Monday, June 20, 2016

Simple Inverter Circuit from 12 V up to 120V

This is a Simple Inverter Circuit from 12 V up to 120V elevated , center - tapped (CT) control transformer and four additional components can do the operation. This circuit outputs a clean about 120 volt - 200 volt at 60 Hz and can supply up to 20 Watt. The circuit is self starting and free running. See this simple inverter circuit below :

Simple Inverter Circuit from 12 V up to 120V elevated

Transistor Q1 and Q2 use 2N5877 or similarity .If Q1 is faster and higher gain than Q2 , it will turn on first when aplly the input power and will hold Q2. Load current and the transformer magnetizing current the flows in the upper half of primary coil, and auto transformer supplies the base drive (two transistor) unti the transformer saturates.The transformator can use the 3A CT transformer an use the secondary coil for input and primary coil use to output, And input use the 12 volt secondary coil. Use 12 battery to power input , such as 12 V accu.

12V to 220V Inverter Circuit Diagram

12V to 220V Inverter Circuit Diagrams, Even though today’s electrical appliances are increasingly often self-powered, especially the portable ones you carry around when camping or holidaying in summer, you do still sometimes need a source of 230 V AC - and while we’re about it, why not at a frequency close to that of the mains? As long as the power required from such a source remains relatively low - here we’ve chosen 30 VA - it’s very easy to build an inverter with simple, cheap components that many electronics hobbyists may even already have 12V to 220V Inverter.

12V to 220V Inverter Schematics
Though it is possible to build a more powerful circuit, the complexity caused by the very heavy currents to be handled on the low-voltage side leads to circuits that would be out of place in this summer issue. Let’s not forget, for example, that just to get a meager 1 amp at 230 VAC, the battery primary side would have to handle more than 20 ADC!. The circuit diagram of 12V to 220V Inverter Schematics our project is easy to follow. A classic 555 timer chip, identified as IC1, is configured as an astable multivibrator at a frequency close to 100 Hz, which can be adjusted accurately by means of potentiometer P1.

As the mark/space ratio (duty factor) of the 555 output is a long way from being 1:1 (50%), it is used to drive a D-type flip-flop produced using a CMOS type 4013 IC. This produces perfect complementary square-wave signals (i.e. in antiphase) on its Q and Q outputs suitable for driving the output power transistors. As the output 12V to 220V Inverter current available from the CMOS 4013 is very small, Darlington power transistors are used to arrive at the necessary output current. We have chosen MJ3001s from the now defunct Motorola (only as a semi-conductor manufacturer, of course!) which are cheap and readily available, but any equivalent power Darlington could be used.

These drive a 230 V to 2 × 9 V center-tapped transformer used ‘backwards’ to produce the 230 V output. The presence of the 230 VAC voltage is indicated by a neon light, while a VDR (voltage dependent resistor) type S10K250 or S07K250 clips off the spikes and surges that may appear at the transistor switching points. The output signal this circuit produces is approximately a square wave; only approximately, since it is somewhat distorted by passing through the transformer. Fortunately, it is suitable for the majority of electrical devices it is capable of supplying, whether they be light bulbs, small motors, or power supplies for electronic devices.

PCB layout:
PCB 12V to 220V Inverter Schematics
R1 = 18k?
R2 = 3k3
R3 = 1k
R4,R5 = 1k?5
R6 = VDR S10K250 (or S07K250)
P1 = 100 k potentiometer
C1 = 330nF
C2 = 1000 µF 25V
T1,T2 = MJ3001
IC1 = 555
IC2 = 4013
LA1 = neon light 230 V
F1 = fuse, 5A
TR1 = mains transformer, 2x9V 40VA (see text)
4 solder pins

Note that, even though the circuit is intended and designed for powering by a car battery, i.e. from 12 V, the transformer is specified with a 9 V primary. But at full power you need to allow for a voltage drop of around 3 V between the collector and emitter of the power transistors. This relatively high saturation voltage is in fact a ‘shortcoming’ common to all devices in Darlington configuration, which actually consists of two transistors in one case. We’re suggesting a PCB design to make it easy to construct this project; as the component overlay shows, the PCB only carries the low-power, low-voltage components.

