65 Threads found on edaboard.com: Dual Battery
I need to design a power supply powered by 9V cell battery to provide a +/- 6.5V dual polarity power supply with max. load curent of about 1A each rail.
Is it possible to apply a National buck regulator IC to implement this? If so, how to implement?
Or could you suggest me a schmetic for this with selection of passive components in detail?
Analog Circuit Design :: 29.02.2004 00:40 :: rozerf :: Replies: 0 :: Views: 1849
Well i guess you mean how to use the op-amps which need dual power supply ,well for this case there is some ct. which makes dc-dc converstion so some ct take the 9v and converts it to +4V , -4V and GND ofcourse
Electronic Elementary Questions :: 03.08.2004 10:39 :: ahmed osama :: Replies: 3 :: Views: 1604
Hope you dont mind me giving my two cents. I once developed a charger to charge a 12V sealed lead acid battery, I will first briefly explain what I've done and let you filter if there is any chance where I can provide useful information to you.
Mine is a PIC based dual powered, switch mode charger unit. I've developed a boost conve
Microcontrollers :: 17.08.2005 18:26 :: devonsc :: Replies: 3 :: Views: 4045
I have browse through several battery charger IC with dual input (AC & USB) from Maxim and TI. I'm wondering on how to know whether the IC can provide faster charging time compared to others. Ussually, handphone charger are fast charger, what charger IC they ussually use...?
Analog Circuit Design :: 22.09.2006 00:31 :: contagiouseddie :: Replies: 1 :: Views: 862
Yes, three individual parts or they have duals or triple outputs available from National or Linear.
The TPS61032PWP is probably too large a part (2A) that can boost from 3V to 5V.
This requires min amount of parts.
Electronic Elementary Questions :: 17.10.2006 15:23 :: wall0p :: Replies: 11 :: Views: 2508
I'd like to use 2 11.2 lipo batteries in parallel, and therefore need them both to be regulated down to about 6v. Anyone know of a circuit whereby I can use 2x11.2 v packs together (without explicitly wiring them in parallel first?) It would be ideal that there be a concept of a pack1 and pack2 (kind of like a mini-ups) and a failover if the volt
Hobby Circuits and Small Projects Problems :: 12.03.2007 00:17 :: coloradoz :: Replies: 1 :: Views: 1077
Im in the process of making a set of arc hid-li-ion mountian bike lights, because i just cant justify spending $700 on them. You can buy a li-ion battery pack for lights, but that alone is $300, so i figure, a laptop battery will be my cheapest bet. I have a set of homemade dual beam 15wX2 halogens with a nicad battery with (...)
Electronic Elementary Questions :: 02.05.2007 23:40 :: drew00629 :: Replies: 1 :: Views: 936
You missed the one I use, a Fujitsu. It's an excellent laptop with a dual battery bay.
Microcontrollers :: 04.07.2007 23:50 :: blueroomelectronics :: Replies: 1 :: Views: 526
How much current do you require at +5 and -5v?
Added after 1 minutes:
i came across this dual voltage regulator circuit using LM317 & LM337, can anyone help me see what is the input range like?
Electronic Elementary Questions :: 02.06.2008 04:11 :: NicholasTok :: Replies: 6 :: Views: 2958
Just want to know if my design for dual power switching between an AC-DC adapter and batteries as shown below is correct. My intention is to allow the system to draw power from the AC-DC adapter instead of batteries when AC-DC adapter power is available.
Appreciate if there is any feedback on this circuit.
Analog Circuit Design :: 04.09.2008 02:13 :: ericmar :: Replies: 3 :: Views: 809
I need a circuit design for battery charger getting two different input source i.e Solar panel and Wind mil.
Power Electronics :: 05.08.2009 03:16 :: immikhan25 :: Replies: 1 :: Views: 883
I have a GM862-GPS and also Li-Ion battery. I want to make a circuit which uses both external power supply, L5973 was used for that purpose, and battery. As i saw, there is a "charge" pin related to this job, i downloıaded the application note related with battery charging from but it came me not so obcvious. Maybe, if some
Microcontrollers :: 24.10.2009 06:36 :: jedi_erdi :: Replies: 4 :: Views: 3452
how to get dual voltages (12v, 0v, -12v) from a single 12V battery ??
Electronic Elementary Questions :: 19.02.2010 03:37 :: hameeds01 :: Replies: 6 :: Views: 3439
If you want to charger a dual-cell battery with 5V USB, I think you have to have a Boost circuit.
