Charge Battery|Baterai 12 Volt

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Skema rangkaian Battery Charge designed as a constant voltage source with a negative temperature coefficient. Transistor Q1 (BD 140) is used as the temperature sensor. transistor Q2 is used to prevent the battery from discharging through R1 when the mains power is not available. Rangkaian Battery Charge is designed based on the voltage regulator IC LM350. The output voltage of the charger can be adjusted between 13-15 V by varying the POT R6.

Gambar Skema Rangkaian Charge Battery 12 Volt

The LM350 will try to keep the voltage drop between its input pin and the output pin at a constant value of 1.25V. So there will be a constant current flow through the resistor R1. Q1 act here as a temperature sensor with the help of components R6/R3/R4 which more or less control the base current of Q1. As the emitter/base connection of transitor Q1, just like any other semiconductor, contains a temperature coefficient of -2mV/°C, the output voltage will also show a negative temperature coefficient. That one is only a factor of 4 larger, because of the variation of the emitter/basis of Q1 multiplied by the division factor of P1/R3/R4. This results in approximately -8mV/°C. The LED will glow whenever the mains power is available.

Rankaian Charge HP Menggunakan battery AA (3 volt)

type='html'>Rankaia Charge hp Menggunakan battery AA (3 volt)
With this tiny thing you can almost charge all the devices which are charged via the USB, like iPod or cellphones, with only two Aa-Cells!

Thus why I should build this?
The reason is completely simple: I am bored empty batteries (IPod, cellphone) while I 'am on the outward journey. And the solution with the linear regulator as 7805 is in fact very
simple, but very unefficient, because: firstly you need a provisioning which provides approximately 3 volts more than you need for the usb and secondly the majority of the cases the difference enters the tension of entry and the tension of output are lost in heat.
The solution to the problem comes from linear technology. Compenent most important of the cicuit presented in the next stages is LT1301 . It is a small stage
to the top of the converter for establishing the mode of commutation actuate the supplys with only some external components.

Skema Rangkaian Charge HP Menggunakan battery AA

Rangkaian Charge Spesifikasi:

• Input: 1,5 to 3 volts
• Output: 5 Volts @ 200mA max. (really enough to charge an iPod mini or a mobile phone, trust me ;-) )
• Watts and efficiency:
• In: 0,95W at 2,5 V
• Out: 0,875W at 5 V
• loss: 0,075W
• 8 percent loss
• 92% efficiency

The input capacitator should be as close as possible to pin 6 (Vin) of the LT1301!
Keep all cicuit traces short! Directly tie Pin1(GND) Pin8 (PGND) and Pin3 (Shutdown) togheter and connect it to ground. Avoid long soldering times for to prevent destruction of components by overheating... For the detailed placement of the components on the circuit board you can use your own creativity...

So much now its fact, but before connecting it to any device usb, is sure that functions correctly! (the tension should be 5 volts, the LED only would owe rougeoyer, etc) when all ischecked and you are sure that all works you can (if you like it) start to put the hot cast iron around it as a a little protection. If you would put 't as the hot cast iron you can put device in a box of matches or very which you want. left wing of the image you see an older version of the right-sided than you see the smaller and increased version newer

Rangkaian Charge Monitor for 12V battery

type='html'>This circuit project is a function for monitoring the charge level of 12 volt batteries continuously. The circuit possesses two vital features:

1. reduces the requirement of human attention by about 85%.
2. highly accurate and sophisticated methods.

A battery is a vital element of any battery-backed system. In many cases the battery is more expensive than the systems it is backing up. We need to Adopt Hence all practical measures to Conserve battery life.

As per manufacturer's data sheets, a 12V rechargeable battery operated Should be within 10. IV and 13.8V. When the battery charges higher than 13.8V it is said to be overcharged, and it discharges below 10.IV Pls Can it be Deeply discharged. A single event of overcharge or deep discharge Can bring down the charge-holding capacity of a battery by 15 to 20%.

Skema rangkaian charge monitor for 12V battery

Note:

For calibrating the upper and lower reference levels, a digital multimeter and a variable regulated power supply source are required. For calibrating the lower reference voltage, follow the steps given below:

• Set the output of power supply source to 10. IV.
• Connect the power supply source in place of the battery.
• Now the display will show some reading. At this point vary preset VR2 until the reading on the display just changes from 1 to 0.
• The higher reference voltage is calibrated similarly by setting the power supply to 13.8V and varying preset VR1 until reading on the display just changes from 8 to 9.

How to Work a Circuit of Charge Monitor for 12V Battery

Input from the battery under test is applied to LM3914 1C. This applied voltage is ranked anywhere between 0 and 10, depending upon its magnitude. The lower reference voltage of 10.IV is ranked '0' and the upper voltage of 13.8V is ranked as '10.' (Outputs 9 and 10 are logically ORed in this circuit.) This calibration of reference voltages is explained above.

1C 74LS147 is a decimal-to-BCD priority encoder which converts the output of LM3914 into its BCD complement. The true BCD is obtained by using the hex inverter 74LS04. This BCD output is displayed as a decimal digit after con version using IC5 (74LS247), which is a BCD-to-seven-segment decoder/driver. The seven-segment LED display (LTS-542) is used because it is easy to read compared to a bar graph or, for that matter, an analogue meter. The charge status of the battery can be quickly calculated from the display. For instance, if the display shows 4, it means that the battery is charged to 40 per cent of its maximum value of 13.8V.

The use of digital principles enables us to employ a buzzer that sounds whenever there is an overcharge or deep discharge, or there is a need to conserve battery charge. A buzzer is wired in the circuit such that it sounds whenever battery-charge falls to ten per cent. At this point it is recommended that unnecessary load be switched off and the remaining charge be conserved for more important purposes.

Another simple combinational logic circuit can also be designed that will sound the buzzer when the display shows 9. Further charging should be stopped at this point in order to pre vent overcharge.