The Darlington transistors should be fitted onto a finned anodized aluminum heat-sink using the standard insulating accessories of mica washers and shouldered washers, as their collectors are connected to the metal cans and would otherwise be short-circuited. An output power of 30 VA implies a current consumption of the order of 3 A from the 12 V battery at the ‘primary side’. So the wires connecting the collectors of the MJ3001s [1] T1 and T2 to the transformer primary, the emitters of T1 and T2 to the battery negative terminal, and the battery positive terminal to the transformer primary will need to have a minimum cross-sectional area of 2 mm2 so as to minimize voltage drop.

The transformer can be any 230 V to 2 × 9 V type, with an E/I iron core or toroidal, rated at around 40 VA. Properly constructed on the board shown here, the circuit should work at once, the only adjustment being to set the output to a frequency of 50 Hz with P1. You should keep in minds that the frequency stability of the 555 is fairly poor by today’s standards, so you shouldn’t rely on it to drive your radio-alarm correctly – but is such a device very useful or indeed desirable to have on holiday anyway? Watch out too for the fact that the output voltage of this inverter is just as dangerous as the mains from your domestic power sockets.

So you need to apply just the same safety rules! Also, the project should be enclosed in a sturdy ABS or diecast so no parts can be touched while in operation. The circuit should not be too difficult to adapt to other mains voltages or frequencies, for example 110 V, 115 V or 127 V, 60 Hz. The AC voltage requires a transformer with a different primary voltage (which here becomes the secondary), and the frequency, some adjusting of P1 and possibly minor changes to the values of timing components R1 and C1 on the 555.
B. Broussas
Another interesting related Circuit : DC 12V to 24V Contverter, 5000W PWM inverter, and other Inverter / Converter Circuit.

How to mixing stereo input to mono output

Here , I will give a circuit of schemes that are used to mixing stereo input to mono output to boost  gain output . Why 2 inputs in to one because, if we need a stereo amplifier we want to become a stronger by combining the two input into one input, so that a higher power output. Actually without any circuit above we can combine stereo amplifier into mono, but the sound output less than the maximum , need for this additional combiner circuit.

How to mixing stereo input to mono output
Part List =
For balance _: R1 / R2=R3 / R4
For balance _: R1 = R3
Gain ______: R5 / R1 = R5 / R3

Wednesday, June 15, 2016

Power Amplifier with digital volume control

Amplifier with digital volume control can we make predictably because the circuit is made simple with just single chip TDA8551. The circuit of Mini Amplifier With Digital Volume Control is a type BTL amplifier with 1 Watt.

Techniques for adjusting the volume in this series has been provided with a pin path control that is controlled by providing an input voltage VCC and GND. The series is also equipped with a selector mute, standby and operating.
Mini amplifier with digital volume control circuit diagram
Mini amplifier with digital volume control schematics

High Performance Audio Power Amplifier

High Audio Power Amplifier is an important part in sound reproduction ina sound system. Audio Power Amplifier with this power IC LM 3886. Audio Power Amplifier is a highly capable and able to produce68 Watt power avg. 4Ohm load and capable of producing power 38 Watt8Ohm load.

With good sound reproduction capabilities of 20Hz-20kHz also possessed this LM3886 Audio Power Amplifier. Audio Power Amplifier LM3886 Speaker is equipped with protection that will protect the circuit output from over-voltage, under-voltage, over-loads, a short circuit power supply, thermal run-away and the temperature peak. Audio Power Amplifier LM3886 also equipped with noise reduction that can keep the audio system from noise well.

