1000 Threads found on edaboard.com: 12v 5a Power Supply Circuit
I need a power supply circuit diagram for the data as follows:
Temp: less than 65 * C
Analog Circuit Design :: 10-18-2011 07:13 :: Mithun_K_Das :: Replies: 1 :: Views: 774
anyone have atx power supply circuit with 12v supply? Please help me on this..
Thanks in advace...
Hobby Circuits and Small Projects Problems :: 03-04-2008 03:04 :: aghielan :: Replies: 9 :: Views: 3782
Hi, i need a power supply circuit. I will use it for;
1- Obtain 5V 1A for microcontroller circuit
2- Obtain 12v 1A for backlight
3- Obtain 24-29V 5A for drive dc motors
4- Obtain 100mA constant charge circuit for charge 24V battery
My circuit must work with AC (...)
Analog Circuit Design :: 01-17-2013 13:24 :: otuzsubat :: Replies: 1 :: Views: 184
I am using a 12v/5A Full Wave transformer to step down 230V to 12v using diodes. After the rectification I'm getting 17V DC.
Then it is connected to an external circuit. Right now, if I mix up positive and negative power cables, there is no protection in the external circuit. So, I thought of using a (...)
Power Electronics :: 02-21-2014 22:43 :: Dhanushka Jayaweera :: Replies: 2 :: Views: 578
Look! You have 12vDC? Right?
Decide what frequency you want?
Get AC frequency which is important for your AC signal. Then for amplitude is not a problem at all. You can use opamps, transistors again to change amplitude.
Electronic Elementary Questions :: 10-06-2004 02:01 :: djalli :: Replies: 4 :: Views: 1578
I do need one Simple DC power supply circuit . DC power supply have input voltage:220VAC?10% /50HZ and the output voltage is 5VDC and current ouput ≥450ma.
Please help me to make that circuit without using transformer.
Electronic Elementary Questions :: 09-03-2007 00:58 :: hbaocr :: Replies: 1 :: Views: 783
If the power supply can deliver > 3 x 1.5A - connect all three loads to the +12v / 0V ..
To prevent any one load to cause the others from being shut down in case of a problem consider 2-3A slow-blow fuse for each load ..
Electronic Elementary Questions :: 11-26-2010 00:53 :: IanP :: Replies: 3 :: Views: 732
i designed a 12v dc power supply from a 12v battery of 45Ah. i used it to power devices each of 11v dc and cummulative current of 4A. am using the battery for the loads 24 hours and also charging it 24 hours steadily. i provided a heat sink for the regulators but they are still heating up. is it that the (...)
Analog Circuit Design :: 12-09-2010 05:12 :: pranam77 :: Replies: 11 :: Views: 823
How to build a 0-50V voltage and 0-3A current controlling DC power supply circuit?
Analog Circuit Design :: 05-18-2011 06:28 :: wolf12 :: Replies: 13 :: Views: 2760
The 12v starter can be very low ratings as bias current is 3mA.
However , the load current can be 50mA or so which is at output pins and needs to be catered from the supply for the duration of Vhigh .
Professional Hardware and Electronics Design :: 10-10-2011 00:01 :: vimalkhanna :: Replies: 4 :: Views: 1041
hello sir, i am doing engg. i want basics concept to design unregulated power supply circuit i know the component i need but when i draw schematics digram i have no idea. how to calculate ,what formula i need?
how can i chose rating of component
transformer- power (...)
Microcontrollers :: 11-29-2011 11:05 :: vead :: Replies: 1 :: Views: 288
I can found and understand simple power supply circuit whose input is 230Vac and output is 5Vdc.
But, I cannot understand how to select the passive components of the circuit? Does anyone publish the design calculations for the power supply circuit?
Power Electronics :: 12-21-2011 03:57 :: Baranidaran :: Replies: 4 :: Views: 7302
I have to make 12v ~ 10A power supply, but I have no idea how to do that.
Any idea are welcome.
