Showing posts with label Amplifier. Show all posts
Showing posts with label Amplifier. Show all posts

Monday, September 6, 2021

1W Amplifier for Stereo Headphone using TDA2822 IC + PCB

Amplifier , Circuits to Assemble
1W Amplifier for Stereo Headphone using TDA2822 IC + PCB

Fig. 3 - PCB - 1W Amplifier for Stereo Headphone with IC TDA2822M

Simple headphone amplifier with few external components that is easy and inexpensive to assemble. This IC is designed for amplifying portable devices such as CD players, portable radios, small speakers, etc.

First of all, we will use it to amplify the audio signal for headphones, that is, we will build a headphone amplifier, whether to listen to music from a mobile phone, connect instruments to study, such as electric guitar, bass guitar, ukulele, guitar, or any other audio signal that needs to be amplified. 

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The main component is the TDA2822, a monolithic integrated circuit in an 8-pin lead  Mini-dip package. It is intended for use as a dual audio power amplifier in portable audios.

FEATURES

  • Dual Low-voltage power amplifier 
  • Supply voltage down to 1.8V 
  • Low crossover distortion                                
  • Low quiescent current z Bridge or stereo configuration
The maximum input voltage of this IC is 15V DC, so do not apply more than 15V to the IC. The circuit volume can be adjusted using a 47K doble potentiometer is used in the circuit.

The schematic diagram circuit of the 1W audio Amplifier for Stereo Headphone with IC TDA2822M  is shown in Figure 2 below.

Fig. 2 - 1W Amplifier for Stereo Headphone with IC TDA2822M

Material List

  • IC1 .................. Integrated Circuits TDA2822M
  • R1, R2 ............ 1/4W / 4.7Ω Resistor 
  • C1, C2 ............ 1uF - 25V Electrolytic capacitor 
  • C3, C4, C5 ..... 100uF - 25V Electrolytic Capacitor 
  • C6, C7 ............ 0.1uF Polyester capacitor
  • J1, J2 .............. 3.5mm Audio Female Jack Connector 
  • VR1 ................ 47KΩ  Double Potentiometer
  • P1 ................... Connector 2 screw terminal 5mm 2 Pins
  • Others ............ Wires, Solders, pcb, etc.

We offer for download the necessary materials for those who want to assemble with PCI - Printed Circuit Board, the files in PNG, PDF and GERBER files for those who want to send for printing.

Download:


If you have any questions, suggestions or corrections, please leave them in the comments and we will answer them soon.

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Monday, June 21, 2021

68W Hi-Fi Audio Power Amplifier using LM3886T IC + PCB

Amplifier , Circuits to Assemble
68W Hi-Fi Audio Power Amplifier using LM3886T IC + PCB
Fig. 1 - PCB  68W Hi-Fi Audio Power Amplifier - IC LM3886T

The LM3886 is a high-performance audio power amplifier capable of delivering 68W of continuous average power to a 4Ω load and 38W into 8Ω with 0.1% THD+N from 20Hz–20kHz. 

The performance of the LM3886, utilizing its Self Peak Instantaneous Temperature (°Ke) (SPiKe) protection circuitry, puts it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area (SOA). 

SPiKe protection means that these parts are completely safeguarded at the output against over-voltage, under-voltage, over-loads, including shorts to the supplies, thermal runaway, and instantaneous temperature peaks. The IC pinout is shown in Figure 2 below.
Fig. 2 - Pinout IC LM3886T

The LM3886 maintains an excellent signal-to-noise ratio of greater than 92dB with a typical low noise floor of 2.0μV. It exhibits extremely low THD+N values of 0.03% at the rated output into the rated load over the audio spectrum, and provides exceptional linearity with an IMD (SMPTE) typical rating of 0.004%.

Features

  • 68W cont. avg. output power into 4Ω at VCC = ±28V
  • 50W cont. avg. output power into 8Ω at VCC = ±35V
  • 38W cont. avg. output power into 8Ω at VCC = ±28V
  • 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 when |VEE| + |VCC| ≤ 12V, thus Eliminating Turn-On and Turn-Off Transients
  • 11-Lead TO-220 Package

The Power Supply

The power supply is Symmetrical, for those who will use a 4Ω Loudspeaker, the 2x 20Vac transformer is recommended, because when rectified, it is around 28Vdc.

And for those who will use it at 8Ω, it is recommended the 2x 25Vac transformer, which when rectified, is 35Vdc on average.

The recommended transformer power is about 120W, this means that the transformer current is on average 3.5 Amperes, for mono, if it's stereo, do the duplication, that is, 8 Amperes. 

