Car Battery Charger


Rating: 0.00 / 5 
Battery Charger Circuits / Power Supply Circuits
This Charger Can't be used as a Power Supply, Without having a battery in place. The Battery MUST be Connected to get power out. Note: This Charger Features a Reverse polarity Indicator. Instructions: Before plugging this charger into the 110 volt line (or turning it on if you use a Switch), FIRST Connect this Charger to the Battery. In doing so, No Damage will occur if the battery is accidently connected in reverse, but the Reverse Polarity LED will light up. If that LED Does light, Reconnect the battery Correctly, than apply the 110 line voltage. Connecting the Line voltage, With a reversed battery connection, WILL Result in Damage. Especially if you don't use the fuse on the output, as shown in the schematic. Although Not Shown in the schematic, A suitable Line fuse would also be advisable.
Car Battery Charger - schematic

There is No Amp-Meter shown, But I would Definately recommend including one in either the positive or negative line, going to the battery. The Transformer, Diodes and SCR, Must be caplable of handling the output current. And Don't use a 10 amp transformer. If you expect to charge battery's at 10 amps, Allow youself a Safety margin! Use a 15 Amp transformer. Also the Diodes and SCR will Definately require a Suitable, LARGE Heat Sink! The 100 ohm trimpot on the PCB sets the Maximum Charge Voltage. To set this Correctly, attach a Fully charged battery to the output. Than using a meter to monitor the output,Set the trimpot to give an output of 14.5 volts at Very Near ZERO CURRENT. I Show a Center Tapped Transformer and two Diodes, But a Single output, 16 Volt transformer could be use with a full wave bridge rectifier. Some manufacturers recommend Charges with a Low Output, AC Ripple content. If this concerns you, You can add a large Filter Cap across the output. However this Capacitor will NOT be Protected by a reversed battery, unless it is connect before the fuse in that line.

Recommended videos

  • How To Make A 12 Volt 5 Amp Battery Charger - DIY Technology Tutorial - Guidecentral
    Duration: 1:52.
  • How to make a 12 Volt car battery charger
    Duration: 7:23.
  • Populaire video


  • EE Times
    Designing a that works over the “universal input range” (85-265 VAC) can be useful for certain applications that are taken to different regions, such as cell phone or a laptop supply. Many manufacturers would like the convenience <
     22 June 2016
  • Power Engineering Magazine
    EnerSys, the global leader in stored energy solutions for industrial applications, manufactures and distributes reserve power and motive power batteries, battery , power equipment, battery accessories and outdoor equipment enclosure solutions
     22 June 2016
  • EETE Power Management (registration)
    EETE Power Management (registration) The NXQ1TXH5 single-chip 5-V Qi wireless transmitter from NXP, and available from Mouser Electronics, is a fully integrated controller and driver IC that enables engineers design a WPC 1.2 Qi-compliant low
     21 June 2016
  • Ukraine Today
    Ukraine Today It will force Russia to invest so much money into building power plants and make seawater into freshwater plants and remaking all the facilities (e.g. buildings, roads, ) needed for the operation of the society That it will ABSO
     19 June 2016
  • ZDNet
    ZDNet ... spotting overheating cabling and providing an instant census of what electronic devices and are on in a room -- potentially useful in an office environment for quickly revealing who's got an illicit wi-fi hotspot (literally) stashe
     17 June 2016
  • Electrek
    Electrek They also often have industrial already in place - or at least easily upgradable. Lastly, the rapid can easily be sited in such a position to be always under observation by the staff and therefore much less likely to be abused
     15 June 2016
  • CompoundSemi Online (press release)
    These four new 1600W and series operate for the full range single phase input 90~264VAC, consisting of various models ranging between 12DC and 48VDC, respectively. In addition to the output programmable function, each standard ...<
     15 June 2016
  • Robohub
    Robohub IEC TC 69: Electric road vehicles and electric industrial trucks, prepares Standards for motors and motor controllers, on-board electrical energy storage systems, and . Since energy for smaller robot delivery vehicles is supplied
     14 June 2016
  • Consulting-Specifying Engineer
    NEC Article 708 permits storage batteries, uninterruptible (UPSs), and fuel cell systems as alternate sources for COPS. ... Where battery power is necessary for generator operation, the must be connected to the COPS. Where ...
     10 June 2016


Leave Comment

characters left: