85 Threads found on edaboard.com: Psu Schematic
Anyone have this bestec 12z psu schematic ..
Service Manuals, Requests, Repair Tips :: 09.05.2010 17:14 :: dvmman :: Replies: 0 :: Views: 611
Can anyone explain the difference when using a negative rail regulated(positive pass thru) psu when powering a HAM radio?
Where do I find some negative rail psu schematic to try one with let's say 13,8Vx15A?
Analog Circuit Design :: 30.10.2005 13:51 :: fjpompeo :: Replies: 0 :: Views: 415
hi there.. please help me.. i attached a PC psu schematic below from
can you please help me to rearrange the schematic below into diagram block?? i mean which part of the schematic is clasified into which block, for example maybe where is the PWM controller from the schematic.., maybe where is the e
Analog Circuit Design :: 28.11.2005 03:38 :: zhi_yi :: Replies: 0 :: Views: 2201
I'm in need of a psu schematic to use my PC in Car. I´m previously used an inverter successfully, but why convert DC to AC and back to DC again?
Could anyone help me with a schematic with "easy-to-obtain" parts ?
Analog Circuit Design :: 04.07.2008 12:25 :: ewandeur :: Replies: 5 :: Views: 2596
Funai plasma TV, F42PDME schematic diagram is available online. However, Funai doesn't include the power supply diagram. Any one has idea how to get the diagram? Why the manufacturer doesn't want to release this?
ASIC Design Methodologies and Tools (Digital) :: 27.09.2009 20:05 :: Reek :: Replies: 0 :: Views: 978
Hello, I have seen this dual rail capacitor charge psu.
Could you please explain how the capacitor charge mechanism works for both rails?
Analog Circuit Design :: 05.11.2012 06:26 :: neazoi :: Replies: 8 :: Views: 521
Full schematic/project for a good quality bench power supply anybody please?. Commercial Dual Laboratory type would do just fine
Professional Hardware and Electronics Design :: 01.08.2002 12:12 :: Git :: Replies: 7 :: Views: 2100
Can somebody help me with a schematic to a Radius (Mitsubishi) PrecisionView 21 colour disp Mod:THN9175SKTKW FCC ID:HUXTHN9175SKTKW
, or help me with some values on resistors in the psu?
Service Manuals, Requests, Repair Tips :: 09.09.2003 03:00 :: janne :: Replies: 2 :: Views: 1352
Need a design for a switch mode psu to drive two Peltier modules- either 12volt 25 amp or 24 volt 12 amps.
Can anyone please help?
Professional Hardware and Electronics Design :: 10.09.2003 05:24 :: darksky041257 :: Replies: 2 :: Views: 1739
I need a schematic of a 13,8V(+-5%) x 20A NEGATIVE RAIL linear psu to drive a Sony SSB CB or a Kenwood TS120(all mode) HF or an Yaesu 70W FM/VHF 2 meter (one at a time TX, all RX) ratio 3 minute TX, 5 minute RX
Fernnado - PU2PLL - Brazil
Hobby Circuits and Small Projects Problems :: 01.01.2004 11:57 :: fjpompeo :: Replies: 9 :: Views: 2103
where i can get the explanation about how psu working??
Service Manuals, Requests, Repair Tips :: 09.06.2008 08:36 :: e_eja :: Replies: 20 :: Views: 28275
Set of 5 DVD (>20GB) with schematics, user and service manuals:
CAR alarm (4.83MB)
CAR radio (908MB)
CARS - MOTOS (429MB)
CB - RTX (2.62GB)
CCD foto-video (874MB)
CD - DVD (170MB)
Clean machine (1.14MB)
GSM - Pag
Service Manuals, Requests, Repair Tips :: 26.02.2004 03:00 :: mk :: Replies: 1 :: Views: 1789
I need schematic from AC Adapter HP C6405-60014 from DeskJet 710C. Thanks in advance.
Service Manuals, Requests, Repair Tips :: 01.06.2004 13:40 :: rodolfo :: Replies: 0 :: Views: 1045
The picture below is my psu design. I want to assemble one psu for my own LAB.