Hobby Circuits and Small Projects Problems :: 01-24-2003 09:30 :: engraxate :: Replies: 8 :: Views: 8362
I need a schematic drawing for build a 15V 5A power supply because the one of my Toshiba notebook burn.
Can someone help me?
Hobby Circuits and Small Projects Problems :: 10-29-2005 14:31 :: Joaquim :: Replies: 10 :: Views: 1527
Can anyone tell me wich chip should I use for isolated 220v to 12v switching power supply. (20-40w autput power)
Analog Circuit Design :: 12-30-2007 04:11 :: tomikan :: Replies: 2 :: Views: 1611
Anyone do have positive and negative power supply circuit for 0-30v with corse, fine and also current adjustment? Please help me on this. Thanks in advance.
Hobby Circuits and Small Projects Problems :: 01-28-2008 10:02 :: aghielan :: Replies: 4 :: Views: 2196
Input specifications are
i need output of 5v under 1a current
---------- Post added at 09:51 ---------- Previous post was at 09:49 ----------
I need a normal power supply
Power Electronics :: 04-05-2012 12:51 :: MOHAMMED YOUNUS M :: Replies: 5 :: Views: 1160
I think my question is very elementary! I'm confused!
What if i have 12v 2A power supply, i will connect it to a relay, gadgets with a current rating of 1 Ampere?
Is there a effect on the gadget/relay?
Electronic Elementary Questions :: 09-14-2012 12:27 :: peterjohn0000 :: Replies: 5 :: Views: 514
I have been reverse engineering a power supply circuit that has the IC BP35A in it. I have carried out exhaustive search and cannot seem to find anything on said IC. Is there anyone that can shed some light on the matter. Please help.
PCB Routing Schematic Layout software and Simulation :: 08-29-2013 03:04 :: rafayimran :: Replies: 0 :: Views: 227
I found a bipolar power supply circuit and used it for a while successfully. I got +15 (V) and -15 (V). But now I get +15 (V) and -22 (V). Input voltage sof the voltage regulators are +35 (V) and -35 (V). In addition, when measuring the voltage at the point indicated by the arrow I get 75 VAC (!!!). Is this normal for such a (...)
Electronic Elementary Questions :: 01-13-2014 06:24 :: gusts :: Replies: 3 :: Views: 223
I need to build 220VAC to 12vDC, 100Amps power supply circuit with current limiting.
I also need to biuld a 220VAC to 3VDC, 100Amps PWM output circuit. Output freq should be adjustable to 50KHz and duty cycle from 0 to 100%.
Protection for back emf is required.
I shall appreciate any suggestions.
Power Electronics :: 10-14-2014 06:59 :: nraulji :: Replies: 1 :: Views: 152
please help me
i need or so much need
psu circuit 24V 5A
Electronic Elementary Questions :: 07-12-2008 22:12 :: ibrahem_mo :: Replies: 10 :: Views: 2120
I would use a fixed voltage regulator 12v 1 amp type, a transformer with a 12v ac secondry decouple with 2 - .1 micFarads capacitors eather side of the regulator and a 2000 uf resivour capacitor and 1amp rectifiers.
Its a prity much a bog standard circuit that you would find in the regulator data sheet.
Professional Hardware and Electronics Design :: 07-29-2002 14:53 :: barrybear :: Replies: 3 :: Views: 3800
Who has already made a ATX power supply from a 12v DC source (from a car sigarette plug)?
How do you handle it?
Professional Hardware and Electronics Design :: 05-08-2003 04:02 :: Roel :: Replies: 1 :: Views: 1544
This shows schematic for 5V and 12v supplies. Can be modified top provide 3.3V if required.
Analog Circuit Design :: 11-15-2004 11:35 :: Colbhaidh :: Replies: 6 :: Views: 6414
need circuit to build my own DC power supply (6V-12v). tq
Hobby Circuits and Small Projects Problems :: 08-04-2005 00:32 :: fhl :: Replies: 8 :: Views: 2214
I have designed a circuit to deliver -12 V , 0.5A using 7912 . However Im doubtful about the current limiting section. Also Im not able to get near exact -12v im getting -12.223 V o/p.
