Automotive battery - an electric battery for vehicles. The battery powers a number of automotive systems, such as the engine control unit, injector, starter, lighting equipment. Various chargers are used to charge the batteries. If you know how to work with a soldering iron and understand the designations of electrical circuit diagrams, you can assemble a simple charger in one evening.
It is necessary
- -transformer from tube TV - 1;
- - diodes KD 2010 - 4;
- - 600 ohm resistor, 5 watts - 1;
- -tumbler for 15 A, 250 V - 1;
- - LED for 12-15 V - 1;
- - mains fuse for 1 A - 1;
- - network plug - 1.
Instructions
Step 1
Purchase a powerful transformer from the power supply unit of a tube black-and-white domestic TV on the radio market. If you have such a TV lying around at home, dismantle the transformer from it. Disassemble the transformer by freeing the windings from the core. Determine where the mains winding is at the transformer. To do this, check the resistance of all windings with a multimeter. The mains winding will have the highest ohmic resistance. Remove all windings from the transformer and leave only the mains. Among the wires that you remove will be a long copper wire with a diameter of 2 millimeters. Wind the secondary winding of the transformer with it in the amount of 55 turns with a tap from the 10th turn.
Step 2
Purchase powerful semiconductor diodes, for example, KD 2010, at a radio store. They will be required to make a diode bridge - a network rectifier. The photo on the left shows the recommended type of diode bridge mounting. If the diodes become excessively hot during operation, install each of them on a separate small radiator. In the same place, buy a mains plug, a 1 amp mains fuse, a 600 ohm 5 watt resistor, as well as any LED designed for a voltage of at least 12 volts.
Step 3
Start assembling the charger according to the schematic diagram shown in the photo on the left. Connect the mains fuse FU1 to the mains plug. Solder the resulting short-circuit protection to the primary winding of the Tr1 mains transformer. Further, in accordance with the photo above, assemble a network rectifier - a diode bridge on a separate board. Connect it to the secondary winding of the transformer according to the schematic diagram. Through the toggle switch, connect the diode bridge connection to the 10 volt and 15 volt transformer outputs. Solder a chain consisting of resistor R1 and LED La1 to the rectifier output. The resistor limits the current flowing through the LED. The LED is used to indicate the operation of the device. If the LED does not light up, swap its leads.
Step 4
By changing the position of the toggle switch, you will receive a different voltage and a different charging current at the output of the charger. The voltage is 15 volts, according to the scheme - for fast charging of batteries (within 6 hours). The voltage is 10 volts, according to the scheme - for slow, but better quality battery charging (within 10 hours). After assembling and checking the operation of the device, look for a housing that matches the size of the structure you have assembled.
