted
I am looking for someone to work with me to develop a mobile app for internal use in my contracting company. At this point, I would just like to have mobile time sheets and material sheets for my staff, that would sync with Quickbooks (desktop or online) to exchange the data. The staff have iPad minis/iPhones and I would need desktop access for my computer. The app would have to pull the customer / job database from Quickbooks (daily or on demand) and create a drop town menu in the app (both time sheets and material sheets) for the staff to select. Then the data entered would be synced back to Quickbooks. Right now we use TSheets (www.tsheets.com) for the time sheets side and it does everything above plus scheduling. The Quickbooks integration of the field entered data is not very refined (it does a lot but not effectively in any one area) though and creates lots of problems on invoicing. No material sheets are available from Tsheets. We use a Numbers cloud based spreadsheet for the material sheets (I have attached a sample) and while it works fairly well, it does not sync with Quickbooks and therefor the customer / job name is really whatever my staff chooses to type in rather than choosing only from available, existing job names (pulled from QB). I would at least need desktop back end access to build and maintain an Inventory list (as in the attached spreadsheet) but it would be even better if we could pull that from QB too and create a dropdown. There would have to be an approval process before the sync too. In an ideal world, I would dispatch a job from the schedule (customer for the job is pulled from QB customer list) and send an invite. The staff member could click on the customer in the invite (that shows up in his schedule) to create his timesheet and a material sheet. The charges (time and material) would be defaulted to the customer I set in the invite. The whole point is to get the time AND material imported into QB under the same customer/job name. What happens now is the time through TSheets is generally right (its included in the invite) but the material is assigned randomly to a name somewhat close to what it really is. Makes for a mess of interpretations at invoicing. The idea is to make this simple, simple, simple. New staff has to be able to pick it up immediately and work with it. What other information would you need to start something like this?
Skills: iPad App Development iPhone App Development Swift
Fixed-Price - Intermediate ($$) - Est. Budget: $10 - Posted
Design Specifications: • Final deliverables should be on .ai, .psd or .eps and a .png image • No color limit • Minimum image size is 4000 x 4000 px To be qualified for this project, place Creative at the top of your cover letter, attach samples of your work and do this trial design "Getting My Electrics Ready for Tekken 7" with Jin Kazama as the character.
Hourly - Intermediate ($$) - Est. Time: 1 to 3 months, Less than 10 hrs/week - Posted
We need you to take over existing instrumentation diagram and use it to develop functional electrical circuit with control unit, power supply, pump, sensors, cabling, battery, power connection to system. ... We need you to consider best off the shelf components for all required electrical parts and incorporate them into design. Hopefully you will be able to use Solidworks with electrical routing add in to be able to contribute to existing mechanical design with electrical components and cabling. ... Hopefully you will be able to use Solidworks with electrical routing add in to be able to contribute to existing mechanical design with electrical components and cabling.
Hourly - Intermediate ($$) - Est. Time: Less than 1 month, Less than 10 hrs/week - Posted
Looking for an Amazon.com PPC expert to audit our account, look for opportunities and consult on ongoing and eliminate unnecessary wast.
Fixed-Price - Intermediate ($$) - Est. Budget: $100 - Posted
A General Guideline for the Report • Title of the project • Author and affiliation • Abstract (half pages) • Keywords (5-10 keywords) 1. Introduction (2-3 pages) - General Background - Motivation - Objectives 2. Literature Review (3-5 pages) - Mainly journal papers, books, book chapters and conferences 3. Experimental (2-3 pages) - Materials (what materials that other authors used) - Methods (what methods that other authors used) 4. Results and Discussion (8-10 pages) 5. Summary / Conclusions (0.5-1 pages) 6. Future Work (half pages) 7. References (20-30 references) 8. Appendix (if needed, 1-3 pages)
Skills: Academic Writing Mechanical Engineering report writing