Welcome to ElecCircuit.com — Electronic Circuits and Mini Projects

I graduated with a High Vocational Certificate in Electronics. I feel very happy. Because when I graduate.

I immediately have done my favorite job, writer. This work is highly independent. I always learn at the same time as the reader.

I want to have Bachelor’s Degrees. But my age has increased. Making this idea even more distant.

Of course, It doesn’t matter who I am. But I want to help you develop electronics skills.

I have collected lots of electronic circuits and projects. They may be useful for learning and making a hobby.

Though, I am not good enough at explaining Electronics in English.
And sometimes the circuit does not work. I am sorry.

I promise to improve the English language and the content to be as accurate as possible.

But some said that contents are useful. This is encouraged me to share Electronics with people.

Learn from Mistakes

All people do not like mistakes. But it is the best way to learn electronics. Nobody is perfect, me too. I have mistaken a lot. But I like it. Because each time we improve them. We always grow up.
If my posts are wrong. I am ready to learn and improve them.

Thank you

I have been happy that my content is useful to you.

Thank you very very much for your visit to my site.

I thank you for everything that made us meet. Thanks to the internet, thanks to domain name providers, web hosting, WordPress developers, Theme, and plug-in developers, etc.

Thank you so much. The author of electronic books around the world. I like to read and collect interesting electronic circuits. I believe that the good (charity in religion) of these circuits. Will return to you, have happiness and good health. Has developed further electronic works.

And Thanks a lot Google creates a good translation system. Allowing me to improve my language even better. If you do not understand my text. It is because I am improving the use of appropriate English text.

Most importantly, thanks to A manufacturer of high-quality products and services sponsored through Quality Company GlobalSpec, LLC. Thank you very much for working together for more than ten years.

Please Support Me

I love to do this website. And, I have done it full time. It requires a lot of time and energy like other jobs. So, please support me with…

  • Disable the ADS Block to show these Banner. It is free for you!
  • Support me directly through wise.com to my email: [email protected]
    You will get a fee-free transfer and cheaper send money. Do you try yet?

    Thank God through Mr. Lennie Zink for a gift of money of about 200 $. It is a big power for us. I will keep forwarding this good thing to others.

Thank you so much for your support of me. To keep my site running.

About Me

My name is apichet garaipoom. I am a single dad of children.

Thanks for reading.



I always try to make Electronics Learning Easy.


  1. Faizan

    I want a battery monitor circuit that have three LED red,yellow and green.
    When battery votlage is below 3.4V the red LED glows only,when battery votlage is above 3.4V red and yellow glows and when battery reach to 4.1V red,yellow and green LED goes on so please suggest a circuit.Reply soon

  2. @phuoc
    Thanks for tell me
    It correct, please see the pcb.

  3. @Daniel
    Thank for your comment I like it.
    This circuit so old I sorry for not clear , I am new.
    Please wait for me to write this article from my book.

  4. Gary D

    Dearest momename,
    your website is very interesting and potentialy useful, and your efforts and hard work are obvious. Personally I’m still learning much about component level electronic circuitry, and the explanations and descriptions are vital. It is obvious that you struggle with english, or at least your translator does. You might consider posting in english and another language which you speak fluently and can make accurate and helpful remarks in. Just let us know.

    Thank-you for your site, and best wishes.

  5. Hi @Gary D

    Thanks to the impressive site.It is hard work. When using English, I needed translated into English. (You are correct.) I tried to use plain English style. Easier to read.

    I feel uncomfortable. My site is very slow. Because, my poor English. I appreciate everyone’s interest. It is very driving force.
    Thank-you for your comment, and best wishes too.

  6. David

    hello momename,
    i am doing “4 digit sensor counter using mcs51-AT89C1051” as my project. It has been weeks i was looking for 1051 and i couldnt find it, can i just replace with it with other similar controller like AT89C2051 or NTE3100 with the same connections as u did?

  7. Rudy

    Thanks for all the (mostly useful) stuff you put on this website! It is greatly appreciated 🙂

  8. G.N.Nataraj

    Dear friend,
    Indeed your venture is most appreciable. language Long live and wish u all success in your all ventures.


  9. MR OHM 1970

    Dear Sir,,,, I Understand You Perfectly!!! Your Circuits Are Awesome and I Love Your Site!!! Best Regards From Canada And MR.OHM!!!!Momename You Are GREAT!!!

  10. MR OHM 1970

    So Many Projects Here and So Little Time To Build Them All!!! Many Thanks From MR.OHM 1970 for all Your Efforts!!!

  11. vijay

    Last week there was workshop by efy kits
    but the concept was not clear, now aftr seeing your forum it is very useful. can someone tell me how simple wireless controll robot work?