Schematic power amplifier with LM3886
Schematic power amplifier with LM3886

Feature owned LM3886 Audio Power Amplifier

  • 68W cont. avg. output power into 4Ω at VCC = ± 28V
  • 38W cont. avg. output power into 8Ω at VCC = ± 28V
  • 50W cont. avg. output power into 8Ω at VCC = ± 35V
  • 135W instantaneous peak output power capability
  • Signal-to-Noise Ratio ≥ 92dB
  • An input mute function
  • Output protection from a short to ground or to the supplies via internal current limiting circuitry
  • Output over-voltage protection against transients from inductive loads
  • Supply under-voltage protection, not allowing internal biasing to occur Pls | VEE | + | VCC | ≤ 12V, Thus eliminating turn-on and turn-off transients
  • 11-lead TO-220 package
  • Wide supply range 20V - 94V

Application of Audio Power Amplifier LM3886

  • Stereo audio system
  • Active Speaker
  • High End Audio Power TV
  • Suround Power Amplifier

Simple 3 Transistor Amplifier

Mini 3 transistor amplifier is a simple amplifier with 50mW power drawn by 3 transitor. The series of three mini-amplifier transistors can be used for loud speaker 8 ohm load. Source voltage required to activate the mini-amplifier can be drawn from the batteries 9V. Circuit of 3 transistor amplifier is often used in simple portabe audio devices such as radios or small tape recorder. Mini-transistor amplifier circuit 3 is quite simple as shown in the figure below.

Simple 3 Transistor Amplifier

Mini-transistor amplifier circuit 3 includes type of amplifier OTL (Output Transformer Less). Mini-transistor amplifier circuit 3 is used for output coupling capacitors. Amplifier circuit is simple and suitable when used for audio amplifier experiment.

5 Channel Equalizer LA3600

5 Channel Equalizer LA3600 [updated] ,One type of preamp tone / tone controls are the Audio Graphic Equalizer. Audio Graphic Equalizer have 2 kinds in my opinion. Namely Audio Graphic Equalizer Bar and the type of parametric type is often called parametric equalizer.

Audio Graphic Equalizer In the article this is the type of bar with 5 channels using IC LA3600. IC LA3600 is a single chip "Audio Graphic Equalizer 5 channel" that is designed specifically for the equalizer five channels. Because IC LA3600 is a special design of the equalizer circuit to make this a simple equalizer. Figure series of Audio Graphic Equalizer 5 channels with IC LA3600 as follows.

5 channel equalizer
Equalizer Schematic

Audio Graphic Equalizer circuit with IC LA3600 above can control the audio frequencies from 108 Hz to 10.8 KHz. Audio frequency which is controlled by this equalizer was 108 HZ, 343 Hz, 1.08 KHz, 3.43 KHz and 10.8 KHz. The frequency of that frequency is set based on the value of 2 pieces of capacitors in each chanelnya. So for instance want to change the center frequency of each channel value of 2 pieces of the capacitor can be changed as desired.

Sunday, June 12, 2016

Simple and Cheap amplifier with IC TA7368P

Indeed , this amplifier is suitable known as the title Simple and Cheap amplifier with IC TA7368P. Viewed from the schematic alreaady seen that this amplifier circuit requires little components and parts were cheap. This amplifier requires 1 piece of IC TA7368P is manufactered by TOSHIBA is the price too low, then in addition to IC amplifier requires 3 components elco capacitor whose value is not too big. Maybe if you make this amplifier circuit, the total price of all must not be more than $ 1. This amplifier only has more than 1W output, perhaps because it has little strengthening it so that the output is released is very small. But to make this is quite easy and not too costly.

Simple and Cheap amplifier with IC TA7368P
Part List :

C1 = 100 uF
C2 = 100uF
C3 = 470uF

IC1 = TA7368P

Good Luck :)

Switching power suplly for color television circuit

Schematic diagram of switching power supply for color television , which can used on a particular color TV, how it works using the switching transformer and switching transistors. At first voltage AC220V entry through the capacitor and resistor, and then immediately rectified AC voltage by 4 diodes and capacitor given on each diode.

After a DC voltage then passes through a capacitor elco in parallel , and into the circuit and the voltage is lowered by the switching transformer. After the voltage is lowered and then was rectified and filtered again in the after circuit, the output voltage is set up on their own. For output +5V and +12V using ic stabilization 7805 and 7812.