A good size heat radiator is necessary, since the IC LM3886 works in class AB, there is a great loss in heat at full power, and the recommended filter capacitors is 2 x 10.000uF/50V

The output inductance is formed by 15 turns of enameled wire, with a diameter of approximately 0.5mm, wound around the resistor R8 of 10Ω 1W. The complete schematic diagram is shown in Figure 3 below.
Fig. 3 - Schematic  68W Hi-Fi Audio Power Amplifier - IC LM3886T

Components List

  • U1 ..........................LM3886 Integrated Circuit
  • R1, R3 .................. 2.2K ohms - 1/8W - Resistor  - (red, red, red, gold)
  • R2, R4, R5, R6 ..... 47K ohms - 1/8W - Resistor  - (yellow, violet, orange, gold)
  • R7 ......................... 4R7 ohms - 1W - Resistor  - (yellow, violet, gold, gold)
  • R8 ......................... 10 ohms - 1W - Resistor  - (brown, black, brown, gold)
  • C1 ......................... 2.2uF - 25V - Electrolytic capacitor 
  • C2 ......................... 680pF Polyester capacitor 
  • C3 ......................... 470uF - 50V - Electrolytic capacitor 
  • C4, C8 .................. 100nF - ceramic/polyester capacitor
  • C5, C7 .................. 1000uF - 50V - Electrolytic capacitor
  • C6 ......................... 47pF - ceramic/polyester capacitor
  • C9 ......................... 220nF - ceramic/polyester capacitor
  • C10 ....................... 100uF - 50V - Electrolytic capacitor
  •  L1 ........................ 0.7uH Inductor - *See Text 
  • P1, P2 ................... Block 5mm 2 Pin weldable terminal Connector
  • P3 ......................... Block 5mm 3 Pin weldable terminal Connector
  • Others ................... PCP,  Heat Sink, Wires, Solders and Etc.

We are offering the PCI - Printed Circuit Board, in GERBER, PDF and PNG files, for you who want to do the most optimized assembly, either at home.

If you prefer in a company that develops the board, you can is downloading and make the files in the Download option below.

Files to download, Direct Link:

Click on the link beside: GERBER, PDF and PNG files

If you have any questions, suggestions or corrections, please leave them in the comments and we will answer them soon.

Subscribe to our blog!!! Click here - elcircuits.com!!!

My Best Regards!!!

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Monday, May 24, 2021

Simple 100W Power Amplifier using TIP142 NPN and TIP147 PNP transistors + PCB

Amplifier , Circuits to Assemble
Simple 100W Power Amplifier using TIP142 NPN and TIP147 PNP transistors + PCB
Fig 1 - PCB 100W Power Amplifier - TIP142 and TIP147 Transistors

This is a low complexity amplifier, which can be easily assembled by anyone who has basic knowledge in electronics.

This amplifier works with a Class B output stage with a complementary output pair formed by the TIP142 and TIP147 Darlington Transistors.

Operation

The input stage, is formed by a differential pair Q1 and Q2, which are two PNPs A733 transistors, the Q1 transistor receive the input signal for amplification, and Q2 receives the Feedback signal.

Thus assembling a signal loop making with the differential amplifier to control the signal giving stability to the amplifier and avoiding distortion in the circuit.

The second stage consists of a TIP41 transistor, which functions as a Drive, which receives the signal from the differential pair and amplifies it to delivery a sufficient current at the base of the output transistors.
This amplifier has an output power of approximately 100 watts, to get this output power will depend on the Power Supply voltage, with a supply voltage of + 50V / - 50V, with a current of 3A.

In our tests, it was possible to get a little more than 100W. The schematic diagram circuit, is in Figure 2 below, it is a very simple circuit to build, with few external components.

However, be careful, it works with a total voltage of 90V, be careful not to change any component polarity, don't short the amplifier circuit.
Fig 2 - Schematic Simple 100W Power Amplifier with  TIP142 NPN and TIP147 PNP transistors

Power supply

The power supply for this circuit amplifier is symmetrical, in our tests a Transformer with a +36V 0V -36V AC, center-tape was used, with a current 3 Amperes, after the CA voltage goes through the rectification, it will average 50V DC.