  12. william

    Hi, I have a older Honda motorcycle that is running on a 6v system. Would it be possible to run a 12v dc lighting circuit using a step up transformer? Or is there a better way to go?
    I would be very thankful for any information or ideas that you may have. Thank you

  13. Yan Kanaya

    hi sir,i’m verry happy with your site,coz i’m hobby electronic. From indonesia. Thank’s very much

  14. Yan Kanaya

    hi sir,i’m verry happy with your site,coz i’m hobby electronic. Thank’s very much

  15. Punam shah

    Hi Momename,
    i read your articles,very interesting.
    i want variable 0-130 voltDC supply. with input
    230 volt AC.DC supply can be raise or lower by
    small motor. can you give me circuit for this.
    Punam shah

  16. sherald

    tell me the value for transformer in DIY wireless video and audio sender circuit


    I have been using your web site for about two years and think you are doing a fine job.Keep up the good work.By the way your english is quite good. Thank you,JON.

  18. Hi, JON NOLAN.

    We very very happy to read you sound.

    Thanks for power to us.

    We will keep up this job all times.

  19. vikas sangle

    dear sir
    i am sangle vikas studied in e&tc 3rd year engg. I need your help regardingdelta modulation circuit diagram and component with specification.
    i would be highly obliged if grant me your help.

  20. Georg

    Hi to you!

    Your site is a great project which certainly is interessting for many people.
    Don’t bother about your English.

  21. Hi,Georg
    Thanks for your power to me.
    Many times some people comment my English very poor.

    But I will keep this job.
    And Now I so happy.
    My son like it and will make this as successor indefinitely.

  22. sai

    could u plss get any circuit for 2.1ch amplifier

  23. ulan

    Can’nt ? texs in indonesions language, please..thanks

  24. Hi sir i am the student of electronic and commnication enginnering in 2nd year
    I want to say you that this site is fantistic
    i want some tips to you for my mini projuct

  25. richard

    Watching your so called pro-amps, you use a cheap schematic, which is available on a large of forums on inet and ain’t build pro at all.
    It allmoest looks like you’re a novice yourself.


    Can you help me to build a voltage drop down circuit of from 6 vdc to 3 vdc with minimum loss. I am working on a LED lamp circuit.

  27. G.M.I.P.G.Silva

    pleas i wont and i like learn easy electronic some projects pleas help me i think you can help me also my english are very very poor only wont good hart thank you muditha silva .

  28. ali arbatani

    Thank you for your site
    Have a good work in this field as possible the circuits in your site
    In which a programmingIC can be used for site

  29. Laurie Broughton

    I’m sure someone would be prepared to run through your site and correct the English – it can be quite difficult to follow what you are saying sometimes.

  30. Momename:

    Wonderful circuits! Good diagrams!
    Readers can figure out what you want to say–based on your English level. Keep reading lots of English books and your English will surely improve.
    You are doing a good job!

  31. jose freitas

    Hello, I am an apprentice in electronics and spend a simple circuit to delay the initiation of a relay.

    can help me indicating one of your circuits?

    Thanks for taking my call.

    jose freitas

  32. harish

    I want 2030 ic 4.1 circuit 4 mosfet

  33. ashnuka

    This is a good site. .Wonderful circuits. .u r helping us all.good luck.

  34. asghar

    hi i need a simple circuit for pulse generator edm.
    this edm is a super drill.
    please insert it power mosfet irfp460.
    voltage is abut 120v in open.
    this circuit should adjustiveable [email protected] offpulse control.

  35. Ken Bjørn Nilsson

    Hej Momename. Jeg sidder her og har prøvet at lave en Amp med 2 stk tipl 575 og 52 + volt og 52 – volt. Jeg ville efterligne den gamle Amp som jeg havde engang en starmaker 8041 mixer og det er her du nok kan hjælpe mig. Den på + siden tager signal, ok og den i – går ampærerne fra – til basis. Jeg håber inderligt at du kan hjælpe mig.
    Med Venlig Hilsen Ken Bjørn Nilsson.

  36. sonu

    plz provide us a reverse parking ckt using 555 …..

  37. Neeraj B.Lal

    Really Brother u r doing a very very good job for the electronics hobbysists. Please keep it up & serve the mankind. GOD BLESS:::

  38. Gary

    Your English is easily understood, no need to apologize for it.

    There are not enough people interested in electronics, your site helps the ones that are find useful projects.


  39. Hi Gray,
    Thank you very very much.
    Today we very happy,hear you say that.
    My wife love me that write English, people can read understand.

  40. Jim

    Great site! I really like the DC pwr supply and charging/converter circuits. You have good diagrams, and explain things well. Not only how, but WHY. Your English is fine with me. Keep up the good work! Thanks from Michigan

  41. Hi Jim,
    Thanks for your feedback.
    I am happy very much for you tell me.
    My wife and I promise that we will keep this working continuously.

