Basic UPS Circuit 5V and 12V DC

electronic circuit diagram

The above diagram is a basic Uninterupted Power Supply (UPS) circuit. This basic UPS circuit is a very simple and inexpensive.

This circuit can be adapted/modified for other regulated and unregulated voltages by using different regulators and batteries. For a 15 Volt regulated supply, you may apply two 12V batteries connected in series (it will become 24V) including a 7815 regulator (will be 15V stabilized voltage output). There is a lot of flexibility in this circuit.

TR1 has a primary matched to the local electrical supply which is 240V in the UK (it might be various for other countries, 110/120V or 220/240V). The secondary winding should be rated at least 12 Volts at 2 Amperes, but can be higher, for example 15 Volts. FS1 is a slow blow type and protects against short circuits on the output, or indeed a faulty cell in a rechargeable battery. LED 1 will light ONLY when the electricity supply is present, with a power failure the LED will go out and output voltage is supplied by the battery.

The capacity to keep up the regulated supply with no electrical supply relies on the load taken from the UPS and also the Ampere hour capacity of the battery. In the event that you were utilizing a 7A/h 12V battery and load from the 5V regulator was 0.5 Amp (and no load from the unregulated supply) then the regulated supply would be maintained for around 14 hours. Greater A/h capacity batterieswould give a more drawn out standby time, and the other way around.

The complete explanation about this basic UPS circuit, please go to this page.


68 thoughts on “Basic UPS Circuit 5V and 12V DC

  1. SANTOSH KUMAR SHARMA

    sir mujhe intex ke ups model 725 ka kit diagram aur mospate ke bare me janna chahte hai 8314 ke badle me kaun laga sakte hai nahi to 8314 number ka mospate kaise milega please call sir

  2. Joseph

    hi.i am designing a project of 12vdc UPS consisting of ac mains and a 12v dc supply.I want the battery to be recharged still by the mains.kindly send me one circuit diagram.

  3. sivaramakrishnan

    sir
    i want full 600 w ups circuit diagram and its component details

  4. wondale Bayeh

    Hi Sir,How u? I need to do a project to develop a single phase PWM inverter for UPS application so please help me by telling the procedure and giving a circuit diagram. Thanks for all

  5. Mahesh

    Hello sir 400 v ups circuit diagram plz send my email thank you

  6. arihant

    why is the battery not charging above 7V in a 12V UPS battery?

  7. haris

    apakah gk da blok diagram yg lbih jlas?
    pls send me
    thanks

  8. babu dk

    Hello sir i need ups circuit diagram of 100VA rating.Can u send me please?

  9. Jiban Acharjee

    please send me a complete circuit and schematic diagram of 600W UPS System and every detail about the UPS.Thank you

  10. HARI

    i need full working principle of ups . that is i want to know how it is changing batteries. please,send me fast i need so much. thank you.

  11. hafeez

    cntact me at eehafiz90@yahoo.com about transformer designing from low level to high level. even final year project regarding transformer

  12. circuit diagram

    you may try to find the computer UPS at http://powersupply88.com

  13. computer UPS

    i need computer UPS circuit diagram help me..

  14. circuit diagram

    it very complicated “reason”. the first you need to do ti to check the voltage before and after the transformer. be careful since it has high voltage output

  15. reymie

    i want to know….why inverter ups fault?what the reason?and how to solve this problem?

  16. afaque

    hi, dear friends, i have made a little bit research on transistor, if any body is interested to have the discusion with me on this topic. .Feel free to contact me on:
    afaque.manzoor@iba-suk.edu.pk
    03338864849

  17. amir

    hi
    i want to diagram ups inverter with full detail
    please send me soon
    thank you

  18. Benny

    Please send a 500va ups diagram preferably emerge.Thanks and God Bless u

  19. phjeyachandran

    please send one 500va ups diagram preferably emerge

  20. KAMALAHASAN

    dear sir,
    Please send basic ups diagram of 1000VA and how to mange the problems

  21. Muhammad Razzak

    I need to 1000watt ups diagram and detail

  22. Muhammad Razzak

    please send 1000watt ups cricut diagram

  23. asjad

    i need a ups diagram in converting 24vdc or 12vdc to 240ac 50hz…thanks

  24. andy

    i need a ups cct diagram in converting 28Vdc to 240Vac 50hz.. thanks

  25. vaidya suryakant m.

    i required ups circuit diagram upto 10kva

  26. rachit

    dear sir/maam,
    I am an engg. student and need to make a simple ups as my project . it would be grateful if u please send me an easy to construct and make working ups .

