Battery balance circuit jobs:
| Project Name | Description | Type | Bids | Avg (USD) | Skill Required | Started | Ends | |
|---|---|---|---|---|---|---|---|---|
| ... 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 | - | ||
| The project consist on a circuit with all funcionatilties needed to perform ... and NICd batteries packs charge. The battery packs will contain a number of ... voltage and 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 ... Alarm light • Transmitter • Receiver The circuit should perform as follows. When the ... I refer to as activation light. The circuit and receiver should be design for ... | 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 | - | ||
| ... module able to balance 2 to 4 batteries. Batteries will be either lithium (2V ... to indicate what the system is doing- balancing, balanced, error. -Circuit should go into low ... so this circuit must not drain the batteries when idle. You must select the ... | Fixed | 12 | $525 | Electronics, Engineering | Jul 14, 2009 | - | ||
| ... module able to balance from 2 to 5 batteries connected in series. Batteries will be either lithium (2V min to 4V max) or ... enter a low power mode once batteries are all within 10mv of ... for the micro controller are the batteries it is connected to, and ... | Fixed | 8 | $181 | Electronics | Aug 5, 2009 | - | ||
| 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 | - | |||
| ... solutions in the market that charge and balance a 12 cell pack are complicated and charge the whole battery pack while balancing individual cells. We ... power. Deliverables for this project are circuit designs, a working prototype for testing ... | Fixed | 13 | $1265 | Electrical Engineering, Electronics | Mar 1, 2011 | - | ||
| ... volt UPS, without any fancy "on battery" or "supply fail" ... other than a couple of LED indicators. The battery circuit must disconnect the battery ... and cheap device. Deliverables are: 1. Circuit design 2. Gerber, solder resist, ... | 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 | - | ||
| ... adaptor is connected, providing 19,5V, batteries are disconnected from outer system Batteries ... power are present, no connection between batteries and outer system is made. When there is no external supply, batteries are automatically connected to the ... | Fixed | 4 | $373 | Electrical Engineering, Electronics, PCB Layout | Dec 7, 2011 | - | ||
| ... 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 ... when battery needs changing - type of battery will be determined by engineer • CPU â ... | 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 | - | ||
| ... able to charge two serial connected batteries of 18 Ah. The circuit must ... first one is to charge the batteries and the other is on absence ... 24 VCD • 13.2 VCD Batteries: Two 12 VCD, 17.2 ... user can choose how fast the batteries should be charge, Fast 1. ... | 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 | - | ||
| ... simple electrical and electronic circuit projects using basic components (resistors, capacitors, transistors, battery, etc). All components are already provided to ... The user could then plug in the battery, hold down the switch, and watch the ... | Fixed | 77 | $358 | Electrical Engineering, Electronics | Oct 21, 2010 | - | ||
| Fixed | Jan 19, 2012 | - | ||||||
| Fixed | Nov 2, 2010 | - | ||||||
| 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 | - | ||||||
| ... electronic design and prototype for a RF circuit, wireless with one receptor and differenciated transmissors. The circuit will work at very small distance of 12 ... ensambled in very small space for circuit and battery. The project must comply with ... | 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 | - | |||
| ... from a switch B - 12 V power from battery A,B connected to a DC converter ... pushing a C switch ( we already have this circuit ) the system will start 2A) if the ... will power off the dc converter input from battery ask me if something is not clear ... | Fixed | 24 | $90 | Electrical Engineering, Electronics, Engineering, PCB Layout | Jun 8, 2010 | - | ||
| ... charge a cellular phone,through a 30 pin connector positioned in the center of the PCB,the power will be ... will provide output through the 30 pin connector to a external led/amoled ... .I will also need a 30pin connector below the first one to recharge ... | Fixed | 14 | CAD/CAM, Electrical Engineering, Electronics, PCB Layout, PLC & SCADA | Mar 4, 2012 | - | |||
| ... small electronics project. I have a circuit and gerber pcb design but ... , 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 | - | ||
| ... 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 following: -rohs compliant ... | Fixed | 13 | $165 | Electronics, Engineering | Mar 27, 2009 | - | ||
| Fixed | Feb 22, 2012 | - | ||||||
| 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 mAh at ... | Fixed | 7 | $1371 | Electronics, Manufacturing, Manufacturing Design | Jan 13, 2012 | - | ||
| Fixed | Dec 5, 2007 | - | ||||||
| Fixed | Feb 6, 2012 | - | ||||||
| We want to develop a unique Buck converter charging circuit for a mobile charging device with internal battery back up. More details will be shared with the Freelancer after signing an NDA (Draft Attached). The ... | Fixed | 8 | $224 | Electrical Engineering, Electronics, Microcontroller, PCB Layout | Aug 30, 2011 | - | ||
| ... the flow chart but explain to me the motor and the battery with the solar power. waiting for your reply please send ... 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 | - | ||
| ... M for both. Fixed 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 C25 and C26 Changed the Micro USB to Mini ... | 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 ke | Fixed | 2 | $625 | C Programming, Electronics, Embedded Software, PCB Layout | Today | 6d 21h | ||
| hi,i´m looking 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 i2c real time clock for the timestamp.The keypad entries should ... | 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 | - | ||
| ... on the .1mm level. It incorporates a simple rugged battery tube, a 17 point design checklist (safety specifications, ... and logical), a controller assembly, and piggy back circuit-board housing... Basic drawings, specifications, and details will all ... | Fixed | 4 | $910 | Industrial Design | May 10, 2012 | 2d 17h | ||
| ... containes a Tsop40 flash, a 6264 PDIP, a CR2032 Battery, 74ls139 Addressdecoder, custom 16pin Chip easy wired to 4 ... you will have to fill in the sram battery backup circuit, fill in the voltagelines and organise the addresslines in nice busses. After ... | Fixed | 11 | $128 | PCB Layout | Jan 9, 2010 | - | ||
| ... (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 | - | ||
| I need help in miniaturizing a circuit schematic that I have (involves a microcontroller ... pill with half dedicated to a miniature circuit (with a microcontroller) and the other ... advice on how to take my existing circuit diagram and find components and create ... | Fixed | 8 | $635 | Electrical Engineering, Engineering, Microcontroller, PCB Layout | Apr 28, 2012 | - | ||
| Summary: Manually enter electrical schematics into schematic capture tool Get an account on www. ... symbol for a person, use a 2 pin header in it's place. 9. ... the lack of disconcerted nets and random pin placements done by eagle. -- For some examples ... | Fixed | 14 | $106 | CAD/CAM, Data Entry, Electrical Engineering, Electronics, Microcontroller | Sep 23, 2011 | - | ||
| ... comes the door will close. the food should be in a serten level. also the water. all of that will be working by a rechargable battery, which it will be charged by a solar. what you think? As per i think there is 2 issue so you can keep 2 ... | Fixed | 16 | $245 | Electronics, Embedded Software, Microcontroller, PCB Layout, Software Architecture | Oct 12, 2011 | - | ||
| Fixed | Dec 7, 2007 | - | ||||||
| ... ). 4 of this outputs are used to control a copule of CD4051 (switch), wich select the voltage to read. This voltage is from a battery, I need to read the voltage via AD converter. This voltage must be read in the web server too. I need the project with ... | Fixed | 11 | $198 | C Programming, Electronics, Microcontroller, Remote Sensing | Jan 23, 2012 | - |
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