I also need to use a fuse prior to the transformer but I dont know how to calculate its parameters .
I think that overvoltage ( crowbar circuit) will not (...)
Power Electronics :: 08-13-2010 12:33 :: flash23 :: Replies: 1 :: Views: 1835
I'm planning on building a 1.2-18V @ 1.5A variable DC power supply using an LM317 variable regulator. The circuit I plan on following is seen here: Variable DC power supply Using LM317 Regulator . I will be using a 19V @ 6A AC laptop adapter (VERY cheap on eBay, c
Power Electronics :: 08-28-2010 14:04 :: convoluted :: Replies: 2 :: Views: 1483
I think you need to buy the transformer (with 12vAC output), bridge rectifier, 12v regulator (7812 with can housing is good choice, it supports upto 5A current).
Microcontrollers :: 11-27-2011 02:47 :: aftab_s81 :: Replies: 4 :: Views: 716
Several examples (for 5V use zener 5,1V instead 12v or other value) :
Professional Hardware and Electronics Design :: 08-04-2012 03:44 :: tpetar :: Replies: 7 :: Views: 813
I am building the power supply with short circuit protection whose diagram is on the attachment, but the problem is that the two resistors in the diagram are out of reach. Please can anyone help me with a better diagram or recommend a regulator IC (variabla 2V-about 35V) with in built short circuit protection and can handle (...)
Electronic Elementary Questions :: 11-15-2012 02:00 :: Ogu Reginald :: Replies: 12 :: Views: 2130
This must be a specialized power supply because I can't find a replacement (15VDC 400mA). It powers a video tracker device (In the Picture video tracker sold by 21best), and there was a short in the power cord that goes to the tracker, big spark when I connected it, and it now looks like I cooked the power (...)
Electronic Elementary Questions :: 11-28-2012 06:50 :: kande04 :: Replies: 12 :: Views: 907
Thanks for the reply Brian,
ok so im working with a circuit with 4xLM338 with resistors values of 0.1 ohm each. this would give me a power dissipation of 2.5W when 5A is being drawn from each regulator (so i can get the full 20A - LM338 is rated for 5A) so if i choose a 0.1 ohm cement resistor with 5W rating this should be ok?
i have an input vo
Analog Circuit Design :: 10-21-2013 05:07 :: 3BABY :: Replies: 14 :: Views: 881
dear your computer supply must have a 12v output,
why you do not use that supply to run the fans.
Hobby Circuits and Small Projects Problems :: 12-26-2013 06:26 :: shahbaz.ele :: Replies: 2 :: Views: 251
I have a project about making a proposal of a 1.5-12v variable regulated power supply."Coz I have a hard time finding one.Can you give me samples of it, including its schematic and block diagram?
I would be greatful if you could help me.Thanks & more power...
I think that you should give us more infor
Electronic Elementary Questions :: 08-06-2005 21:01 :: semiconductor :: Replies: 4 :: Views: 1325
i want to design a power supply for +/- 15 V and 9 V output. The input to the unit is 230VAC supply. Can anyone give me a circuit to implement this ..
And which power supply is better tranformerless or tranformer circuit?
Analog Circuit Design :: 10-12-2006 01:51 :: sivamit :: Replies: 1 :: Views: 2379
anybody who knows how to construct a simple, low cost, effecient switching power supply good enough as bench power supply for hobby projects.
Professional Hardware and Electronics Design :: 12-12-2006 23:52 :: emavil :: Replies: 2 :: Views: 2427
are you looking for a simple 12v dc power supply or a sophisticated one? where are you planning to use it? if you want a simple one use a 12v regulator ic like the lm7812 fixed positive linear voltage regulator ic, nothing could be simpler than that (zeners are much simpler but not that good). i believe there are lots of (...)