Switching power suplly for color television circuit
To use circuit switching power supply can be used on the same output voltage. If the circuit is working you should never ever touch the live area , because of the high-voltage section. And if the circuit has stopped working , do not forget to remove the voltage on the capacitor electrolyte, by linking the two legs to the lamp or solder. After the voltage is completely lost , the circuit is already safe and avoid danger.

Car power amplifier with TA82010AH

IC TA8210AH is ic often used in amplifiers used in the room but also match for car power amplifier, It is suitable for power amplifiers car speakers taht fit and wear ell, surely this amplifier circuit works with a maximum also high quality. Supply voltage is not too high , only 12 VDC and is also good at high current. For high current amplifier power of the stronger . You can use the batteries that have current 10 A or higher . Power output up to 200W stereo with 8 Ohm impedance.

Car power amplifier with TA82010AH

Part List :

R1 =1K
R2 =50K trim
R3 =1K
R4 =50K trim
R5 =680R
R6 =680R
R7 =150K
R8 =2R2
R9 =2R2
C1 =1uF
C2 =1uF
C3 =47uF
C4 =47uF
C5 =100n/400V
C6 =220uF
C7 =220uF
C8 =100n/400V
C9 =100n/400V
X2-3=in R
X2-1=in L
X1-1,X1-2=Out R
X1-3,X1-4=Out L

6V to 220V inverter schematic

This 6V to 220V inverter Circuit schematic is one of the voltage inverter circuit, starting from 6-Volt input on the DC current into 220-volt AC output. For maximum output power up to 30W only, and is also very small voltage current. Input voltage plus the entrance on the transistor Q2 to provide the voltage at the collector and then go on Circumference transformer L1 and enter the base. Emitter will be merged with voltage supplied L2 min. And LED1 is useful as an indicator of whether or not an inverter works especially on the transistor Q2.

6V to 220V schematic circuit diagram
Part List :
R1 = 1K R
R2 = 220R
C1 = 10nF
C2 = 100nF
C3 = 47nF
C4 = 0,22uF 400V
Q1 = 2N5551
Q2 = C5198
LED1 use Green Led

Transformer instruction :
cara membuat trafo step up
The above is figure from a place  plastic for copper wire wrapped around, you can also use the marks that have been unused transformer. For the above number are :
1 : Place for copper wire wrapped,with a diameter of 12mm x 10mm.
2 : Hole to place an iron or ferrite rod , with diameter 10mm.
inverter 6V ke 220V
3 : Copper wire that has been rolled.
4 : Ferrite or iron rods which are mounted on the hole.

To coil L1 as much as 70 times,  L2 200 times,  And L3 as much as 1000 times.
L1 wire diameter 1mm
L2 wire diameter 0.8mm
L3 wire diameter 0.4 mm

Make it this project :D

Handy Headset amplifier via USB

Handy Headset amplifier via USB is a circuit that is used to add a gain on the headset, which is used on a computer headset. Indeed not only on a computer course in all the headset could also, but in this circuit voltage to utilize voltage supply issued on a PC or laptop via USB. So you need not bother looking for supply voltage, you just take it from USB , so this headset amplifier is very handy.

Handy Headset Amplifier Based on IC 4558 , below the schematic diagram :
headset amplifier via usb circuit
Part List :

