Battery equalizer circuit jobs:
| Project Name | Description | Type | Bids | Avg (USD) | Skill Required | Started | Ends | |
|---|---|---|---|---|---|---|---|---|
| Create a charge shuttling battery equalizer like this one: http://www. ... wide voltage range (2V-16V per battery). The maximum amount of current ... to the circuit: -If any battery voltage gets too high or ... above and make a PCB schematic with gerber files for PCB ... | Fixed | 12 | $525 | Electronics, Engineering | Jul 14, 2009 | - | ||
| Create a charge shuttling battery equalizer like this one: http://www.electric-lemon ... what the system is doing- balancing, balanced. -Circuit should enter a low power mode once ... as listed above and make a PCB schematic with gerber files for PCB production. ... | Fixed | 8 | $181 | Electronics | Aug 5, 2009 | - | ||
| ... Picture 1.jpg]. Furthermore voltages of each battery must be monitored once every 10ms ... power sleep mode if variance in battery voltages is within preset parameters. ... 10A Programmable with RS-232 pins Circuit testing and improvements are welcome but ... | Fixed | 0 | Electronics, Engineering | Jul 11, 2009 | - | |||
| ... Picture 1.jpg]. Furthermore voltages of each battery must be monitored once every 10ms ... low power sleep mode if variance in battery voltages is within preset parameters. ... 10A Programmable with RS-232 pins Circuit testing and improvements are welcome but ... | Fixed | 7 | $661 | Electronics, Engineering | Jul 11, 2009 | - | ||
| ... NiMH and NICd batteries packs charge. The battery packs will contain a ... Functionalities: - Charging Ciclyng control - Max charge control based on both voltage ... temperature - Adjustable Cut off circuit - Battery temperature monitor ( to control full ... | Fixed | 29 | $466 | Electrical Engineering, Electronics, Microcontroller, PCB Layout | Aug 17, 2011 | - | ||
| ... within the limitations of a car battery. The circuit is a security unit by nature. ... Alarm light • Transmitter • Receiver The circuit should perform as follows. When the ... I would turn what is probably a simple project for the right person, into a ... | Fixed | 21 | Electronics, Engineering | Jul 15, 2008 | - | |||
| We are looking to develop a SLA battery recharging circuit to be used with our prototypes. Please contact me for further information regarding specific requirements. | Fixed | 20 | $152 | Electrical Engineering, Electronics, Engineering, PCB Layout | Jan 14, 2010 | - | ||
| Battery switch over & charger circuit diagram Background The device is powered ... main functional components to this project: Battery Switch over: 1) The primary power ... will not lose power. Deliverables: 1) Circuit diagram, can be in eagle cad ... | Fixed | 7 | Electronics, Engineering | Nov 13, 2008 | - | |||
| ... 5 volt power supply with a battery charge and supply circuit to ... UPS, without any fancy "on battery" or "supply fail& ... when using a sealed lead acid battery and it must also prevent ... volts @ 1 or 2 amps. Battery is to be connected externally ... | Fixed | 13 | Electronics | May 23, 2008 | - | |||
| ... . THE OFFER SHALL INCLUDE DESIGN OF CIRCUIT, PCB LAYOUT INCLUDING HEAT SINK CALCULATIONS ... MPPT CHARGER TO BE MOUNTED IN BATTERY INPUT CIRCUIT AND 2) LED DRIVERS TO ... CHARGER SHALL HAVE ALL PROTECTIONS INCLUDING BATTERY UV/OV, CHARGING CURRENT LIMITING AND ... | Fixed | 2 | $425 | Product Design | Jan 24, 2012 | - | ||
| ... engineer I need the following.. A simple circuit that is described below and kind of ... use your engineering expertise to design the circuit, the information below is just to ... a space that is about 3X2 inches. Battery operated that will last for about ... | Fixed | 7 | $186 | Electronics, Engineering | Sep 19, 2008 | - | ||
