This simple
circuit lets you run a 1W LED from the battery of your car. IC MC34063 is used here as a buck converter. It is a
monolithic switching regulator sub-system intended for use as a DC-DC converter. The device consists
of an internal temperature- compensated reference, a comparator, a
controlled duty-cycle oscillator with an active current-limit circuit, a driver and a high-current output switch. These functions are contained
in an 8-pin dual in-line package. Another major advantage of the switching regulator
is that it allows increased application flexibility of the
output voltage
Another circuit
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
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; C¬2 = 0.01 µF; C3
= 0.1 µF; C4 = 470 µF/25V;
C5 = 2200 µF/35V
D1 = 1N4007; D2 = Zener 12V, 500mA ½-watt; T1 = BC549; T2 = BD139;
IC1 = NE555 timer IC
L1 = 100 Turns, 24 SWG insulated copper
wire on 40mm Dia. toroidal core
