Save this Search
     
Sort by:
  • Posted Date
Fixed Price: Not Sure   |  Posted: 23h, 27m ago  |  Ends: 2d, 0h  |   7 Proposals
Hi I'm doing exactly the same project (  [obscured]  /underground-cable-fault-distance-locator ) The only problem is that I need to replace the 8051microcontroller and ADC with the best microcontroller that it has ADC in it and it will do the same job?! The microcontroller I'm using is AT89S52 and outside ADC 8 bits ,single channel IC and take one analogy signal as input I need to replace them with a microcontroller that has built-in ADC, from ATMEL that is the same as AT89S52 but has ADC built-in
Category: Electrical       

I****m89
 [?]
Sign in to view client's details.
| I****m89
|    New Zealand
Fixed Price: Not Sure   |  Posted: Apr 18, 2014  |  Ends: 1d, 18h  |   2 Proposals
Input 16 bit digital word, updated no more often then once per us. NON-ISOLATED OUTPUT Impedance: 50 ohm Amplitude 20 Vpp into 500 or greater ohm load, 20 mA 1mV step size maximum Short Circuit protected Resolution 1mV steps up to pulse amplitudes <= +/- 2000mV p-p 10mV steps for pulse amplitudes > +/- 2000mV p-p Amplitude Accuracy (Error) 0.1% + 0.1 mV of setting in ambient of 5 deg C Slew Rate 20V / us Rise /Fall time (square waves) <100nS Offset Range 0 to +/- 10V Offset Accuracy (Error) 2% +0.2mV of setting Noise <1mVrms 10Hz to 100kHz or better ISOLATED OUTPUT Type Output isolated from ground by transformer or optical components Rating 1500Vrms, >100MegOhms, Better than 50pF @ 100Hz Output converted to constant current if requested: 200Vp-p maximum 1V/V 10V/V 100V/V 100mA maximum 1uA/V 10uA/V 100uA/V 1mA/V 10mA/V Sufficient power (40W
Category: Electrical       

I****eth
 [?]
Sign in to view client's details.
| I****eth
|    United States
Fixed Price: Less than $500   |  Posted: Apr 07, 2014  |  Ends: 2d, 14h  |   9 Proposals
Hello, I have a project i have been working on I am building a wireless power transfer system that should work as far as 50 feet and should power multiple devise like laptop and cell phone at the same time. I have build a smaller model of this but i need help building a larger one the. at the end of this project i will need you to also build it physical and ship it to me i will pay for the cost of shipping and the parts needed for this the cost of building this should not be more then $50 USD the wireless devices should work in all 4 directions not just one directions. please let me know the cost of this project and how long it will take to do it. this is the Schematic   [obscured]  /img/bezdratovy-prenos-energie/wet.gif references i used to build my device   [obscured]  /bezdratovy-prenos-energie.php   [obscured]  /watch?v=r1UT4NuygmQ
Category: Electrical       
Preferred Location: Western Europe, Eastern Europe, India/Southern Asia, Eastern Asia, Middle East & Central Asia, Central & South America

s****500
 [?]
Sign in to view client's details.
| s****500
|    United States
Fixed Price: Less than $500   |  Posted: Apr 07, 2014  |  Ends: 2d, 13h  |   14 Proposals
Hi, I would like to hire someone for building an actual prototype of one of my concept. It requires mechanical engineering and little electronics. Please let me know if you would be interested in such kind of project. Regards Arif Jahangir
Category: Mechanical       
Skills: Electronics, Mechanical Engineering       

a****123
 [?]
Sign in to view client's details.
| a****123 *
|    Canada
Fixed Price: Less than $500   |  Posted: Apr 07, 2014  |  Ends: 2d, 13h  |   5 Proposals
Hi, I would like to hire someone for building an actual prototype of one of my concept. It requires mechanical engineering and little electronics. Please let me know if you would be interested in such kind of project. Regards Arif Jahangir
Category: Mechanical       

a****123
 [?]
Sign in to view client's details.
| a****123 *
|    Canada
Fixed Price: Less than $500   |  Posted: Apr 07, 2014  |  Ends: 2d, 13h  |   1 Proposal
Hi, I would like to hire someone for building an actual prototype of one of my concept. It requires mechanical engineering and little electronics. Please let me know if you would be interested in such kind of project. Regards Arif Jahangir
Category: Mechanical       

a****123
 [?]
Sign in to view client's details.
| a****123 *
|    Canada
Fixed Price: Not Sure   |  Posted: Apr 07, 2014  |  Ends: 2d, 11h  |   24 Proposals
Hello everyone, we need an expert in PCB design for the design of a fractional motor control board. 3" by 4". Frankly, not a difficult task for someone that knows what they are doing. Thank you! Nikoleta
Category: Electrical       
Preferred Location: North America

b****ana
 [?]
Sign in to view client's details.
| b****ana
|    United States
Fixed Price: More than $10,000   |  Posted: Apr 06, 2014  |  Ends: 1d, 10h  |   4 Proposals
Looking for future business with supplier/manufacturer that makes simple tubs in different sizes. (Pre workout, BCAA, Creatine, Protein Powder etc tubs)
Category: Mechanical       

T****ver
 [?]
Sign in to view client's details.
| T****ver
|    Sweden
Fixed Price: $200 - $600   |  Posted: Apr 01, 2014  |  Ends: 1d, 20h  |   24 Proposals
I have a board that was designed in 6 layers, using a blind via and very small trace paths, and as result has increased the production cost greatly. What I need is for someone to take the current design schematic, and either separate the design into two independent boards that interface with each other and mount within the same enclosure space, or fix the board so that it is not so closely to produce, meaning increase the trace or component issues. Because of time, I am in need of this fix quickly, in a matter of days not weeks, so that the board can be produced. So if you are selected for the project please do not agree to this unless you have the skillset to complete it within the timeframe required. This is not a, from the ground up project, as the PCB has already been designed. So the project requires the following just to recap: 1. Separate the existing PCB, (BRD file will be provided after award), into two boards one with 4 layers and another with 2 for example, that result...
Category: Electrical       

d****ard
 [?]
Sign in to view client's details.
| d****ard
Symbol Key
Payment method not yet verified
Payment verified
Purchased $1-$500
Purchased $500-$5,000
Purchased more than $5,000
You have already submitted a
proposal to this job