Free Electronic Circuit Schematics » Power converter

DC to AC Inverter Circuit with IC555 and TIP42A

admin — Fri, 04 Jun 2010 05:17:18 +0000

DC to AC with IC555 circuit

AC to DC IC Series DC-AC inverter produces an output voltage alternating voltage network.

IC 555 configured for Low Frequency Oscillator. Frequency can be changed 1950-1960 change frequency meter Hz potens R4.

This DC-AC inverter schematic produces output AC power, and frequency. 555 is set to a low frequency oscillator, tunable in the frequency range 50-60 Hz, R4 potentiometer.

555 feeds output (which Q1 and Q2) to the transformer T1, a reverse filament transformer with the necessary step to turns ratio. Capacitor C4 and coil L1 filter the input T1, assuring that it is virtually a sine wave. Adjust the voltage of T1.
Output (in watts) you must select the different parts.

input voltage is anywhere +5 V +15 V DC, operating voltage CAP 2700uF adjust accordingly.
Q1 are the types of compensation: TIP41B, TIP41C, NTE196, ECG196, etc. Q2 types of parts are: TIP42B, TIP42C, NTE197, ECG197, etc. Do not be afraid to use another type of similar characteristics, only one transistor. ..

Parts List:

R1 = 10K
R2 = 100K
R3 = 100 ohms
R4 = 50K potmeter, Linear
C1, C2 = 0.1uF
C3 = 0.01uF
C4 = 2700uF
Q1 = TIP41A, NPN, or its equivalent
Q2 = TIP42A, PNP or equivalent
L1 = 1UH
T1 = filament transformer selection

If everything works well. If not, relax and do not get frustrated. Check the following:

1. You have connected the filament transformer so contrary?
2. Otherwise, unplug the power cord and vice versa. If you have, disconnect the transformer and measure the voltage after the L1 and the earth.
3. Only if the bottom of this neighborhood is the same as the negative (-).
4. Q1/Q2 are oposites, e.i. NPN / PNP.
5. Is it 555 defective? Remove the pin from 3:03 R3 to control impulses.
6. Check the transistor to make sure they are intact.

Error: Pin 7 and 2 were reversed. The original pin was correct.

12 to 9 volt Convertor Circuit with amp booster

admin — Tue, 01 Jun 2010 02:30:22 +0000

Convertor 12V to 9V Circuit1

Today we have convertor circuit for supply 12 to 9 volt.

Thus as picture right side

Electrictronic parts list:
R1 = 560 ohms
C1 = 1000uF/40V, electrolyte
10uF/25V = C2, electrolyte
C3 = 330nF, ceramic
Z1 = 9.1V, ZENER 1watt
Q1 = ECG184, NTE184

Remark:

Convertor 12V to 9V Circuit2

In order to obtain a more accurate output voltage, replace the Zener diode Z1 with 10V and R1 with a potentiometer 1Kilo ohms. Coolrib for Q1 is optional, but recommended. You can replace the Q1 type to get more efficient production amplifiers depending on your requirements. Simple circuit to power your 9 volt cassette recorder and other stuff.

Simple 12-9 volt DC to DC converter BD139

admin — Fri, 29 Jan 2010 01:55:59 +0000

Description:

simple 12 to 9 volt dc-dc converter circuit

This circuit is a DC voltage output from a small DC input generate large voltage.It ’s easy and quick to do, and reducing the value of the Z-diode, the circuit can be universally adapted to other output devices of the circuit voltages. The give and all diagrams represent a DC converter with 12V battery 9 volt DC input and output.

With the 10V zener diode, as in the diagram, the output voltage is approximately 9.3 volts DC. The supply voltage is used, should always be at least a few volts higher than the Zener voltage. In this example, I have a 12 Volt DC battery to provide regulated 9-volt DC output.

12V to 9,7.5,6 VDC converter with 2N3055

admin — Thu, 12 Nov 2009 02:54:23 +0000

: 12Vdc to 9,7.5,6 Vdc circuit

This simple converter using a Zener diode and a transistor into a 9V DC 12V DC battery power to the maximum 1A. The circuit is very simple to build, and requires only 3 electronic components, resistors, zener diodes and transistors. The 2N3055 transistors, 1N4738A Zener diode or Zener voltage and the same power. 3W, and possibly wire wound resistor 3R type. Powering a useful tool to use 9V DC.

