Battery circuit project jobs:
| Project Name | Description | Type | Bids | Avg (USD) | Skill Required | Started | Ends | |
|---|---|---|---|---|---|---|---|---|
| ... 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 | - | |||
| ... 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 | - | ||
| Looking for andrew123 who recently replied to my circuit project assignment Please PM me! | Fixed | 3 | $30 | Electronics, Engineering | Nov 13, 2007 | - | ||
| ... 12 Volt 7 AH seal lead acid battery. Contained is a microprocessor and the 12 ... three main functional components to this project: Battery Switch over: 1) The primary power ... source is in use (TTL level) Battery Charger: A boost converter maybe needed ... | Fixed | 7 | Electronics, Engineering | Nov 13, 2008 | - | |||
| 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. ... a wide voltage range (2V-16V per battery). The maximum amount of current that must ... Also if you decide to make the balancer using a microcontroler instead of entirely from ... | Fixed | 8 | $181 | Electronics | Aug 5, 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 | - | ||
| Project characteristics: We need a battery charger able to charge two serial ... output voltages must be provided by the battery. The transition between AC power and ... .2 Ah batteries serial connected. Maximum battery current charge: 1.6A (Is desirable ... | Fixed | 11 | $480 | Electronics, Engineering | Aug 25, 2008 | - | ||
| ... 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 | - | ||
| This development requires getting the battery condition of a lead-acid and ... of measuring the internal resistance of the battery. The electronic circuit has to handle ... is to determinate the condition of the battery based on its internal resistance. ... | Fixed | 14 | $1211 | Electrical Engineering, Electronics, Engineering, Microcontroller | Jan 25, 2010 | - | ||
| ... 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. If ... Voltage Fault Red - High Voltage Fault Battery voltages range from 1V to 20V ... | 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. If ... Low Voltage Fault Red - High Voltage Fault Battery voltages range from 1V to 20V ... | Fixed | 7 | $661 | Electronics, Engineering | Jul 11, 2009 | - | ||
| ... a very small piezo transducer. The circuit will be powered by a ... timing. I'm using Livewire (Circuit design) to change the design ... would be ideal if the circuit used a cmos LMC555 (or ... 3v battery and very small piezo transducer. I need the circuit ... | Fixed | 22 | $117 | Electronics, Mechatronics, Microcontroller, PCB Layout | Dec 3, 2009 | - | ||
| ... a few inches of the water. The circuit must be battery powered by a small over the shelf battery,The unit will be operated a for about one hour everyday. We would like the battery to last atleast one year. The temperature range is ... | 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 | - | ||||||
| ... 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 | - | |||
| ... pack are complicated and charge the whole battery pack while balancing individual cells. We ... that is dedicated to our particular battery pack and actually charges each cell ... to winning bidder including specs of battery cells and ideas about implementation. | Fixed | 13 | $1265 | Electrical Engineering, Electronics | Mar 1, 2011 | - | ||
| Fixed | Sep 15, 2010 | - | ||||||
| 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 | - | ||
| ... 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 | - | ||
| 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 | - | ||
| ... 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 | - | ||
| 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 | - | |||
| ... 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 | - | |||
| Fixed | Dec 5, 2007 | - | ||||||
| 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 | - | ||
| 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 | - | ||
| Fixed | Oct 12, 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 | - | ||
| ... 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 | - | ||
| ... 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 | ||
| 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 | ||
| ... 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 | - | ||
| Fixed | Feb 6, 2012 | - | ||||||
| ... 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 | - | ||
| Ultrasonic Sound Activity Monitor Detection Circuit The input circuit consists of an ... comparator to adjust sensitivity. Count Logger circuit Ideally the logging interval should be ... • User-replaceable battery • Delayed ... | Fixed | 1 | $200 | Electronics, Engineering, Microcontroller | Dec 12, 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 | - | ||
| I need help in miniaturizing a circuit schematic that I have (involves ... half dedicated to a miniature circuit (with a microcontroller) and the ... I will pay as the project moves along. In other words ... me finish phases of the project, I will continually pay you ... | 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 ... .png 3. Minty Boost A usb battery extender you can use to extend ... adjustable power supply ideal for breadboarding. Schematic : http://www.ladyada.net/make/ ... | Fixed | 14 | $106 | CAD/CAM, Data Entry, Electrical Engineering, Electronics, Microcontroller | Sep 23, 2011 | - | ||
| For this project I want you to do the following two points: ... you to add filter in the circuit. e.g. since we want to ... it will remove the white or circuit noise which is generally of high frequency. 2. To make the system battery operated so that is can be ... | Fixed | 1 | $1000 | Electrical Engineering, Electronics | Dec 23, 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 | - | ||
| Ultrasonic Sound Activity Monitor Detection circuit consisting of an ultrasonic microphone fed ... of 6 to12 months; User-replaceable battery; Delayed start option; Led count ... programming software This is a full project including a full working prototype and ... | Fixed | 1 | $1600 | Electronics, Embedded Software, Microcontroller, PCB Layout, Wireless | Dec 17, 2011 | - | ||
| ... (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 | - | ||
| ... 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 | - | ||||||
| ... 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 PIC or Rabbit RCM4000, the schematic and the source code ... | Fixed | 11 | $198 | C Programming, Electronics, Microcontroller, Remote Sensing | Jan 23, 2012 | - | ||
| ... 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 PIC or Rabbit RCM4000, the schematic and the source code ... | Fixed | 10 | $420 | C Programming, Electrical Engineering, Electronics, Microcontroller, Remote Sensing | Jan 28, 2012 | - | ||
| Fixed | Jan 30, 2008 | - |
Showing 1 to 50 of 452957 entries
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