DC-TO-DC converter

[guclusat]

Conversion of AC to AC is quite simple as in compare to DC to DC converter because it only implies a transformer which converts AC from one voltage level to another voltage level. But conversion of DC to DC is quite tedious work without transformer and more power losses. Here is simple, low-cost, high precision circuit which converts 6-V DC to 12-V DC without using transformer and easy to construct with few component.

Circuit description of DC to DC conversion
The circuit of DC to DC conversion is build with a very popular IC LM555 used as multivibrator mood which generate required frequency range from 2 to 10 kHz to drive power transistor T2. Here potentiometer VR1 is used to adjust output frequency given to transistor T2 via resistor R3. A zener diode in this circuit is used as voltage regulator which regulates voltage to 12 volt.

Here Inductor L1 of 100 turns, 24 SWG enameled copper wire wounded on a 40mm dia. toroidial ferrite core and capacitor C5 is employed for energy storage. Transistor T1 is used to control output control with the help of resistor R4 R5.



PARTS LIST
Resistors (all ¼-watt, ± 5% Carbon)

R1, R2, R5 = 10 KΩ
R3, R4 = 220 Ω 1/2-watt
VR1 = 47 KΩ

Capacitors
C1 = 0.0047 µF
C2 = 0.01 µF
C3 = 0.1 µF
C4 = 470 µF/25V
C5 = 2200 µF/35V

Semiconductors
D1 = 1N4007
D2 = Zener 12V, 500mA ½-watt
T1 = BC549
T2 = BD139
IC1 = NE555 timer IC

Miscellaneous
L1 = 100 Turns, 24 SWG insulated copper wire on 40mm Dia. toroidal core

 

[guclusat]

Step up DC DC Converter using LT1615 up to 34 V

The schematic diagram come from circuit: Step up DC / DC Converter with LT1615 power supply. Go to that page to read the explanation about above power supply related circuit diagram.Simple Converter to Power UV Lamp
This simple converter to power UV lamp scheme is a simple converter to power the ultraviolet lamp low voltage. The power supply can be applied using the 6? batteries of 1.5V? or a power supply with an output current of ...

Step up DC / DC Converter with LT1615
Interesting DC / DC converter Linear Technology has presented the company, this chip is the boost converters that allow you to get the maximum voltage in 34B with the input voltage from 1.2V to 15V. It comes in a compact ...

Converter 3v to 5v
We see that almost all of which are available today in addition to the microcontroller powered by a battery. But if we do not want a 5V in many cells in series ... You can use the Converter 3v to ...

Simple 12V to 9, 7.5 or 6V converter
You're traveling and you forgot to bring DC to DC converter in your car, but you need it. This simple DC to DC converter circuit can help you. This DC to DC converter circuit enables transistorized items such as radio, ...

6 Volt power supply based on two LiPo batteries and voltage step-down converter
On the specific energy density of Lithium Polymer (LiPo) batteries are superior to most other types of batteries. Rated output voltage they are also more: 3.7V against 1.2 ... 2 others. But if necessary, replace the old 6-volt battery lithium-polymer

 

[guclusat]

DC to DC Converter 12V to ± 38V

The core of the Car DC to DC Converter 12V to ± 38 VDC is a pulse generator built on the TL494 chip. The circuit is designed to provide power supply to Monoblock Car Amplifier TDA7294. Generator frequency can be changed by varying the resistor R3. Optionally, you can download the datasheet and find out more details on chips.

All resistors (except R4, R9, R10) is 0.25 W, you can even enggunakan 0.125 Watt, R9, R10 – 2W, R4 – you can use an 1W (or 0.5 W). Diode VD1 is placed at the entrance to protect against reverse polarity, is eliminated. Choke L1 in my case, wound on a ferrite ring with a diameter of about 2 cm from the computer power supply. It contains 10 turns double wire 0.8 mm in diameter that are distributed around the ring. This reactor can also be wound on a ferrite rod diameter 8-10mm and a length of 2-3cm. Probably the most difficult in the converter is the correct construction of the transformer, because it is very dependent on the ability of the unit overall. For sample in this Car DC to DC Converter 12 V to ±38 V project transformer wound on a ferrite ring marked 2000 NM size 40 * 25 * 11.