The output voltage of the following formula:
Zener voltage Vout = + 0.65V, 0.65V, which is the base-emitter voltage of transistor

12volt to 9volt car adapter circuit with ECG184

admin — Tue, 15 Sep 2009 01:55:55 +0000

car converter 12 to 9 Vdc circuit

This car converter 12 VDC to 9 VDC converters side

for audio ,playstation,DVD,tv etc., is that we have designed for 12DC to 9DC converters that we bring to our design circuit . They are all effective in Switch Mode Power Supplies regulated output. We have developed a series of DC-DC power supply models ranging from 1 watt to 500 watts, which we incorporated into the new controller of DC converters. We are also developing new areas whenever necessary to meet customer requirements. We can provide some custom products that changes on the following products and fully custom DC-DC, new products, such as DC Battery Backup Power Supplies.

AC voltage light dimmers circuit with SCR

admin — Sun, 28 Jun 2009 13:55:40 +0000

Dimmers for the house usually work in one of 2 ways.
Old style dimmers use a variable resistor. As resistance increases, the voltage drops. As someone rightly said, V = IR. While the tension has fallen, you do not really save much energy as the energy is transformed into heat.

: AC voltage dimmer circuit

Newer style dimmers use the fact that we use and AC power supply and a semiconductor triac called pure, or ’switch to triode alternating current. ” This is similar to a diode or transistor. This type of dimmer is not to reduce tension, but it swich on and off. This is the kind of drive the most commonly used in homes over the past 25 years.

How it works? Our 240-volt AC is nothing but the RMS (root mean square) of the tension that will provide positive to negative, provided in the form of a sine wave.

In Australia, it is provided at 50 Hz (or cycles per second), each half cycle is 1/100th of a second (not 1/120th). How modern dimmer switch works is that it chops a part of the sinusoid at each time the voltage changes from positive to negative. Most of this period (ie the part of 1/100th of a second), the dimmer the bulb. Each period of the sine wave is cut, there is no power being applied to the bulb.

This is a somewhat simplified version of history. Although a triac is used in the circuit, thus is a variable resistor, like the old style dimmer, but it is used to modify the flow of electricity in a capacitor which is used to fire the triac.

There is a 3rd type of dimmer that is most frequently used in commercial applications, for example, lighting of the theater. This method uses an autotransformer instead of a triac. This dims the lights by increasing the voltage from the light circuit. A tap on the mobile autotransformer adjusts the step-down action to mitigate the lights at different levels. This method does not hum or flicker that occurs with triac devices in May.

DC to AC converter 12 to 100 Voltage circuit with IC

admin — Sun, 28 Jun 2009 13:06:27 +0000

: DC-AC converter 12 to 100 V circuit

An AC-DC voltage converter with electrically isolated with onput and output circuits and converters with a transformer with at least one primary coil and a capacitor resonance said coil to at least one primary school.

A switching transistor whose collector-emitter path is connected in series at least a coil and the primary school to the transistor switching system for the storage in the database of the surface sensors.

switching power transistor provides the foundation for the transistor switching system, and by other means in order to increase the voltage transmitter Collector of the transistor switching and deliver a response to such an increase and at least in the period immediately after the increase.

one while driving for the transistor circuit, the additional base current is very progressive with a predetermined, so that the storage of the relatively constant switching transistor in the beach for the operation of the converter.

DC-DC Converter 5 to 30 Voltage circuit with IC CD1846P

admin — Sun, 28 Jun 2009 12:21:38 +0000

DC-DC converter 5 to30 V circuit

This project in adjustable voltage for power source is DC-DC Converter 5 to 30 Voltage circuit with IC CD1846P

Step down converter with IC MC34063A

admin — Sun, 21 Jun 2009 13:02:34 +0000

Step down converter with MC34063A circuit

The step down converter is the power unit to make the output voltage which is lower than the input voltage.

The converter which was made this time makes +2V to +10V output voltage with the input voltage of +12V.

Because it makes the limitation value of the input electric current about 1.3A, the maximum with the input electric power is about 16W.

DC to DC Converter 3 to 85 V Circuit

admin — Sat, 13 Jun 2009 05:02:21 +0000

DC to DC converters for 3 to 85V are important in portable electronic devices such as cellular phones and laptop computers, which are supplied with power from batteries primarily.

DC to DC converter 3 to 85 V Circuit

Circuit above is electronic devices often contain several sub-circuits, each with its own voltage level requirement different than that supplied by the battery or an external supply (sometimes higher or lower than the supply voltage, and possibly even negative voltage). Additionally, the battery voltage declines as its stored power is drained. Switched DC to DC converters offer a method to increase voltage from a partially lowered battery voltage thereby saving space instead of using multiple batteries to accomplish the same thing.