| ... the internal resistance of the battery. The electronic circuit has to handle batteries ... is to determinate the condition of the battery based on its internal resistance. ... is highly preferred to develop this circuit using a microcontroller (PIC) of ... | Fixed | 14 | $1211 | Electrical Engineering, Electronics, Engineering, Microcontroller | Jan 25, 2010 | - | ||
| Project characteristics: We need a battery charger able to charge two serial ... , 17.2 Ah batteries serial connected. Maximum battery current charge: 1.6A (Is desirable ... : 3A Current charger limit: 6A Short circuit protection per output: 10A Minimum ... | Fixed | 11 | $480 | Electronics, Engineering | Aug 25, 2008 | - | ||
| ... inches of the water. The circuit must be battery powered by a small over the shelf battery,The unit will be operated ... hour everyday. We would like the battery to last atleast one year. ... will be water proof. I just need the circuit designed and prototyped. ... | Fixed | 32 | $497 | Electronics, PCB Layout | Feb 14, 2010 | - | ||
| ... and electronic circuit projects using basic components (resistors, capacitors, transistors, battery, etc). ... electrical engineer to assist in developing project content for the product. The ... new concepts. For example, an early project might be to wire an ... | Fixed | 77 | $358 | Electrical Engineering, Electronics | Oct 21, 2010 | - | ||
| Fixed | Jan 19, 2012 | - | ||||||
| Fixed | Nov 2, 2010 | - | ||||||
| ... are complicated and charge the whole battery pack while balancing individual cells. ... power. Deliverables for this project are circuit designs, a working prototype for ... to winning bidder including specs of battery cells and ideas about implementation. | Fixed | 13 | $1265 | Electrical Engineering, Electronics | Mar 1, 2011 | - | ||
| Simple LED watch circuit powered by a 3v button cell battery (Multiplexing). When activated by user it ... -5 seconds). In short a very standard circuit. This is for a prototype so ... but a key feature is that the circuit can be bend i.e build ... | Fixed | 7 | $129 | Electronics | Nov 8, 2007 | - | ||
| I need a circuit design probably based around a low power op- ... detect 50Hz mains. Requirements: 1. Must be battery operated and give at least 6 ... Hz is still present. 5. Must have a low battery indicator or battery test circuit. A working prototype ... | Fixed | 13 | $208 | Electronics, PCB Layout | Jul 12, 2010 | - | ||
| Fixed | Sep 15, 2010 | - | ||||||
| ... design and prototype for a RF circuit, wireless with one receptor and differenciated ... that may be used in the project. The final product must be capable ... very small space for circuit and battery. The project must comply with the specifications of range and ... | Fixed | 16 | $430 | Electrical Engineering, Electronics, Microcontroller | Oct 23, 2010 | - | ||
| This project is for electronic circuit design and PCB layout. I am ... switch connecting a 12 volt gel cell battery to a 12 volt electric solenoid valve. The circuit must ... configured the same if desired The circuit must have multiple isolated inputs- ... | Fixed | 22 | $24 | Electronics, PCB Layout | Nov 20, 2011 | - | ||
| Design simple 24v control circuit Need to use automotive parts eg bosch relays ... design, layout and workshop drawings The circuit includes solar, battery bank 6 X 200Ah ... ok to use commerciably available solar charge controllers. Circuit needs to be robust | Fixed | 11 | Electrical Engineering | Jan 9, 2012 | - | |||
| ... with component list for the follow project : we have 2 signal : A ... B - 12 V power from battery A,B connected to a ... C switch ( we already have this circuit ) the system will start 2A) ... the dc converter input from battery ask me if something is ... | Fixed | 24 | $90 | Electrical Engineering, Electronics, Engineering, PCB Layout | Jun 8, 2010 | - | ||