Analog Circuit Design :: 06.01.2011 06:40 :: leo_o2 :: Replies: 6 :: Views: 1234
I need dual output Dc-Dc converter.
Input Voltage--->+6V (from battery)
Output1-------->+12V @ 50mA
Output2-------->-12V @ 50mA
Can somebody suggest me with the part number or readily available module.
Thanks and Regards,
Power Electronics :: 06.09.2011 01:50 :: yviswanathbe :: Replies: 8 :: Views: 1199
Tonight I started looking into electronics as I want to do engineering at uni and thought it would be sensible to get some basic knowledge.
I found a beginner project to start on, the "atari punk console".
I'm using this schematics understand
Electronic Elementary Questions :: 12.01.2012 13:02 :: Turnitdown :: Replies: 4 :: Views: 328
Does L293 need dual power supply ?
I tried to rotate the wheel with load, but can not rotate,
It's rotating if there's no load ( not sticking to ground ), but not rotate if I put it on the ground.
Is it because of the power supply ? or my battery is not strong enough ? I'm using 12V 1.3Ah
Microcontrollers :: 26.05.2012 11:32 :: bianchi77 :: Replies: 7 :: Views: 294
I propose you use a dual battery operated measurement device with 200dB CMRR when you are using high impedance signal sources and high impedance loads (OA) you can use large divider ratio ( 10~30:1) then amplify with a single resistor to choose any gain you want 1~1000.
Because E-field from AC mains will be high; and ESD events
Analog Circuit Design :: 22.07.2012 16:03 :: SunnySkyguy :: Replies: 9 :: Views: 511
I am going to buy 4 motors which are having following specifications :
Outrunner Brushless DC Motor
dual sealed ball bearings
KV: 1500 RPM/V
Thrust: 1200gms max.
Voltage: 7V to 16.8V
Current: 18Amp continuous, 20Amp max.
& related motor controller has following specs.
? Output: 20A continuous
Microcontrollers :: 01.09.2012 02:45 :: Jigar 4 Electronics :: Replies: 7 :: Views: 421
OP290 is a high performance micropower dual op amp that operates from a single supply of +1.6V to +36V
Power Electronics :: 31.10.2012 08:18 :: picgak :: Replies: 2 :: Views: 354
I am building a battery switch using low side topology, see schematic below. MCU has control lines at logic levels, one to drive Q2 to allow load , the other to drive Q1 to allow charge. If I use logic level gate type Q2 MOSFET, I can drive it directly via MCU line. But I can't figure out how to drive Q1 since its in reverse polarity in r
Power Electronics :: 01.11.2012 08:19 :: electric1 :: Replies: 7 :: Views: 477
I need to design a power supply powered by a 9V cell battery to provide a dual polarity (one positive output and one negative with same magnitude of the positive's) power supply (say +/- 5V) with max. load curent of about 1A each rail.
Could anyone suggest a schmetic for this ?
Professional Hardware and Electronics Design :: 29.02.2004 19:23 :: rozerf :: Replies: 7 :: Views: 2434
There are some relays that are dual-functions. Thay have a normally open, a normally closed and a common contact.
Look for SPDT relays.
Electronic Elementary Questions :: 24.08.2004 20:29 :: Big Boy :: Replies: 7 :: Views: 1440
Is the LM311 driven by dual power supplies or single power supply?
What's the value (minimum) of V2? Is V2 stable enough? Pls do aware that the input of LM311 is NOT R-R.
'1V' does look like 'noise'. Anyway, you may try to confirm whether it's due to noise or not. If it's, you probably need to add 'hysteresis' loop (positiv
Professional Hardware and Electronics Design :: 06.11.2004 22:09 :: nicleo :: Replies: 1 :: Views: 1422
Could somebody help me? The problem is: I need to feed a circuit with some values of supply: 5V, 3.3V, 3.8V and 1.8V. Some ICs need 3.3V, only one IC needs 1.8V, another one needs 5V and another needs 3.8V.
