Online solutios





Tune the variable resistor RV2 to cut off the charging after the desired level of voltage. For a 12V lead acid battery, charging cut off on 13.8 volts will be sufficient.

TRANSIFORMER should be 14acV -15acV . and at least 5AMP

BR1 (BRIDGE) Rectifier.

CAPACITOR C1, C2, C3  should be 1000uF/25V or greater.

RV1 (variable resistor) 10K for controlling brightness of the display.

ARDI (ARDUINO UNO R3) Control unit.

RST (RESET SWITCH)  for reset control unit

RV3 (variable resistor) 1K for battery voltage reading connected to pin A2/PC2 in arduino. 

RV4 (variable resistor) 1K for battery charging status connected to pin A1/PC1 in 

RV5 (variable resistor) 1K for full battery status connected to pin A0/PC0 in arduino. 

D1 (LED) for showing not charging status.

D2 (LED) for showing charging status.

D5 & D6 ( RECTIFIER DIODE) for blocking voltage from battery .

C3 (10uF) ,R3 (1K) ,BC 547 is a NPN transistor, used to drive the electromagnetic relay to cut voltage  supply to battery.

U1 (LM78O5 voltage regurator) for FIVE voltage supply to LCD.

LCD1 (1602 LCD) for displaying voltage status during charging and when stopped charging.

If you feel any technical difficulty, then you may CONTACT ME,


Post a Comment


  1. Hallo,
    Wo finde ich den Sketch für den 12V Charger?
    M. Kratz

  2. I know a professional hacker cyberspysolution@gmail. com who has worked for me once this month. He offers legit services such as clearing of bad records online without being traced back to you, He clone phones, hack Facebook account, instagram, WhatsApp, emails, Twitter, bank accounts, Skype, FIXES CREDIT REPORTs, track calls. He also help retrieve accounts that have been taking by hackers. His charges are affordable, reliable and 100% safe. Contact him via address below...
    Email...cyberspysolution@gmail. com
    Whatsapp:.+1(832) 413-3896

  3. Anonymous3.3.22

    hello, where can I contact you? can I ask for the code of arduino?

  4. Anonymous28.4.22

    Please beware there are many fake bitcoin mining/clouding out there, I have been a victim once but now a certified blockchain consultant and I know better. The whole plan was so smooth I could not doubt it. Bitcoin is actually a great investment option but one thing I discovered over time is that it is not possible to mine bitcoin so don’t be deceived. I invested $25000 on a particular website called eurekaminingblock, I monitored the profit yielding but was told to open a new blockchain account to receive my payout. A public wallet was imported into the account and I was made to believe that was my profit. The bitcoin was labelled non spendable and it took me 2 years to be able to access it without the knowledge of the company. The non spendable bitcoin is the scam out there now and a lot of people are falling victim of it. I found Richard Romero (a recovery expert and trader) on Quora who helped me access a significant part of my investment together with the profit without the knowledge of the company. You can reach him through his email : { DONALDCYBERLORD(@) GMAILCOM } Email: DONALDCYBERLORD (@) @GMAIL.COM WhatsApp: ‪+49 1512 4836801

  5. I just have to introduce this hacker that I have been working with him on getting my credit score been boosted across the Equifax, TransUnion and Experian report. He made a lot of good changes on my credit report by erasing all the past eviction, bad collections and DUI off my credit report history and also increased my FICO score above 876 across my three credit bureaus report you can contact him for all kind of hacks . Email him here go on their website for more details,Whatsapp No:+14106350697 if you want to chat them up,One thing i can assure you would not regret this at all he is 100% legit.

  6. I hired Mr THOMAS to hack my wife’s phone, it was due to a change in behavior of my wife and she far exceeded my expectations. He helped me get some info such as whatsapp chat, facebook, text messages, call logs and even phone conversations that I needed for proof of her unholy affair. The first time we spoke, we had a very long phone consultation in which she gave me options that could help me to resolve my case, and he even recommended I try other options before hiring him, which shows that he is honest. I decided to hire him and I am glad I did. He is a fantastic hacker. To all that desire to know the sincere status of your partner. I will encourage you not to hesitate to send him a letter through if you are facing challenges in your relationship, marriage or having hacking related problems.

  7. Anonymous12.10.23

    Hey everyone, I don't really know much about this hacking thing's but I can direct you to a professional hacking company who helped me to track and hack my girlfriend's iPhone and his Facebook respectively.. If you need to check on your partner's sincerity, employee's honesty, recover your email passwords, Social networks (i.e. Facebook, Twitter, IG), change your school grades, clear your criminal records, gain access to bank accounts,spy on phone. you can just contact them at. Their charges are minimal and negotiable contact them at TOMCYBERGHOST@GMAIL.COM tell him you are from me.