| ... of 10-16,5-18V{battery powered}, they have to work ... voltage levels As this is battery powered, voltage varies from 18 ... input signal 8. Board has also battery monitor circuit that measures ... bellow 10V needs to disconnect battery from load, via say relay ... | Fixed | 4 | $373 | Electrical Engineering, Electronics, PCB Layout | Dec 7, 2011 | - | ||
| ... bid accurate and for what the project would cost, don't place ... into the CB directly from the battery,(wire soldered in to board), ... be also powered from the phone/battery backup,the screen Im looking ... the phone and back up battery unit with. Please ask any ... | Fixed | 14 | CAD/CAM, Electrical Engineering, Electronics, PCB Layout, PLC & SCADA | Mar 4, 2012 | - | |||
| ... with a small electronics project. I have a circuit and gerber pcb ... , before it is fabricated The circuit is pretty simple and is ... of time from a aaa battery power source. AS designed it ... are able to check this circuit on a breadboard, or manufacture ... | Fixed | 14 | $146 | Electrical Engineering, Electronics, Microcontroller, PCB Layout | Mar 5, 2012 | - | ||
| I am looking for a schematic design (EAGLE format) and working prototype for charging Lithium Ion/Lithium Poly batteries. The batteries are single cell 3.7v batteries 4.2v fully charged. Safety protection IS A MUST in the design. Must comply with the ... | Fixed | 13 | $165 | Electronics, Engineering | Mar 27, 2009 | - | ||
| Fixed | Oct 12, 2011 | - | ||||||
| PROJECT Develop and submit a working prototype of a RECHARGEABLE BATTERY POWER SOURCE IN CUSTOM CASING BATTERY Type: Li ion with built in circuit protection Max Voltage: 7.4V Capacity: 3000 ... | Fixed | 7 | $1371 | Electronics, Manufacturing, Manufacturing Design | Jan 13, 2012 | - | ||
| Fixed | Dec 5, 2007 | - | ||||||
| ... 1) 3) Same system model with equalizer (Using advanced Zero-forcing Algorithms ... , Rayleigh Fading model, Zero-forcing equalizer, QPSK demodulation whichever is possible ... of equations and calculations) - Why advanced equalizer algorithm has better BER over ... | Fixed | 9 | $671 | Electronics, Matlab & Mathematica, Report Writing, Wireless | Sep 10, 2010 | - | ||
| Fixed | Feb 6, 2012 | - | ||||||
| ... would be to develop an accurate music equalizer that looks EXACTLY like this image ... as configure the size of the overall equalizer. -Programmer (Adobe AIR is probably the ... programmer will need to make the equalizer detect currently played music in iTunes ... | Fixed | 4 | $180 | ActionScript, Animation, Flash, Windows Desktop | Jul 20, 2010 | - | ||
| ... system BER performance with/without MSE Equalizer. Requirement ( Project to do list) ... plot out BER graph without MMSE equalizer 2) Same system model with ... BPSK modulation, Racian Fading model, MMSE equalizer, BPSK demodulation whichever is possible ... | Fixed | 6 | $130 | Electronics, Matlab & Mathematica, Report Writing, Research, Wireless | Sep 9, 2010 | - | ||
| ... a unique Buck converter charging circuit for a mobile charging device with internal battery back up. More details will be shared with the ... signing an NDA (Draft Attached). The nature of the project is going to be confidential. | Fixed | 8 | $224 | Electrical Engineering, Electronics, Microcontroller, PCB Layout | Aug 30, 2011 | - | ||
| ... but explain to me the motor and the battery with the solar power. waiting for your ... /fwdschematics%20%281%29.zip i posted the project requirement over here http://www.freelancer.com/projects/Electronics-Microcontroller/circuit-designing.html | Fixed | 7 | $8 | Electrical Engineering, Electronics, Embedded Software, Microcontroller | Oct 26, 2011 | - | ||
| I need an LED driver with a Li-Ion battery charger integrated onto the same circuit board. LED Driver: Provide power to 4 x 3.0A high power White LED's in series powered by 5 series - wired lithium ion batteries. (Buck ... | Fixed | 10 | $215 | Electrical Engineering, Electronics, Microcontroller, PCB Layout, Product Design | Mar 5, 2012 | - | ||