Analog Circuit Design :: 05-03-2007 19:49 :: gelidude :: Replies: 8 :: Views: 1882
I am wanting to power a 12v computer fan for long periods of time seperate from the computer.
I have snipped the end off of a walkie talkie charger and ive been told not to use chargers but this cord was plugged into the base where you put the walkie talkies at, and i think the cable its self could be safe enough to power the fan.
On the (...)
Electronic Elementary Questions :: 10-13-2007 10:41 :: Johnnyy :: Replies: 7 :: Views: 877
what happens when we connect a 1000mfd 12v capacitor across a 12v dc motor and connect a 12v dc power supply.will there be any improvement in the functioning of the motor?
thts very basic question u have...many experts are here.. i tell u shortly,when u connect capacitor parallelly it (...)
Hobby Circuits and Small Projects Problems :: 01-19-2008 07:33 :: Nahian :: Replies: 2 :: Views: 4013
I'm starting in this "world", so forgive me if the question is a bit "dumb".
I'm working with a 'LPS305 Motech' power supply and I want to connect it to give +4v to a circuit. There are a +Vset button and a +Iset button. The problem is that I put +Vset=4volts (and I don't understand the "meaning" of the +Iset button) and the (...)
Analog Circuit Design :: 02-18-2008 11:23 :: Javirulo :: Replies: 2 :: Views: 614
I want to build a dual power supply system and I have designed the following schematic. I want to know you opinion on this circuit.
The way I want it to work is: while there is power on the primary line (transformer) I want the second LM2672 to stay in standby, this is achieved by holding the transistor T1 in (...)
Analog Circuit Design :: 08-18-2008 16:27 :: florinalex :: Replies: 1 :: Views: 1285
I need a circuit diagram of an Integrated power supply for 8 hours backup of my two selling fans and 10 tube lights.I want to build it for my own house.If anybody agree to help me plz post to me a circuit diagram that i can able to know about it easily.
Analog Circuit Design :: 04-21-2009 00:46 :: SAZZAD71 :: Replies: 0 :: Views: 465
i m looking for industrial grade circuit diagram of 32V/2A DC variable power supply? please help me to get get circuit diagram for the same.
Service Manuals, Requests, Repair Tips :: 06-09-2009 09:07 :: Sahara :: Replies: 6 :: Views: 9290
hi. i am looking for 100 volt dc/ 15A min stabilized power supply. i would like to be
adjustable 50-110volt max and at least 15A. thank u
Power Electronics :: 06-15-2009 04:06 :: tzitzikas :: Replies: 5 :: Views: 2364
i found one power supply circuit with that i have some doubts..
please clarify why Two transistors and Zener diode are used here and functions of different capacitor in this circuit
Analog Circuit Design :: 07-20-2009 05:04 :: vijay s :: Replies: 4 :: Views: 1248
hi friends, I want to make power supply using MC33063A and want that circuit get power from battery and at same time charge battery from mains using battery charger. can i get power from battery while it is charging ,by directly connecting wires from battery leads to power (...)
Electronic Elementary Questions :: 01-16-2010 23:41 :: harinder :: Replies: 1 :: Views: 1041
Im planning to make a power supply circuit. my source is 24 v ,5 A battery.how can i regulate the current so as to supply to a 250 mA ,24 V to a 2.45 Mega Ohms load.?
Analog Circuit Design :: 02-26-2010 02:23 :: ghasia :: Replies: 1 :: Views: 755
Have you tried to use only one power supply , the 12v 1A unit.
I think it is more than enough
You can measure the current of one relay to help calculations but i assume less than 100mA
fans 3x 0,12A = 0.36A
relays 4x 0.1A = 0.4A
Unless you have some other device (...)
Electronic Elementary Questions :: 11-30-2010 11:22 :: alexan_e :: Replies: 8 :: Views: 5015
What is the exact use of schottky barrier diode?
Microcontrollers :: 04-06-2011 02:20 :: snaku :: Replies: 6 :: Views: 1570