Welcome to ElecCircuit.com — Electronic Circuits and Mini Projects
My name is Mr. Apichet Garaipoom. My Vocation is a writer, and I love to share my experience on this site. I graduated with a diploma as an electronic technician around 1993.

Currently, I need to be an electronics instructor for my daughter because we are homeschooled. Electronics is the only subject I’m good at and can teach my beloved daughter. I tried to teach her through experimentation with real circuits to get the most realistic results. We think her learning experience will be useful for you too.

Thank you to the authors of electronic books from around the world. We believe that the goodwill of these circuits will return to you in the form of happiness and good health.

We apologize if some of our content is incomplete or inaccurate. If you happen to run into one, please notify us, and we will fix it as soon as possible.

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In addition, if you are a manufacturer or distributor of electronic products. We welcome any donation of those tools or products. Of course, it will benefit everyone. Because we will use your products well. Please contact me by this email: [email protected]

Our ElecCircuit Team

Apichet Garaipoom
Apichet Garaipoom
Chayaporn Garaipoom
Chayapohn Garaipoom, Mei (My daughter)

I am a single dad with two children—my son (Chayapol) and my daughter (Chayapohn).

Apichet Garaipoom and Chindrend

Thank you very much for your support. To keep the site running.

67 thoughts on “About Us”

  1. Hi;
    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. @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.

  3. 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.

  4. 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.

  5. 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?

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


  7. 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!!!

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

  9. 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?

  10. 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

  11. 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

  12. 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.

  13. 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.

  14. Hi to you!

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

  15. 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.

  16. 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

  17. 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.

  18. 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.

  19. 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 .

  20. Greetings
    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

  21. 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.

  22. 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!

  23. 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

  24. 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 onpulse@ offpulse control.

  25. 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.

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

  27. 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.


  28. 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

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

  30. 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

  31. Hi,
    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.


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

  33. 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.

  34. 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

  35. Hello
    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

  36. 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?

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

  38. 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

  39. 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.

  40. 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

  41. 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.

    • 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?

  42. 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.

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