Specification: 1.25 ->24V, 4A with short circuit protection, overload and overvoltage protection also. The stability is 2% (for 4A sink, the output is decreased but not below 98% of max value)
- My transformer is capable of providing upto 30VAC and 10A
Electronic Elementary Questions :: 24.11.2004 13:15 :: semiconductor :: Replies: 17 :: Views: 3941
Here is the schematic of an ATX psu:
As you can see there is a feedback path from the +5V and +12v outputs - maybe
you could modify your supply and route them to your load instead. Use shielded
If the electrical noise level is very high you might need to build a differential
sense circuit o
Analog Circuit Design :: 23.01.2005 08:24 :: XNOX_Rambo :: Replies: 2 :: Views: 1572
If you intend to use the psu for an audio amplifier, it will be better to use the classic one with transformer, bridge rectifier and high value capacitors. A SMPS, cannot stand the peak values demands of the amplifier.
Analog Circuit Design :: 18.03.2005 06:04 :: marie65 :: Replies: 4 :: Views: 8609
I am Breneer 18 yrs old from Philippines and I want to know if someone in the group knows where I can find the schematic diagram of the Power Supply SH-250A. Help!!! E-mail ----Breneer(it's better to put our talents somewhere else. ok!)
Microcontrollers :: 20.03.2005 06:59 :: breneer :: Replies: 0 :: Views: 1107
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: 798
I have been looking for a good circuit of a "laboratory" power supply. I finally found this one. That looks fairly good. It features a floating regulator that could be scalable to more voltage. And selects diferent secondaries to keep down the power dissipation at the series regulator.
Analog Circuit Design :: 13.12.2005 17:04 :: albert22 :: Replies: 6 :: Views: 11430
I know that this is a very unusual configuration so I need a schematic of a linear psu that uses a centre tapped trafo and a two diode in a negative configuration but uses a 2N3055 with the colector connected in the tap of the trafo, I mean the positive rail has it's output controlled with this 2N3055 and the negative output is connected direct in
Analog Circuit Design :: 22.01.2006 18:52 :: fjpompeo :: Replies: 1 :: Views: 1982
I am in need of a 15v 1a max regulated psu to regulate a fluctuating 10-15v input source.
Does anyone have a schematic for the above?
I was recommended the LM2577....
Analog Circuit Design :: 13.07.2006 08:05 :: mathsinstrument :: Replies: 1 :: Views: 507
I am looking for switch-mode psu based on TL494 IC.
The requirement is 13.8V @ 15A or higher.
I saw someone on the net use old PC AT psu and rip-it up and make psu out of it!
Is this safe? That beast have around 400V at several Amps on the Primary-side and could cause.. you know what.
Anyone hv built or design one (safely) pls share it (...)
Hobby Circuits and Small Projects Problems :: 18.08.2006 04:02 :: dindeds :: Replies: 5 :: Views: 4739
i found an article on philips scopes in an old i think 'television' magazine
was if i remember going on about the electrolytic caps in its psu being crap etc
it didnt give the whole circuit just the psu and parts of its drivers
with stuff to change
i followed this at the time and fixed my own 50mhz philips PM3215
ill look t
Service Manuals, Requests, Repair Tips :: 02.09.2006 06:05 :: VSMVDD :: Replies: 7 :: Views: 5307
i have a 32"lcd tv which uses a li shin 0420d02216 psu board,the board should deliver 12v dc and 24v dc to the power distribution board.but i only get the 12v nothing from the 24v side.i understand from people ive spoke to , that both voltages should be present when mains is applied,i have tried to get some info on this psu but have got no where.ha
Service Manuals, Requests, Repair Tips :: 17.09.2006 15:26 :: mason :: Replies: 0 :: Views: 1843
Hi, for +/- 12, +/-5 , why don't u use the 300W ATX psu schematic available on the net. or u could use ur old psu.
With a little modification to it, u can also get the 24VDC.
