Dc-Dc Converter

This uncomplicated circuit lets you lot run a 1W LED from the battery of your car. IC MC34063 is used hither equally a buck converter. It is a monolithic switching regulator sub-system intended for work equally a DC-DC converter. The device consists of an internal temperature compensated reference, a comparative, a controlled duty-cycle oscillator amongst an active current-limit circuit, a driver in addition to a high-current output switch. These functions are contained inwards an 8-pin dual in-line package. Another major wages of the switching regulator is that it allows increased application flexibility of the output voltage

Another circuit

Conversion of air-conditioning to air-conditioning is quite uncomplicated equally inwards compare to DC to DC converter because it

only implies a transformer which converts air-conditioning from 1 voltage degree to about other voltage
level. But conversion of DC to DC is quite boring piece of work without transformer in addition to more
power losses. Here is simple, low-cost, high precision circuit which converts 6-V DC to
12-V DC without using transformer in addition to slow to build amongst few component.
Circuit description of DC to DC conversion
The circuit of DC to DC conversion is build amongst a really pop IC LM555 used as
multivibrator mood which generate required frequency attain from ii to 10 kHz to drive
power transistor T2. Here potentiometer VR1 is used to adapt output frequency given to
transistor T2 via resistor R3. Influenza A virus subtype H5N1 zener diode inwards this circuit is used equally 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 substance in addition to capacitor C5 is employed for unloosen energy storage. Transistor T1 is
used to command output command amongst the assistance 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; C¬2 = 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