Then, I have two sources of power: a +12VDC which comes from a solar cell and another one which comes from a +3.7V battery. I
Analog Circuit Design :: 28.07.2005 10:20 :: muixego :: Replies: 3 :: Views: 1392
Thank Kasd, but these LCD aren't suitable
to battery powered, the current comsumption
should be less than 50uA
I was reading hitachi 44780 datasheet and it
current consumption is to much to develope
a low-power LCD module, there is a LCD module
with another controller to use in a very low powerd
Hi, why no
Microcontrollers :: 27.09.2005 05:10 :: pirev :: Replies: 8 :: Views: 1788
q1 and q2 work as a current mirror with the diode
and the diode is a dual action
1} to make a bias to turn q1 and q2 on while the supply volts from the psu is .6 v higher than the cell
assume the cell is lead acid it will need a constant voltage and will source its own charge current unlike nicad that requires a constant current to char
Analog Circuit Design :: 29.09.2005 07:27 :: VSMVDD :: Replies: 1 :: Views: 826
Hmm.... Not sure about the following, but lets give it a try :)
I think the concept of virtual ground here is just like the ground of the whole circuit other than the battery's negative terminal. If you want to use a voltage source you have two approaches:
1. You can use dual supplies Vdd/2 and -Vdd/2 with the ground as the VGND
2. Do the circ
Electronic Elementary Questions :: 28.02.2006 15:59 :: elmolla :: Replies: 5 :: Views: 813
I have this radio clock and I don't know why each time the current went off loses the time. Any sugestion?
This model doesn't have any battery for backup
Some sony model have a dual layer capacitor but I don't see any
Added after 43 seconds:
the picture of the clock
Service Manuals, Requests, Repair Tips :: 28.06.2006 11:02 :: angelmoure :: Replies: 6 :: Views: 3533
any body help me
i want dual supply in my car (12v+,Gnd,12v-)
how to make negitve 12 volt in car
kindly help me
Hobby Circuits and Small Projects Problems :: 11.12.2006 15:31 :: qayyoum :: Replies: 7 :: Views: 1379
You don't mention whether you are using a single supply or not. If you are using dual supplies (+ and - supplies) you do not need the capacitors. However, if you are using a single supply, then when the AC input goes negative, the Op Amp substrate diode gets forward biased, and the op-amp will not function. The voltage divider on the
Electronic Elementary Questions :: 13.12.2006 11:16 :: Kral :: Replies: 4 :: Views: 2852
>>741 Opamp is not accurate enough for this operation.
What do you mean by NOT ACCURATE ENOUGH? It has a GBW of around 1 MHz and that should be enough be Audio signals.
>> I tried to use a non-inverting amplifier using 741 Opamp and a 9V battery to amplify and DC shift the signal, I designed the circuit and connected the output signal to an o
Digital Signal Processing :: 10.02.2007 23:20 :: zeeshanzia84 :: Replies: 1 :: Views: 723
What if you use a DC-DC converter and match 30V as an output? I guess then there will be no problem with your charger - maybe you should iplement some extra protection. An you will end up with a dual output device!
Hobby Circuits and Small Projects Problems :: 28.03.2007 06:56 :: dkace :: Replies: 9 :: Views: 1848
The C8051F9xx is the industry?s first MCU family capable of full-spec operation down to 0.9 V and up to 3.6 V, enabling single-cell battery operation as well as dramatically increasing battery life for dual-cell applications.
Microcontrollers :: 04.03.2008 10:44 :: PaulHolland :: Replies: 0 :: Views: 415
I have a schematic diagram here showing how to build a dual voltage supply of + and - 5V using LM317 & LM337, just to ask, what is the minimum and maximum range input voltage for this 2 IC chips?
i will be using a 9V battery, is it possible? and i would need to know the minimum input voltage in order to guage the performance
Hobby Circuits and Small Projects Problems :: 02.06.2008 10:37 :: NicholasTok :: Replies: 2 :: Views: 2031
I'm designing a distortion pedal. In the schematic there's a dual opamp labelled 4557D. However, I can't find information on this device on the web. Does anyone know the complete name of this device or a possible replacement?
Thanx in advance for the help
Hobby Circuits and Small Projects Problems :: 16.06.2008 13:41 :: Ghost Tweaker :: Replies: 1 :: Views: 2497
? dual wave length stable laser source
? Memory capacity of 50 records
? High contrast backlit display
? Auto power off after 6 minutes idle
? Compact & simple
? Optical loss precise test
? Auto wavelength identification
? Absolute power test (dBm)
? Working wavelengths: 1310nm, 1550nm
Business, Promotions, Advertising :: 23.10.2008 04:10 :: gaotekinc2008 :: Replies: 0 :: Views: 654
I'm using a eval board dual frequency PLL from analog device (ADF4252EB2). I populated the eval board with my loop filters and vco's. I need help figuring out where on the eval board do I connect my positive terminal and negative terminal of my power supplies to supply power to vco1 and vco2? I provided the eval board dat sheet, circuit diagram is
RF, Microwave, Antennas and Optics :: 15.11.2008 10:08 :: robismyname :: Replies: 3 :: Views: 560
I'm looking for one H-Bridge to move one motor with 60W of power and 18V.