Service Manuals, Requests, Repair Tips :: 03.10.2006 23:30 :: snabilat :: Replies: 4 :: Views: 1529
anybody has schematic of psu with constant output voltage at 5V and constant current output?? I need it for my ADC design
Analog Circuit Design :: 17.10.2006 07:34 :: ex4 :: Replies: 2 :: Views: 834
i need schematic on transformerless psu with this spec :
- AC IN 220V
- DC OUT 12V or adjustable using regulator ic
- dc current minimum of 500mA
Analog Circuit Design :: 09.11.2006 20:53 :: ex4 :: Replies: 3 :: Views: 1757
I bought a new high-power blower that needs +24V @ 15 amps. I am looking for a cost-effective way to power this thing, when I realized I have several old computer power supplies laying around. Two are identical, 400W, and have single +12V rails capable of 25 amps. My question is this: Can I link 2 computer psu's in series to get +24VDC? (Can I atta
Electronic Elementary Questions :: 11.02.2009 13:30 :: k2rage101 :: Replies: 3 :: Views: 737
I would like to get the schematic diagram for pmp 11.48 sic telephone exchange psu. 2 resistors were burnt near the bridge diodes circuits.The color codes are not clear.
So, I would like to check and know these values.
Thanks in advance.
Service Manuals, Requests, Repair Tips :: 10.05.2009 23:08 :: DavidNelly :: Replies: 1 :: Views: 2001
How much current needs?
As far as I can see looking from other TWT psu on the internet, a current of 10-15mA would be enough
Analog Circuit Design :: 04.03.2010 04:11 :: neazoi :: Replies: 7 :: Views: 1998
I need an output voltage monitor to my psu. Was thinking to use a LM3914 with 12V lower limit and 15V upper limit so 13,8V will be 7th led lighted up in dot mode so it'll inform clearly output voltage.
Analog Circuit Design :: 09.06.2010 09:38 :: fjpompeo :: Replies: 1 :: Views: 1043
This is a very usefull circuit
Electronic Parts and schematic Diagram: 95 Watt Laptop Power Supply For Car.
Power Electronics :: 19.11.2010 04:25 :: grittinjames :: Replies: 0 :: Views: 543
I have recently received several power supplies ranging from 8V/5A to 18V/3A and one has fantastically stable output regulation. I have done a bunch of tests and their is almost no measurable ripple and on overload the the current ever rises above the variable set point and the voltage drops without a single spike!
Two others however do not have
Analog Circuit Design :: 27.02.2011 19:13 :: iceblu3710 :: Replies: 0 :: Views: 229
I am trying to find a schematic for a -5V psu that can be derived from +5V or +9V input voltage. Current consumption is about 300-500mA. My transformer has not gor a center tap. I would like to use a +9v from a jack wall
I am going to use this to feed some opamps
The simplest the better, I would prever the use of linear regulators.
Analog Circuit Design :: 29.04.2011 04:31 :: neazoi :: Replies: 19 :: Views: 866
I have a copy of the repair schematics for my power supply and I spent the weekend tracing out components and verifying connections and values. The PCB is 95% the same as the schematic outside of an extra transistor to drive the output FET and a few diodes (You can see them drawn in on the cct)
Analog Circuit Design :: 14.08.2011 19:32 :: iceblu3710 :: Replies: 3 :: Views: 382
It's not a complete psu schematic, e.g. not showing the LVcc supply or AC/DC stage. Multiple linked outputs should basically work in the flyback configuration, although they don't fit the high leakage inductance transformer design so well. The same problem applies to a possible auxilary winding.
Electronic Elementary Questions :: 23.08.2011 16:22 :: FvM :: Replies: 1 :: Views: 255
The transformer is that used in an IDE psu 220 ac input, 12v 2A 5V 2A output.
It is an EI ferrite transformer with
a gap between the center leg of the E shaped part and the I part ,the center leg is cylindrical.
Its dimensions and number of turns for each winding are known (i have dismantled it).
I found IDE psu schematic (or (...)
Power Electronics :: 19.09.2011 04:20 :: koshary :: Replies: 2 :: Views: 431
Sounds like you overloaded it. I would personely scrap it, unless you can see a component that has obviously burnt out.
The reason is without proper test equipment like a mulitmeter and scope and a schematic of the psu then it could be very difficult to establish what has gone wrong.
Multiple components could have been destroyed or any one of m
Service Manuals, Requests, Repair Tips :: 24.09.2011 13:42 :: chris109 :: Replies: 1 :: Views: 587
I suppose I should have looked before I leaped. I bought three of these motors. I also bought this power supply. I am told that because of the high winding indu
Hobby Circuits and Small Projects Problems :: 14.11.2011 15:59 :: kodex :: Replies: 14 :: Views: 3127
You find it here.....................