  27. Duru Emmanuel

    please send me a complete circuit and schematic diagram of 12V UPS System and every detail about the UPS.Thank you

  28. Manash

    Dear sir,
    Iam an electrical &electronic student of nattakom polytechnic. I need a circuit diagram for ups of 12v battery . This circuit is used for my project work please send me circuit diagram and details.

  29. R.Arul karthikeyan

    sir,
    I need a ON-LINE UPS,OFF LINE UPS BLOCK DIAGRAM PLS SENT ME

  30. Akindeji

    Please do you have a component that can help boost 0.5 dc up to 12 dc or a bit below?
    Please reach me through dejiola2001@aol.com

  31. ali

    sir kindly send me the simple ckt diagrams of elt ckts like ups inverter m in dae 3rd year i need an idea to make a project would u like to me sir i,ll be gratfull to you

    thank you

  32. Hareesh

    Whether an isolation transformer is required technically on incoming and outgoing side of the UPS system? The UPS system (10 kVA) is envisaged for a reverse osmosis plant.

  33. circuit diagram

    I’m sorry i don’t have the circuit you’ve requested.

  34. Arun KM

    Dear sir,
    Iam an electrical &electronic student of nattakom polytechnic. I need a circuit diagram for 1KVA ups of 12v battery . This circuit is used for my project work please send me circuit diagram and details.

  35. Arif

    Dear,Sir,
    I require 10kva 1phase circuit diagram.please send the circuit diagram and details

  36. Arul dass

    Dear sir i am take my final year project is seawater battery.One cell of saltwater battery is contain 0.5v and 3mA. To seres the cell to increase voltage 12V and parallel the cell 6mA are produced.This 12v,6mA are increased to 12V,5A output. please send the circuit diagram and details

  37. yeboah samuel jonas

    dear sir,i am an electrical engineer of sunyani polytechnic,i need a circuit diagram of ups of two batteries of which one can take over after the first battery has completely discharged. pls i am using it for my project work.

  38. Mulugeta

    I need ups diagram for computer purpose would u please send me

  39. rajesh

    i’d be very much pleased if could send me a circuit diagram for 2kva ups of 12v battery combinations.thank you.

  40. john excellence

    please,send me step by step circuit diagram of computer ups.

  41. koolportal

    i need the circuit diagram of the simplest ups with a non complicated circuit??

  42. rajyo

    i need a circiut diagram of a ups wit motorbike bttry 12v wit 240v output

  43. ryan favelle

    how could i use a circuit like such to be a dumb DC-DC UPS, effectively a source switch, where it only switches to battery when the primary input either fails or falls below a certain wattage, e.g. 90W

  44. IMRAN

    Hi, I am a student of EEE, My project is UPS. Anybody pls help me by giving a full ups circuit. I will be very grateful to him.

  45. Sebastian D`costa

    I need an details of the ups circuit diagram 7 the parts of the ups details.

  46. M TAHIR

    I NEED A UPS CIRCUT DIAGRAM PLEASE SEND ME .THANKYOU

  47. Khan

    dear sir i need a circuit diagram input12v dc out put 220 or 240v Ac

  48. umair

    kindly sent me simple diagram of ups with 12v motorcycle battery with output 220v.

  49. adnan

    i am a engineering student and i want to complete my project. kindly send me a simple and unexpensive ups circuit diagrame

  50. akala adeoye

    i need a circuit diagram of a ups that uses two 12v/9amps batteries.what may be the problem that a ups will not supply when remove from main power source or when there is power outbreak.

  51. charles

    please send me a ups circuit diagram that uses 12v dc battery which has the power of 500va

  52. Ellappan

    I nedd a 12V I/P and 220V O/P from a car battery, can you send it please..

  53. pipol

    I need a 500va UPS circuit diagram. Can you provide me? please

  54. Zaighum Rafique Butt

    Dear,
    Kindly send me 1 Kva UPS circuit diagram,thnaks.

  55. mark

    hi there
    i need a circuit diagram of a ups with car battry 12V with 240V output

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