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49 Threads found on Psu Schematic
Repairable - certainly. Finding its value - difficult without a schematic or another psu for comparison. From what I can see, it is wired in the primary (high voltage) side of the isolating transformer. It is therefore likely that one or more of the three power transistors lined up between the transformer and reservoir capacitors (bottom of first
Hi, I want to build a simple lab psu with the LT3080. I have two of these regulators plus a multitap transformer, taken out from a commercial LM317 psu. I need the whole psu to be very small in size, smallest possible, but not SMpsu. My proposed schematic is attached. Note that the Vcontrol is connected to (...)
Hello, i have a nice ERA BV030-6935.0 L 50/60Hz mains transformer that outputs 2x6V (I think it can be connected in series for 1x12v. at 6v it outputs 333mA and has a fuse at 400mA. I need a schematic for a suitable low power psu, to use it for more serious RF use, so it has to be very clean and low noise. These linear regulators are noisy and hav
My past experience of multiple transistor 'darlington' configurations in big psus is not good. Under short circuit, there is a risk (especially with slow op-amps) of excessive current causing failure of one of the drivers, BC337 & 2SC1173 in this design, which results in unregulated voltage and current flowing to the load. I would have some concer
I am looking for a schematic diagram or service manual for this old Kepco 2 kV@10 mA power supply. The manual is available still from Kepco but cost way more than what I paid for the psu. Thanks E
Hello, Recently I salvaged a transformer out of a variable power supply. The power supply used this multi-tapped transformer to drive a LM317 and depended on the tap it output the relevant output voltage at 1A max. I yould like to use this transformer (1A) to buils a small versalite psu for the lab experiments, since 1A is enough for most of th
Hello, We are going to use the Meanwell HRPG-600-48 psu (48V, 13A, Offline) to power our four 105W Buck LED drivers. (Iout=3A, Vout = 35V, fsw = 200KHz, CCM, non-synchronised) All the four LED drivers, when considered together, only have 80uF of input capacitance, due to PCB room constraints. Therefore, as you can imagine, most of the rippl
Anyone who can share a copy of the schematic and calibration procedure for this triple output psu? It was also sold as a Tektronix model CPS 250. The original design was done by Topward Electronics I believe.
This psu in one of my PC systems has died, I've bought a new one to keep me in business but the old one is in almost perfect condition so it seems a waste to throw it out when it could be repaired. I can't find a schematic and the thing is so cluttered it would take ages to trace the schematic, has anyone got a copy already? I know there (...)
Hello I am building a microcontroller project using an ATMega644. Acording to the datasheet this draws less than 1mA at 1MHz, although I run it at 20MHZ in my project. I need to make a transformerless psu for this project and I have found two schematics. ht
I can't be specific without a schematic but in general, when an SMPS fails to start up, the culprit is usually a dried up capacitor on the primary side. Most of this kind of psu need a 'kick' to start them running and it usually comes from the current flowing through a capacitor as it charges. The lower value when it dries out means less current an
Hello, I have seen this dual rail capacitor charge psu. Could you please explain how the capacitor charge mechanism works for both rails?
Hi, 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 , (...)
This is the type of socket Keith means. Most power supplies have the centre contact positive (a few stupid ones are reversed, just to try to blow up people's kit). The outer contact is switched, as can be seen in the schematic. Pin A is the centre contact, B is the outer contact, and C is the switched pin in the socket. With no plug inserted, pi
hi all 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
Hello, 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 (...)
You find it here..................... USB Mass Storage Device Using a PIC? MCU ? 2005 Microchip Technology Inc.
I am told that because of the high winding inductance of the motor, the psu will not have enough power to drive these motors. An important parameter in the selection or design of the driver is the current it sends through the coils of the motor. The current specified for the motor is the maximum current that is allowable per phase
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
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 (...)
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.
the mains psu appears to be using a phase shift bridge 3525 won't be able to drive it, I think. @grizedale: As you apparently have the device at your fingertips - why don't you extract the full schematic?
Hi All, This is a very usefull circuit Electronic Parts and schematic Diagram: 95 Watt Laptop Power Supply For Car. Thanks Grittin
Hi all, 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. 73, Fernando
Anyone have this bestec 12z psu schematic .. Thanks
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?
Hi ! 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 ? Tks !
Hello colleagues, 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. David
Hello 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 thanx
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.
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 (...)
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....
This TV-chassi is a digital 100Hz produced 1998.Does anyone have the schematic as PDF-file for sale? The fault:The picture is just around 17",it should be 28",there are also est/west-fault.The psu are OK.Grateful for help. AKAI TV-2561 and TV-2861 has the same chassi.
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
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
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? Regards, Fernando
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!)
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.
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 wires. If the electrical noise level is very high you might need to build a differential sense circuit o
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 - Va
I need schematic from AC Adapter HP C6405-60014 from DeskJet 710C. Thanks in advance.
where i can get the explanation about how psu working??
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 Regards, Fernnado - PU2PLL - Brazil
Hi! I am trying to design a 24V DC 80A SMPS supply having a input supply from 90 to 275 VAC. I would appreciate help in design this psu. What precautions I need to take? Any guiding schematic will be appreciated. Thanks Bye!
i'm searching for complete schematic or psu schematics for digital sat receiver XSAT 401 THANKS KDP
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?
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?
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?
Full schematic/project for a good quality bench power supply anybody please?. Commercial Dual Laboratory type would do just fine Git