| ... PCB layout already done by your company. If the project can be completed tonight I will be very ... the Op amp pin out Made a low battery circuit, as seen on the bottom left of the schematic. Made a battery connection circuit with a diode Changed the value of ... | Fixed | 1 | $20 | PCB Layout | Mar 13, 2012 | - | ||
| ... 6 inch by 1 inch wide printed circuit board inside with about .25" clearance ... accommodate 0.23"x1.16"x2.0" battery inside (like: http://www.sparkfun.com/products/341) -Must have room to connect the battery to circuit board via cable -Must accommodate ... | Fixed | 10 | $134 | 3D Rendering, Mechanical Engineering, Solidworks | Mar 28, 2012 | - | ||
| This project is a simple TI embedded Beagle Bone hardware and software design project. Develope the system requirements for a poly LI-ION battery power cape. Do the circuit design for the cape. Do the PCB design for the cape. Do the Eclipse C row boat ... | Fixed | 2 | $625 | C Programming, Electronics, Embedded Software, PCB Layout | Today | 6d 21h | ||
| ... for someone to make an equalizer display application that runs on ... on/as the background. The equalizer display must be able to ... adjusting the size of the equalizer bars). I also want to ... . I have attached a small equalizer example. You may use the ... | Fixed | 1 | $200 | ActionScript, Animation, Flash, User Interface / IA, Windows Desktop | Jul 19, 2010 | - | ||
| ... for someone who can make a 4x4 matrix keypad circuit ,with very low power consumption,on battery 3,7 v, that it has an eeprom and ... ,pcb,and the software.It is preferable that the project will be made with microchip pic and ccs compiler. ... | Fixed | 19 | $1814 | C Programming, C# Programming, C++ Programming, Delphi, Engineering | Sep 10, 2011 | - | ||
| ... Unit with. The engineer would design the circuit and provide a professionally made digital schematic drawing of the circuit along with all the electronics components ... /names/indexes. We will assemble the circuit at our location. The engineer does ... | Fixed | 22 | $390 | Electrical Engineering, Electronics, Engineering | Jan 18, 2012 | - | ||
| ... difficult on the .1mm level. It incorporates a simple rugged battery tube, a 17 point design checklist (safety specifications, mostly ... will be asked to take your design to the final schematic level with all solidworks, g-code, and mold specifications ... | Fixed | 4 | $910 | Industrial Design | May 10, 2012 | 2d 17h | ||
| ... a Tsop40 flash, a 6264 PDIP, a CR2032 Battery, 74ls139 Addressdecoder, custom 16pin Chip easy ... for voltage. I have designed a roughly schematic in Eagle and can provide you ... have to fill in the sram battery backup circuit, fill in the voltagelines and ... | Fixed | 11 | $128 | PCB Layout | Jan 9, 2010 | - | ||
| ... like someone to design a fully functioning music equalizer display that can run on a user's desktop. The equalizer MUST look like the attached photo The ... necessary. My main concern is that the equalizer looks like the photo and that it ... | Fixed | 1 | $200 | ActionScript, Flash, PHP, Software Architecture | Jul 20, 2010 | - | ||
| ... system BER performance with/without MSE Equalizer. Requirement ( Project to do list) ... plot out BER graph without MMSE equalizer 2) Same system model with ... BPSK modulation, Racian Fading model, MMSE equalizer, BPSK demodulation whichever is possible ... | Fixed | 4 | $133 | Electronics, Matlab & Mathematica, Report Writing, Research, Wireless | Jan 14, 2012 | - | ||
| ... (and possibly provide prototype) of a circuit to detect low water level and ... is intrinsically safe against electrocuting swimmers. Circuit would include an overfill lockout that ... sensed for more than 20 minutes. Circuit should include LEDs to inform user ... | Fixed | 23 | $197 | Electrical Engineering, Electronics, PCB Layout | Apr 17, 2012 | - |
Showing 1 to 50 of 1823 entries
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