Components List

  • Semiconductor 
    • Q1, Q2 .... A733 - PNP transistor 
    • Q3 ........... TIP41C - NPN transistor
    • Q4 ........... TIP142 - NPN power transistor 
    • Q5 ............TIP147 - PNP power transistor 
    • D1, D2 .... 1N4007 - Diode 

  • Resistors 
    • R1, R2 ..... 22K ohms - 1/8W - Resistor  - (red, red, orange, gold)
    • R3 ........... 1K5 ohms - 1/8W - Resistor  - (brown, green, red, gold)
    • R4 ........... 220 ohms - 1/8W - Resistor  - (red, red, brown, gold)
    • R5 ........... 27K ohms - 1/8W - Resistor  - (red, violet, orange, gold)
    • R6 ........... 27 ohms - 1/8W - Resistor  - (red, violet, black, gold)
    • R7, R8 .... 3K3 ohms - 1W - Resistor  - (orange, orange, red, gold)
    • R9, R10 ... 022 ohms - 3W - Resistor  - (red, red, gold, silver)

  • Capacitors
    • C1 .......... 2.2uF - 25V - Electrolytic capacitor 
    • C2 .......... 100uF - 63V - Electrolytic capacitor 
    • C3 .......... 10uF - 63V - Electrolytic capacitor

  • Miscellaneous 
    • P1, P2 ..... Block 5mm 2 Pin weldable terminal Connector
    • P3 ........... Block 5mm 3 Pin weldable terminal Connector
    • Others .... Printed Circuit Board, Wires, Solders, Etc.

We are offering the PCI - Printed Circuit Board, in GERBER, PDF and PNG files, for you who want to do the most optimized assembly, either at home.

If you prefer in a company that develops the board, you can is downloading and make the files in the Download option below.

Files to download, Direct Link:

Click on the link beside: GERBER, PDF and PNG files

If you have any questions, suggestions or corrections, please leave them in the comments and we will answer them soon.

Subscribe to our blog!!! Click here - elcircuits.com!!!

My Best Regards!!!

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Friday, May 21, 2021

200W RMS Power Amplifier using 2SC2500 AND 2SA1943 transistors + PCB

Amplifier , Circuits to Assemble
200W RMS Power Amplifier using 2SC2500 AND 2SA1943 transistors + PCB
Fig. 1 - 200W RMS Power Amplifier using 2SC2500 AND 2SA1943 transistors


This Power Amplifier have a moderate sound quality, and it's a simple circuit to assemble, using 4 complementary output transistors, 2 x NPN 2SC2500 and 2 x PNP 2SA1943. 

This amplifier is quite common to find and it has a good sound quality, uses specific power transistors for audio, making these amplifiers a good circuit amplifier to building.


This is a power amplifier, posted by our partner fvml.com.br, we are authorized to replicate any post, so we took these posts from them and implemented the volume control and changed the layout a little. This partnership allows us to do this, and they are also free to repost our posts.

The circuit is supplied with a symmetrical power supply and can be supplied with a voltage between 30V to 65V, for greater performance you must use the 60V, with at least current 4 Amperes.

The schematic diagram is shown in Figure 2 below, it is a simple amplifier, and often found on the internet for sale, it has a good quality and complies with the promised power.
Fig. 2 - 200W RMS Power Amplifier with 2SC2500 and 2SA1943

Power supply

The power supply for this circuit amplifier is symmetrical, in our tests a Transformer with a 42V - 0 - 42V center-tape was used, with a 5 Amperes current, you can use a lower current, up to 4 Amps minimum, which will play perfectly.

Nothing prevents you from using a lower voltage, as this amplifier has a tolerance regarding its supply voltage, and can normally play "with loss in output power" with voltages ranging from 24V to 60V without too many problems.

Components List

  • Q1, Q2, Q3 .................. A1015 - PNP transistor 
  • Q5, Q6 ......................... TIP41C - NPN transistor
  • Q4, Q7 ......................... TIP42C- PNP transistor
  • Q8, Q10 ....................... 2SC5200 - NPN power transistor 
  • Q9, Q11 ....................... 2SA1943 - PNP power transistor 
  • D1, D2, D3, D4, D5 .... 1N4007 - Diode 
  • P1 ................................ 47K - Potentiometer 
  • C1 ............................... 2.2uF - 25V - Electrolytic capacitor 
  • C2 ............................... 47uF - 63V - Electrolytic capacitor 
  • C3 ............................... 330pF - Ceramic / polyester capacitor 
  • C4 ............................... 100nF ceramic / polyester capacitor
  • R1 ............................... 10K ohms - 1 / 4W - Resistor  - (brown, black, orange)
  • R2 ............................... 18k ohms - 1 / 4W - Resistor  - (brown, gray, orange)
  • R3 ............................... 820 ohms - 1 / 4W - Resistor  - (gray, red, brown)
  • R4 ............................... 270 ohms - 1W - Resistor  - (red, violet, brown)
  • R5 ............................... 1K ohms - 1 / 4W - Resistor  - (brown, black, red)
  • R6 ............................... 18K ohms - 1 / 4W - Resistor  - (brown, gray, orange)
  • R7 ............................... 330 ohms - 1 / 4W - Resistor  - (orange, orange, brown)
  • R8 ............................... 56 ohms - 1W - Resistor  - (green, blue, black)
  • R9 ............................... 27 ohms - 1W - Resistor  - (red, violet, black)
  • R10, R11 .................... 6R8 ohms - 1W - Resistor - (blue, gray, gold)
  • R12, R13 .................... 100 ohms - 1W - Resistor  - (brown, black, brown)
  • R14, R15, R16, R17 ... 033 ohms - 5W - Resistor  - (orange, orange, gold)
  • R18, R19 .................... 10 ohm resistor - 1W - (brown, black, black)
  • B1, B2 ........................ WJ2EDGVC-5.08-2P Connector
  • B3 ............................... WJ2EDGVC-5.08-3P connector
  • L1 ............................... Coil - 5uH Air Core
  • Others ......................... Printed Circuit Board, Wires, Solders and Etc.

