# Advice 1: How to make the most charger for the car battery

If the car battery is dead and charger is not around, don't despair, it's not a reason to panic. Using parts from the old black and white TV, you can make your own hands a great charger for the car battery.
You will need
• The transformer TS-180-2, wire size 2.5 mm2, four diode Д242А, network plug, a soldering iron, solder, fuses 0.5 A and 10A.
Instruction
1
Take the TS-180-2 (power transformer from black-and-white TV). It has two secondary windings, which are designed for a voltage of 6.4 V and a current of 4.7 A, connect them in series, thus obtained output voltage is equal to 12.8 V. It is enough to charge the battery. On the transformer, connect the wire cross-section 2.5 mm2 pins 9 and 9` and the terminals 10 and 10`, wire cross-section 2.5 mm2 solder a diode bridge which consists of four diodes Д242А, fit and others that are designed for a current of 10 A.
2
Install diodes on the big heat sinks. The diode bridge assemble on glass fibre laminate wafer of the desired size. Connect the primary winding of the transformer in series, place a jumper between terminals 1 and 1` , to the terminals 2 and 2` and solder the cord with plug for 220 V. In the primary and secondary circuits replace fuses, respectively – 0.5 A and 10 A.
3
Unplug the charger. Reconnect the battery. The voltage at the battery terminals during charging should not be more than 14.5 V. To control the current and voltage, connect a charger ammeter with a scale dimension of not less than 10 A, and a voltmeter with a scale dimension of not less than 15 V. Also, it is possible to control with a multimeter, which limit the measuring current should be at least 10 A. Limit the charging current by including in series in the gap "minus" wire 12 Into the light output of 21-60 W.
Note
It is impossible to test the device "on a spark". It is impossible to connect to confuse "+" with "-". Follow fire safety rules. Do not leave the appliance unattended. Definitely obestochivaete device when connected to a battery.
Schematic diagram of the installation: http://sdelai-sam.su/ris/sxema2_640.GIF

# Advice 2: How to make the charger a car battery

The heart of the car is the engine. With that, I'll take all the drivers. But in order to start this heart and then monitor his work, feeding all kinds of sensors and devices, there is a rechargeable battery. Why this name? Because it retains and accumulates the electric current and consists of several batteries assembled in a battery. While a car battery is charged, problems with engine start no.
Instruction
1
For vehicle operation are often used acid batteries, i.e. those in which the electrolyte is a sulfuric acid solution in distilled water. Therefore, the technical condition of the battery can be monitored with a hydrometer. It allows you to determine the density of the electrolyte. If it is high - the battery is charged, low – low.
For this purpose you can use the load plug, which shows the voltage of the entire battery or each individual "banks". According to her testimony, you can determine the battery is charged or not, and how stable the voltage.
As soon as it becomes clear that the battery requires recharging, the question arises: "How to do it?" Currently, to purchase the charging device in the store no problem, but if you accidentally on a shelf in the garage gathering dust and AC transformer, step-down the voltage from 220V to 16V, then the issue can be resolved without the store.
2
In addition to the transformer you will need:
• conventional wire rheostat to adjust the force of the charging current;
• ammeter to control the magnitude of the charging current;
• rectifier device;
• the switch included in the circuit of the primary winding of the transformer;
• light bulb included in the circuit of the secondary winding. Once in the secondary winding of the transformer voltage appears, she lights up.
3
Rectifier device do themselves, gathering of the diode rectifier bridge. All the device mount onto a base made of a dielectric material (textolite, plywood, non-melting non-conductive plastic). Based on secure the transformer.
4
From the same material assemble building, which make a lot of holes for cooling of the transformer and rectifier device.
On the front wall of the housing fasten the control lamp of inclusion, switch, ammeter, rheostat.
Output wires from the rectifier device preferably equipped with terminals of different diameter so that when the connection to the battery do not reverse the polarity.
5
Checking compliance with these mandatory conditions, plug the charger into the network, connect the terminals to the battery and rheostat install the required charging current. The value of a control on readings of the ammeter.
Note
In the room where charging the battery, be sure to provide good ventilation. In the process of charging the electrolyte produces hydrogen and its accumulation, even from a spark, may burst.
During the operation of charging the battery be sure to remove the batteries drain holes. Otherwise allocated when charging gas can accumulate under the battery cover, resulting in a possible fit of the case.

# Advice 3: How to make a heater 12 volt

12-volt heater, being Autonomous, will help you to stay warm in the event of a power outage. For heating of the whole premise of his power is not enough, but at least you warm your hands get.
Instruction
1
As housing for heater use metal cans of coffee. It should have a diameter of about 10 cm and a height of about 20 cm Cardboard Bank, for example, from under the chips, is not suitable as a vessel made of plastic or any other material. Drill out the housing a few dozen holes with a diameter of about three millimeters.
2
In the bottom of the can drill a hole under the arm, which can be used U-shaped metal item from the children's designer. Secure the bracket and at its opposite end, place the bayonet socket car bulb brake signal. It needs to be exactly in the middle so the bulb does not touch the walls of banks.
3
In the side wall drill a hole of larger diameter. It insert a bushing of insulating material through which pass two wire cord with a cross section not less than 1 sq mm. connect it to the cartridge. In a cartridge, attach the 12-volt light bulb 25 watts.
4
Close the lid of the jar. To break the cord include 2 amp fuse. Pre-charge in a ventilated area regular car battery using the standard charger. If it is not used for a long time, periodically recharge it. Once in the cold period, disconnect the power supply, connect the battery to a homemade heater. He warmed up in about ten minutes. Don't keep hands on it for too long to not get burned (remember how heated on the radiator: keep your hand while it tolerates heat, then removed, and after some time the tray again). Do not hold on the heater near flammable items do not use in atmosphere with flammable gases and mists.
5
Battery voltage monitor periodically with a voltmeter. If it falls below 10 volts, immediately shut off the heater, otherwise the battery can permanently malfunction.

# Advice 4: How to choose a charger for the batteries

When buying and using rechargeable batteries you should buy them and charging the device, which will greatly extend use battery. The choice of the charger depends on individual needs.
Instruction
1
Buying batteries, check with the sales assistants for information about what type of charger is compatible with your batteries, or find information about it on the Internet.
2
To determine the charge time of the batteries. If every time you will need fast charging, you'd better buy a specially designed charger that can recover batteries in just 10-20 minutes. However, the service life of such devices is small – they quickly wear out and stop working. It is best to choose a model that will charge a full set of batteries in just a few hours.
3
If you are using batteries of several types, for example, "mizinchikov" and "finger" should opt for a combined charger.
4
For those who like to travel by car there is a charger, powered from the cigarette lighter in the car. Using it is very easy to give new life to dead batteries from the camera or player.
5
In the case when often have to charge not end up dead batteries, it is better to buy a device with the function of the battery is fully discharged before new charging. The discharge process lasts only a few minutes, and you can watch it on the LCD screen, which is equipped with such a device. Thanks to this feature, prolongs battery life. This model of charging ideal for owners of energy-intensive cameras.
6
The price of the charger depends on the charging speed and additional functions, for example, liquid crystal indicators, automatic shut-off and other.
7
Try to buy a charger for rechargeable batteries only in specialized shops, ensuring the goods sold guarantee.
Note
You can charge just the battery. They are usually stated 1.2 A.
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