Monday, May 03, 2021

STK 4132 II PCB Layout Single

Power STK (STK4132, 4142, 4152, 4162,4172, 4182, 4192, II) has been used for a long time, which used to be generally used for high-end brand amplifiers or audio which are said to deserve to be called Hi-fi audio even now. And according to the specifications, this STK 4132 power has THD (Total Harmonic Distortion) or the language is very small, the signal defect is very small, which is at least 0.4%, so it's no wonder it has low noise and linearity of sound or clear audio so it may be very worthy to be called Hi-fi audio.

IC STK4132 already contains 2 power amplifiers that are integrated in an IC, so to make a stereo Power Amplifier with an output power of 40 Watts, just an IC STK4132 is enough.

Here is the complete circuit diagram:


The following PCB Layout STK can be used for IC STK 4132, 4142, 4152, 4162,4172, 4182, 4192, II

STK 4132 II PCB Layout Single

This power amplifier is very suitable to be juxtaposed as a satellite speaker to assemble your own 2.1 audio because the sound is clear.

PCB Layout Master Mixer Single Supply 12V

The master mixer circuit is a series of buffers and an increase in the audio signal gain which can be adjusted by the volume pot. The master mixer is classified as an active circuit that uses a dual op-amp IC and the voltage used is 12 volts. In addition, to amplify the sound that usually sounds very weak/small when inputted to the amplifier, and also as an amplifier from other weak audio sources.
This kit is widely applied to power amplifiers so that the sound will kick even more.
This circuit is very helpful and makes your Power Amp louder.

PCB Layout Master Mixer Single Supply 12VDC  Fixed, The layout of resistors that have no value can be filled as desired, for example, 1K Ohm - 10K Ohm, the resistor affects the gain.

PCB Layout Master Mixer Single Supply 12VDC

Wednesday, April 14, 2021

The Differences Between Converters and Inverters

 Does your business work with electrical devices in any capacity? Then you’re probably familiar with the terms converter and inverter. While these devices have similar names and somewhat similar functions, there are some key differences. But let’s start with the common point—converters and converters both convert voltage. What sets the two apart? Well, converters convert an electrical device’s voltage from AC to DC. Inverters, on the other hand, convert the voltage from DC to AC. Essentially, the two devices work in opposite directions.

Why do I need a converter or inverter?

If your business works with electrical appliances and technologies in any way, it’s crucial to know the difference between converters and inverters. When powering up any electrical device, you’ll want to make sure you’re supplying it with the correct level and type of voltage. That’s where converters and inverters come into play. Almost all electronic devices require converters to run safely. For example, to run a desktop computer, you’ll need a converter to change the alternating current running from a power point to a usable direct current at a suitable voltage. Inverters are a little more complicated. You’ll generally find these devices used to convert energy from a battery, fuel cell, or solar panel to AC electricity, making the energy usable in the electric grid. Uninterrupted power services or UPSs also use inverters to access AC power when mains electricity is unavailable.

All about converters

There are a few different types of converters. These types are:

● Digital-to-digital converters, or DDC

● Digital-to-analog converters, or DAC

● Analog-to-digital converters, or ADC

Digital-to-digital converters change digital data from one type to another. Digital-to-analog converters change digital codes to analog signals—you’ll often find them used in computer sound cards, CD players, and digital music players. Analog-to-digital converters convert analog voltage into digital numbers that represent the voltage or current’s magnitude. 

Converters boast various uses, including converting AC to DC energy, detecting modulated radio signals, and providing polarised voltage for welding. Converters can also perform DC to DC conversion. For example, a 12V to 24V converter can double DC power, reducing the necessary wire size in boat, car, and truck electrical systems. This type of conversion can help businesses save money on wire gauges.

All about inverters

Inverters take power from a DC source, such as a solar panel or battery, and convert it into usable AC power. Inverters are especially useful when travelling, allowing car and campervan owners to power AC appliances such as coffee machines and toasters with a DC battery. As an example, an inverter can ‘invert’ power from a 12V DC battery into 110V AC energy, allowing you use to 110V power outlets. Inverters are also often used for induction heating.


In short, converters change voltage from AC to DC, while inverters change voltage from DC to AC. Converters can also be used to perform DC to DC conversion. With your new knowledge about the difference between these two options, you’ll be able to make an informed choice when purchasing inverters or converters for your business.

Sunday, February 28, 2021

Stereo TDA7294 + Stepper High Efficient Amplifier

Hello elcircuit friends, this time elcircuit will post the TDA7294 power amplifier scheme added with the stepper circuit, this stepper circuit serves to increase the efficiency of the TDA7294 amplifier because it uses 2 power supply voltages, namely low voltage, and higher voltage. so the voltage when standby or output is still below the clip point of the low voltage, the medium used to supply the amplifier is the low voltage. and if it approaches the point of clip, the supply voltage will increase linearly (Class-G Amplifier). The following is a schematic of the reference IC TDA7294 datasheet which changed the value of the part so that it is easy to find the components. In the final stepper transistor section, you can use the TIP3055 / 2955, 2SC2922 / 1943, etc.

TDA7294 + Stepper High Efficient Amplifier

To facilitate assembly, elcircuit also provides a PCB file in the form of a Gerber file as shown below. The power in this TDA7294 + stepper amplifier circuit can produce up to 180W. Low Voltage supply 12VAC-25VAC Higher voltage supply 32VAC-45VAC.