USB Mass Storage Device Using a PIC? MCU
? 2005 Microchip Technology Inc.
PC Programming and Interfacing :: 18.11.2011 02:53 :: kak111 :: Replies: 1 :: Views: 1002
The battery is the cleanest psu of all and for RF and small signal work this does matter. Since some of my projects are based on RF stuff, I mainly experience the effects of non-battery based psus on them, so I have decided to build a lead acid battery psu that will be able to handle a few Amps.
Is there anyone that has done this (...)
Power Electronics :: 26.12.2011 08:09 :: neazoi :: Replies: 1 :: Views: 384
From your post it seems like there is a typo error in the ''2SK1189''
Yes, the original part is 2SK1199 ... sorry for typo.
In attachement there is the psu schematic where I have to substitute Q1 (and some open resistors).
Thanks a lot!
Service Manuals, Requests, Repair Tips :: 28.01.2012 15:45 :: emastyle :: Replies: 5 :: Views: 694
i have hisense lcd with psu inverter board rsag7.820.1459/roh ver.f
their is an smd ic,S AND RESISTORS BERNT
PLEESE CAN ANY ONE HELP
THANKS AND REGARDS
Service Manuals, Requests, Repair Tips :: 29.09.2012 15:43 :: starski50 :: Replies: 4 :: Views: 1548
I'm just thinking. Is there anyway we can build a circuit that can support both 9V battery and a 9V psu? I mean like, if the user got battery, he can use the 9V battery. And when the battery finish, he can plug in the 9V power supply unit. I'm thinking if we put 9V battery and the 9V psu to on together, if the battery is a nonchargeable t
Analog Circuit Design :: 28.03.2012 23:49 :: maniac84 :: Replies: 9 :: Views: 343
I need a Leadman (POWMAX) LP6100 schematic diagram . This psu has the problem in primary section of both MJE13007 . After repairing the Primary section this psu is running automatically when I attach power cord with it !!! It doesn't need to be switch !! I have checked the controller section - every diodes, transistors and PF's are OK , (...)
Service Manuals, Requests, Repair Tips :: 12.05.2012 00:12 :: Strange Problem :: Replies: 0 :: Views: 451
The one on the left side shouldn't be there, it looks to be an error on the schematic. The others are OK, they are all on the secondary side of the transformer.
You sometimes see high value resistors or low value capacitors between the primary and secondary sides but these are always safety rated high voltage parts and are there to provide a tiny
Service Manuals, Requests, Repair Tips :: 01.08.2012 12:15 :: betwixt :: Replies: 11 :: Views: 821
Hello i was reading some information about greinacher cascade multiplier, and thought that if it is possible i can use it in my tube amps and preamps, because it can save me huge costs (replacing hv transformer with lower voltage and greater amperage)
Is it possible ? should i need special capacitors ? electrolytic or not ? special or typical di
Power Electronics :: 30.08.2012 10:09 :: thebadtall :: Replies: 5 :: Views: 406
here's a few ideas
- drop the 0.3R to 0.1R if you mount all active devices on a CPU cooler with low speed fan.
- use a series pass transistor as PWM controlled charger to maintain a lower Voltage drop on the regulators or use a stock SMPS to maintain a 2 V drop on the linear regulator.
- use a lower
Power Electronics :: 13.04.2013 20:40 :: SunnySkyguy :: Replies: 16 :: Views: 711
A friend of mine gave me an old psu, PCChips MXM-145TF1, previously taken apart, and I wanted to convert it into a bench power supply.
I have tried to power it up with no success. Apparently, one of the high voltage switching transistors was removed.
I would like to know if anyone has one of these power supplies or its sch
Service Manuals, Requests, Repair Tips :: 02.06.2013 16:20 :: GranTotem :: Replies: 0 :: Views: 394
Looks nice, do you have any specs like voltage range, max load, ...
The only thing that seam to be missing is a lcd display for V/A readings.
Does anyone have any more designs of mcu controlled psu's?
Hobby Circuits and Small Projects Problems :: 23.02.2003 14:05 :: froggy :: Replies: 4 :: Views: 6127