R1 = 20K
R2 = 10K
R3 = 10K

C1 = 3u3F 50V
C2 = 100pF

D1 = 1N4148
D2 = 1N4148
D3 = 1N4148
D4 = 1N4148

U1 = JRC4558

Connector X1
1 = Output
2 = Input
3 = Ground

Connector X2
1 = V+ 5V from USB
2 = Ground From USB

headset amplifier PCB design
PCB design Views

High impedance balance output circuit

Because of high input impedance required to maximize CMRR, High impedance balance output circuit shown in figure below , has been used for the input impedance is determined solely by the input bias resistance R1 and R2. High impedance balance output circuit also useful for interfacing with valve equipment in the strange world of retro-hi-fi.
High impedance balance output circuit
High impedance balance output circuit
Adding the output cathode followers for valve circuits are expensive and consume a lot of extra energy, so that the output is often taken directly from the anode gain-stage, as a result, even loading bridge the so-called 10 k distortion can seriously endanger performance and output swing available from the source equipment.
All balanced phase dealt with until now have their input impedance is determined by value input resistors, etc., and this can not be raised without lowering the noise performance.
High impedance balance output circuit diagrams above shows one answer to this. Input op-amp itself is quite a lot has infi nite
Impedance in terms of audio, so the input impedance is determined by the need to R1, R2 bias non-inverting input. A property of remarkable and very useful from this circuit is that the addition of Rg resistance increased profits, but maintain the balance of the circuit. This confidentiality guration can not be set to weaken for the advantages of an op-amp with feedback on the series can not decreases below unity.

IC Power Amplifier with OT Trafo

This amplifier circuit uses IC and Trafo OT as an additional amplifier in the output. You can use the transformer output transformer-old has not used but still in good condition, you can use it in this circuit. For this amplifier IC used is M51503L, this ic has a voltage limit of up to 7 volts only and a minimum of the incoming voltage about 2 volts. Actual output issued from the IC is 0.2 Watts, but once applied to the circuit maximum output of about 5.3 Watts.

IC Power Amplifier with Output Transformer Circuit Diagram
IC Power Amplifier with Output Transformer
Part List :

R1 = 75R
R2 = 330R

C1 = 1uF
C2 = 47uF
C3 = 100uF
C4 = 0.33uF
C5 = 0.47uF

T1 = Transformer Output OT240

IC1 = M51503L

Transistor quality checker

Transistor are the components that have never missed on any electronic circuit . To determine whether the quality is still good or is damaged then need for testing of the transistor . This test is needed before it is installed in an electronic circuit to avoid disappointing results in the future. Thus , all transistors are mounted has been declared unsuitable for use . Please note that the damage was not located from the transistors can not stand the temperature is too hot . Therefore emphasized here for use tongs as a heat barrier when soldering each feet transistor. Transistor quality checker circuit diagram :

Transistor quality checker Circuit

Part List Transistor checker tool:
R3=Resistor with adjustable  to the current
Vr1=10K trim
Q1=Transistor socket
S1=Saklar on/off
G1=3V battery

To facilitate testing , the provided holes for the third feet on the transistor Q1. At thefoot of the emitter is connected to the battery (+). Base associated with Vr1, and the collectors associated with R2. The voltage (-) that enter the R3 give amp Meter to check quality of the transistor.

Very cheap IC power amplifier

This amplifier circuit is very cheap, because not a lot of components that are required, and the voltage or amperage required is also not too large, so the transformer or power supply is also quite cheap. IC which can be used in power amplifier circuit is the KA2201, LM820M, TBA820M, U820. This amplifier output of 2 W and 4 ohm impedance, which can be applied to the speaker with 4W power, on such small speakers in front of a PC. For the required minimum input voltage of 3 volts and a maximum of 16 volts, for the recommended voltage of 12 volts.

Power Amplifier Circuit Diagram

Very cheap IC power amplifier

Parts Very cheap IC power amplifier

R1 = 100K
R2 = 120R
R3 = 100R
R4 = 10R

C1 = 0.1uF
C2 = 100uF
C3 = 47uF
C4 = 100uF
C5 = 470uF
C6 = 220pF
C7 = 100nF

U1 = KA2201 , LM820M, TBA820M, U820

Thermal Controlled battery charger

Thermal Controlled battery charge circuit,  One way to charge batteries rapidly without abuse is to measure cell temperature and tapper the charge accordingly. The circuit uses a thermocouple for this function. A second thermocouple nulls out the effects of ambient temperature. The temperature difference between the two thermocouples determines the voltage , which appears at the amplifier's positive input.