The solution will be compact and efficient.
Use 4 MOSFETS is one posibility, but the solution is not compact. Someone knows one dual Mosfet (N-and P-Channel) ?
Also the RDSon are very important (efficiecy) because the power supply is the battery.
Analog Circuit Design :: 16.11.2008 15:32 :: kkdelabaca :: Replies: 0 :: Views: 749
Hi i was trying to make a simple water level indicator.The circuit is shown below
R1,R2,R10-R12___15K 1/4W Resistors
R3,R4____________1K 1/4W Resistors
R5_____________100R 1/4W Resistor
R6______________47K 1/4W Resistor
R7,R8,R13________3K3 1/4W Resistors
Analog Circuit Design :: 09.04.2009 02:24 :: themaccabee :: Replies: 0 :: Views: 726
I am looking for a voltage booster circuit that will give me a constant Vout of +12V and -12V when Vin ranges from 10.8v to 13.8v. I thought I found what i wanted from farnell. The technical specs of this module can be found in the PDF of the URL. What I got is a dual model.
But ... w
Analog Circuit Design :: 03.07.2009 10:45 :: garfy :: Replies: 0 :: Views: 592
Hello, I am currently working on a small project that will use a dual one-shot IC (something like HCF4548B) and will be powered off a 12V automobile battery. I am not sure how I should power/connect the IC. Let me explain a little more about the project:
The HCF4548B has an absolute maximum rating for Vdd of up to 20V (I think), and it's trigger
Analog Circuit Design :: 16.10.2009 03:08 :: UnSaniT :: Replies: 0 :: Views: 461
Operational Amplifier Circuit Fabrication
An operational amplifier, or "op-amp" for short, is an integrated circuit which is capable of amplifying an AC signal without introducing distortion into the signal. The amplification factor, or "gain," in an op-amp circuit can be set by using two resistors connected to the op-amp input leads.
Analog Circuit Design :: 21.07.2011 05:02 :: obella1023 :: Replies: 0 :: Views: 480
I'm building a dual axis sun tracker. My solar panels are rated 10W. The solar panels is going to charge a 12V lead acid battery.
I tried the circuit below but didn't manage to get any good result.
Now, I 'm thinking of just using the 10mm Greed LED as photodiode and connect 4 of them(for dual axis), with 90deg between them, directly (...)
Microcontrollers :: 24.03.2010 21:53 :: LOLsim :: Replies: 3 :: Views: 1853
my circuit consists of an opamp amplifier stage and an adc with uc stage
i am planning to use a 9v battery and use a virtual ground created at +4.5v for the dual supply of opamp
the gnd of 9v source will be the same for adc which is supplied with 5v from 7805 having the 9v battery as its input.
therefore the signal from (...)
Microcontrollers :: 27.03.2010 07:02 :: tux21 :: Replies: 3 :: Views: 724
Your differential amplifier needs a dual-polarity supply. Because the 3rd opamp will have a negative output voltage if one input is positive. It cannot have a negative output without having a negative supply. So the output is saturated at 0V in your circuit.
Or you could bias one input at half the supply voltage (+4.5V) then when the other input
Electronic Elementary Questions :: 29.03.2010 14:19 :: Audioguru :: Replies: 1 :: Views: 1265
I need a miniature dual triode type tube like the size of ECC83, but one which uses low filament current. 300mA is too high. the lowest the better.
Do you know of any types?
Tubes and Retro :: 22.07.2010 09:30 :: neazoi :: Replies: 7 :: Views: 3300
Hi guys i have a problem and i need to find a solution .I'm designing a low power supply for a SPARTAN 6 board .There is a TI chip that could be a perfect match with the exception that the min output voltage is 1.2 V spartan 6 uses 1 volt.
The topology of the chip .which is a TPS75003 a dual buck converter .You know a classical coil with
Analog Circuit Design :: 22.08.2010 17:28 :: eltonjohn :: Replies: 2 :: Views: 528
You can use dual op amp OPA2674 instead. Push-pull configuration will give you up to 1W output power.
Analog Circuit Design :: 21.09.2010 04:46 :: Borber :: Replies: 17 :: Views: 1831
I am starting to work on a pulsed power supply using SCR's as controlled rectifiers. Basically, my first intention is a to use a simple design: power transformer with dual secondary, 2 SCR's, filtering output choke and 24 VDC battery bank. A good old TCA785 will drive the SCR's.
Over current protection will be performed using a LEM s
Power Electronics :: 07.10.2010 10:11 :: andrelux :: Replies: 4 :: Views: 1358