We are offering the PCB - Printed Circuit Board, in GERBER, PDF and PNG files, for you who want to do the most optimized assembly, either at home.

If you prefer in a company that develops the board, you can is downloading and make the files in the Download option below.

Files to download, Direct Link:

Click on the link beside: GERBER, PDF and PNG files

If you have any questions, suggestions or corrections, please leave them in the comments and we will answer them soon.

Subscribe to our blog!!! Click here - elcircuits.com!!!

My Best Regards!!!

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Wednesday, May 19, 2021

40W Stereo 14.4V Car Audio Power Amplifier using TDA8560Q IC + PCB

Amplifier , Circuits to Assemble
40W Stereo 14.4V Car Audio Power Amplifier using TDA8560Q IC + PCB
Fig. 1 - PCB 40W Stereo Car Amplifier TDA8560Q

For Portuguese Version, Click Here!

This is a super easy to build Stereo Car Audio Power Amplifier circuit, due to the number of external components being few, it makes this amplifier quite viable for those who want to build a power amplifier and super simple and quick to do.

The TDA8560Q is an integrated Class-B output amplifier in a 13-lead Single-In-Line (SIL) power package.

This Car Audio Amplifier Circuit gives an output power 2×40W / 2 Ω in BTL configuration. The device is primarily developed for car radio applications.  

The TDA8560Q contains two identical amplifiers and can be used for bridge applications. The gain of each amplifier is fixed at 40 dB. Special features of the device are as follows.

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Mode select switch (pin 11)

  • Standby: low supply current (<100 µA)
  • Mute: input signal suppressed
  • Operating: normal on condition.

Since this pin has a very low input current (<40 µA), a low cost supply switch can be applied. To avoid switch-on plops, it is advised to keep the amplifier in the mute mode during ≥100 ms (charging of the input capacitors at pin 1 and pin 13).

The schematic diagram of the Car Amplifier Circuit, is in Figure 2 below, it is a very simple circuit to build, with few external components, however, it is a very powerful circuit, which provides 80W in two 2 Ohms Speakers.

Fig. 2 - 40W Stereo 14.4V Car Audio Power Amplifier - IC TDA8560Q

The operating voltage of this circuit can vary between 6V to 18V DC, which opens the possibilities of use in amplifier for; Residential Sound, Car Stereo, Boombox, Computer Speaker, among other types of portable audio amplifiers ... Since it has a common power supply and low power voltage, this circuit amplifier is ideal for these purposes.

Components List

  • U1 ..................TDA8560Q Integrated Circuit
  • R1, R2, R3 .... 10K ohms - 1/8 W Resistor - (brown, black, orange, gold)
  • C1, C2 ........... 470nF Polyester Capacitor
  • C3 .................. 47uF - 35V Electrolytic capacitor 
  • C4 .................. 2200uF - 35V Electrolytic capacitor
  • C5 .................. 100nF Ceramic Capacitor
  • RP1, RP2 ....... 20K ohms Potentiometer 
  • JP1, JP2 .......... Female RCA Connectors to PCB
  • P1, P2, P3 ....... PCB Terminal Blocks
  • Others ............. Wires, Welds, Posts, PCB, Etc.

We are making available the files containing the PCB, the Schematic Diagram, the PDF, GERBER, and JPG, and providing a direct link to download for free in a direct link, "MEGA".

Direct link to download

Click in the link  to download the Files: PCB Layout, PDF, GERBER, JPG

If you have any questions, suggestions or corrections, please leave them in the comments and we will answer them soon.

Subscribe to our blog!!! Click here - elcircuits.com!!!

My Best Regards!!!

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