  42. Charles borromeo

    Hi Momename,I like your easy electronics site, please carry on.
    Thanks From; Charles

  43. sneha

    sir 4 water sensor alarm using LM380,which type of sensor is required pls tell me

  44. Georg

    Hi there,
    thanks for this awesome collection of circuits. It is instructive and useful and your English is absolutely sufficient.
    Best wishes from Germany,

  45. Hi Georg,
    Thanks for your feedback. I will keep my job because useful for everyone.
    I’m happy you can read my English.

  46. I want to use variable to adjust output volt. I want to use output from 3V DC to 12V DC with load of 0.5 amp to 5 amp. I have used 10K to 500K variable but they are burning up in seconds. Please advice

  47. 12 volt DC dimmer circuit using variable is what I required.

  48. Anandalal

    I purchased the automatic off 12v battery charger circuit from your site through paypal. I could download the pdf document but all is striked out. please send me clear document.


  49. Paul

    Hi, Its regarding Professional Solid State Relay,can you pls advise Price of PCB&resistor/cap ratings.

  50. James

    Have question on camera ccd. The wires had a pcb circuit but it fried how can I make a new one to be able to use cameras still.

  51. shambu ss

    sir i want built 1 kw 24 Vdc 40 Amps Mppt inverter can i get pcb with assembles ready, and i want know what is price, how much quantity i place.
    with regards
    shambu ss
    mobile no:-09448125319

  52. W Vijay Kumar

    Nice site and useful to both beginners and professionals. Just wanted to check if you can send me PCB of a few projects you have described. I live in Chennai, India. Look forward to hearing from you. Will pay for PCB + shipping.
    Great work.
    W Vijay Kumar
    Mob +91 9962 477 684

  53. KIM

    Hi. I am interested in electronic.
    I really want to know how does circuit work and how to make circuit precisely.
    I majored in electronics in university
    But my electronic skill not enough to understand complex circuit.
    Would you let me know how i have to study electronic to be expert about electronic?

  54. Iman Gurung

    Excuse me sir,
    How to make dual led flasher using 5 volt with variable resistor. Can you help me please sir.
    Thank you sir.

  55. Shravan

    Sir, I want AC live detector circuits for using high voltage detection I did a circuit by using IC4017 it was working successfully but I need for Over head lines like 33/11kv to detect from ground on words In electricity dept..so many were dying due not traseing out the live supply I kindly request u to give us different circuits to help such people in working high voltage organizations thank u

  56. Salah

    Dear Sir;
    My question is why do we need the Minus voltage? we see sometimes power supply equipped – minus & + plus voltage, for instant like the computer power supply.
    thanks in advance.

  57. Emmanuel Mosekwa

    Good Day..I am kindly request for quotation for this items please I need them

    1.Regulated power supply Dual 0-30V
    2.Decade resistance box DRB 0-10K
    3.Function Generator 0-10MHz
    4.Decade inductance box 0-100mH
    5.CRO 0-30MHz

  58. alnaz

    Hi.how are you?I seeking a good frind in electronic.Im in iran .do you pleasure?excuse me my english language is not good.i saw you in web(electcircuit).where are you from?thanks.

  59. Paramananthan

    Please let me know u r in chennai
    I need many projects
    pls mail me

  60. Bob

    I need a quote for the 4 sound effect osc

    • Udo

      Hello, I am just trying to build the circuit “Digital multimeter circuit using ICL7107”
      A hex inversion buffer “CD 4049” (IC 3) is used. In the circuit, however, the component is probably misrepresented, or the name has been confused. Thus pin 16 is not used in the original (nc), but is connected. In addition, almost all outputs are interconnected, but no input is connected. Can you correct this circuit?

  61. Cor

    Good day sir,mam

    I have look on your side ,but I can not find a simple amplifere for MC to MD input for aplifire
    ( the drawing ,project dont must have RIAA becaus im just it to the input from MD phone.
    The circuit must have only : low nois , lowist deformation.( and chaep afcorse)

    I hoop that you me unterstood .

    Thanks in advance for your time and replay

    Cor Rotterdam Holland

    PS your email adres Yahoo don’t work or Exists ( myn enlische is more ferry poor)

    • Hello, Boateng Jodeph
      I recommend as I understand. The circuit diagram is a combination of parts.
      First, we need to understand the behavior of the device.
      Second, see the working sequence.
      Third, the big circuit comes from many small circuits. Do not need to worry about them.
      However, I like the little circuit than the big circuit.
      I believe that if you always use them. You need to understand them surely.

  62. Hello, Hp.calderon77
    Thanks for your visit my site. What is your helping want?

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