PCB TDA7294 + Stepper High Efficient Amplifier


SCHEMATIC Stereo TDA7294 + Stepper High Efficient Amplifier 

GERBER Stereo TDA7294 + Stepper High Efficient Amplifier

Tuesday, January 26, 2021

1000W Inverter 12/24VDC to 220VAC with EGS002 High Frequency Transformer

This type of inverter has a high power efficiency of up to 95%, meaning that the power issued by the battery to the output power at 220v ac will be distributed 95% with relatively low power usage at a certain inverter capacity so that it can save battery power if you have a sufficient battery system, slightly different from the low-frequency inverter EGS002. In most cases the damage to the inverter is more of a high-frequency type or switching inverter because there are many in the market and a wide price range so that it can be found at competitive prices, most cases are damage to the H-Bridge MOSFET which meets directly with a 220v load, different from low type inverters frequency using a transformer, to build a high-frequency type inverter with good quality and durability requires more supporting components in order to get good quality on the inverter

I have made a high-frequency transformer version of the inverter, with an input voltage of 24VDC which you can see in the preview schematic below, to see more details you can download the PDF version of the schematic.

1000W Inverter 12/24VDC to 220VAC with EGS002 High Freq

And to make it easier to build this inverter, I have designed the PCB Layout Inverter EGS002 High-Frequency transformer version, which you can see in the PCB layout preview below.

PCB Layout 1000W Inverter 12/24VDC to 220VAC with EGS002 High Freq
The PCB is fixed, I added several features such as Over Current Protection,  Automatic switch, Remote Switch, Under Voltage Protection, Under Voltage Warning (Beeper), Fan Control by thermal sensing. You can download PCB with Gerber format, and you can order at PCB Fabricate online like JLCPCB.

And the following is a video of the assembly, along with testing this EGS002 High Freq Inverter. This inverter can produce up to 1000W- 2000W depending on the input voltage, the greater the current capacity of the battery, the greater the power output.

In the video, I use the FDP054N10 MOSFET for the DC STEP UP part and the W20N50 MOSFET for the SPWM EGS002 section.

The selection of the MOSFET greatly affects the power output as well as the shape of the sine wave. For components such as resistors, capacitors, and others, use quality components, install the values as stated on the PCB label or download the part list below.

The PCB is working normally 100%


Friday, January 22, 2021

DIY 1000W Inverter 12V /24V DC to 220VAC with EGS002 (low power frequency transformer)

Egs002 is a Board Module for building pure sine wave inverters, this module uses the eg8010 microcontroller ic as a sine wave generator, this ic is used in many manufacturers of pure sine wave inverters which are quite popular. with inverter power ranging from 300w to over 10,000 watts net, with this module we can build Pure Sine Wave inverters at low prices with the same wave output. The schematic Inverter 12V /24V DC to 220VAC with EGS002 (low power frequency transformer) same as the video in this post:
DIY Inverter 12V /24V DC to 220VAC with EGS002 (low power frequency transformer)
 The Low-Frequency EGS002 Inverter  has the following advantages:

-The circuit is compact, does not require a High Volt DC circuit like the High Freq type inverter

-Durable/durable in shock loads, especially induction loads (dynamo/motor) because the dynamo starting current/initial current is very high applied to the inverter will be resistant to the first transformer not directly to the MOSFET, in contrast to high freq inverters which will receive direct starting load on the H-bridge MOSFET and there is a vulnerable level if the MOSFET power is smaller / weaker for high-freq type inverters.

-Resistant to high distortion/noise loads, the distortion load has a ripple voltage or very high voltage even though it is only microseconds/milliseconds above the voltage that the MOSFET can experience, but the high ripple voltage will be dampened on the transformer, so it is not directly experienced by MOSFET like the high freq inverter type without a good output filter.

The low freq inverter type has an efficiency range of 70-85% or wider than the high-freq inverter type, which is 90-96%, but if the two inverters are loaded at peak load, the efficiency is almost the same in the 80-85% range.

PCB Layout for DIY 1000W Inverter 12V /24V DC to 220VAC with EGS002 (low power frequency transformer)

DIY Inverter 12V /24V DC to 220VAC with EGS002 (low power frequency transformer)

Video Assembling and Test DIY 1000W Inverter 12V /24V DC to 220VAC with EGS002 (low power frequency transformer)

Download File:

Thursday, December 31, 2020




 Audio/Video Amplifiers & Receivers

Pro-audio Amplifiers

Automobile Power Amplifiers

Subwoofer Amplifiers


Class-T architecture

Proprietary Digital Power Processing technology

“Audiophile” Sound Quality

0.02% THD+N @ 50W, 8Ω ¾ 0.03% IHF-IM @ 30W, 8Ω ¾ High Efficiency ¾ 95% @ 150W @ 8Ω ¾ 90% @ 275W @ 4Ω ¾ Supports wide range of output power levels ¾ Up to 300W/channel (4Ω), single-ended outputs ¾ Up to 1000W (4Ω), bridged outputs ¾ Output over-current protection ¾ Over- and under-voltage protection ¾ Thermally Enhanced 48-pin DIP (dual-inline package)

Schematic Power Amplifier Class-T TA3020:

PCB Layout Design Stereo Class T TA3020:
Class-T TA3020

Download Schematic & PCB Layout with Gerber file format:

The PCB Layout and Schematic include DC Protection and V5 regulatedpower supply with LM2596.