thermal controlled battery charger schematic circuit
As battery temperature rises, this small negative voltage ( 1 degree Celcius between the thermocouples equals 40uV ) becomes larger. The amplifier, operating at a gain of 4300, gradually reduces the current through the battery to maintain its inputs at balance. The battery charges at a high rate until heating occurs and the circuit then tapers the charge. The values given in the circuit limit the battery-surface temperature rise over ambient to about 5 Degree Celcius.
Part List charger circuit:

R5_____0.6R 5W





Friday, June 10, 2016

Power Amplifier with IC STK0039

Power amplifier circuit using ic stk 0039 the output of which was issued in this circuit only 35watts maximum, but the sound can be issued harsh , loud , and clear. If the voltage is fit and clean , how to assembly , components are good , the right speakers , this circuit will definitely make a sound that good to hear the ear.
See audio amplifier circuit  below :

power amplifier Stk0039
Technical Information :
Vcc Max = 45V
Vcc TYP = 30V
Po            = 35W
RL           = 8Ohm
Icco TYP = 40mA
Icco Max = 80mA
I Max      = 10A
STK Power amplifier circuit
The amplifier can use to : tuner , subwoofer surround amplifier , surround amplifier , subwoofer system , car amplifier , PC amplifier , DVD/CD amplifier , Room amplifier . Because this amplifier good quality amplifier circuit.
power amplifeir STK

1500 Watt high power amplifier

Circuit of 1500 Watt high power amplifier is very nice to talk about single power amplifier circuit is therefore not o be outdone by the class-A amplifiers. Power amplifier circuit that allows for use on large event that requires a variety of power or power from the amplifier. In reinforcement in block buffer and its driver transistors using high quality, but actually at the end of the transistor amplifier can be dtermined according to needs.
1500Watt power amplifier
1500 Watt high power amplifier
Component List :
R16,R17__________________0,22R 2W
R18,R19__________________10R 5W
C1_______________________10uF 63V
C2_______________________220uF 63V
C6_______________________100n 400V
C11______________________47uF 63V
L________________________10 Turns 0.8 in Diameter
Tr1,Tr2,Tr3,Tr5____________ MPSA92

Saturday, June 04, 2016

Stereo Bass Booster Amplifier

A Bass Booster is an audio device, which amplifies the low frequencies (bass) within the audio spectrum. This operates in a similar manner to an audio equalizer. General-purpose equalizers are often not effective at boosting very low frequencies, and therefore many electronics enthusiasts make their own circuit to achieve this purpose. Using following circuit you can boost frequencies below 60Hz.

Stereo Bass Booster circuit
Stereo Bass Booster TL074 Schematic
Stereo Bass Booster TL074 Schematic

This circuit is an active circuit and used TL074, which include separate four op-amps. Alternatively, you can use any general-purpose op amp such as LM324, TL084, etc. This circuit is not only a bass booster it also include a simple mixer circuit. U1A and U1D are act as mixer, U1B and U1C for the base boosting. I design this circuit for electronic switching. Therefor I used two transistors for it. To enable bass boost connect ‘ubb’ to positive supply. You can use normal switch for it. In addition, it is possible to enable bass boost by applying voltage signal to ‘ubb’, which come from a micro-controller or any other source. This circuit can operate in either single supply or dual power supply.

For single power supply

    Omit C20 and C21.
    Connect positive supply to VDD and Ground (0v) to GND or VAA.
    Max Supply voltage is 12v.

For dual power supply

    Remove J3 (jumper), C15, R19 and R20.
    Add jumper (0 Ohms) for R20 it.
    Connect positive supply to VDD, negative for VAA and Ground (0v) to GND.
    Max Supply voltage is +/-12v.

Please ignore the U2, R21, C16, C18 and P1. Those are not necessary for the operation of this circuit. These parts are optional because that this circuit and PCB were designed for my personal project.

Now connect output of this circuit with amplifier input and give your input to the mixer side. This circuit is ideal for high quality sound. If you want that unique clean high-bass sound then this circuit can provide it.

See alsoSubwoofer Module 4558,
Schematic and PCB files were added to the download and you can download from this site Stereo Bass Booster.