- Electronics Projects
- 1.5v to 220v AC simple inverter
- Build Simple AM Radio receiver at home
- Simple Uninterruptible Power Supply (UPS) Circuits
- Single Transistor Amplifier Circuit
- 3.7v Lithium Battery Level Indicator
- LED Chaser using transistors
- Electronics Projects for Beginners
- Simple Latch Circuit Using Transistors
- DC to AC Power Converter circuit feature working
- Fire Alarm Circuit using Transistor
- Two Transistor Amplifier
- Laser Security System
- Music Operating Dancing LEDs light
- Volts Booster Circuit Using Ferrite ore transformer
- Touch switch circuit using Transistor
- Two transistor FM transmitter project
- LED Flasher Using Timer IC 555
- DC Voltage Power Supply Using The LM317
- Electronic Mosquito Repellent Circuit
- Light Dimmer Circuit 1000 Watts Using BT139
- Non-Contact Voltage Detector by using transistor
- 4 volts simple inverter project: explanation
- Flashing Police Lights Circuit
- Light Dependent Resistor, its types and applications
- 100 watts inverter circuit working and applications
- Stereo Audio Amplifier 5W Circuit using TEA 2025 IC
- Small High Volts using 2Sc 1815 transistor
- Electronic Doorbell Circuit using a 555 and CD4017
- Touch On Touch Off Switch Circuit Using 555 timer
- LM386 Audio Amplifier Circuit
- IC 4440 Amplifier Circuit
- Neon Lamp Circuits Working and Application
- Low Power Audio Amplifier Using integrated circuit
- Voltage Regulator Circuits using Transistor and Zener Diode
- Water Level Indicator Circuit Using Transistor
- LED Chaser using CD4017 IC
- Motion Sensor Light Switch
- Melody Generator Using IC um66
- Water Level Indicator Using IC
- Led Light to 220v AC
- LiFi Data Transfer System, WiFi vs LiFi
- How to Connect a CAR Battery | Polarity Checker
- Voltage Level Indicator Circuit
- Security Alarm Using PIR Sensor
- Battery Level Indicator Using LM 3914
- Single Transistor FM Transmitter circuit
- Different types of Capacitor
- Light Emitting Diode (LED) Types of LEDs
- Different Types of Relays
- Piezo buzzer features equivalent
- Clap Switch : Circuit and Its Working
- Different Types of diode, working and features
- PC817 Optocoupler Pinout, Equivalent, Features and applications
Low Power Audio Amplifier Using integrated circuit
In this article, we are going to explain some Low Power Audio Amplifier. There is a multitude of low power Audio Amplifier Using IC (integrated circuits). I will show some quite common, easy-to-make, and generally low-cost. Most of these amplifiers are used by televisions, test and measurement equipment, old modems, etc.
Audio Amplifier Using integrated circuit
At present, there is talk of sound equipment of “10,000 Watts PMPO” or more. Then someone may think that a 20-watt amplifier per channel is low power when in fact it is not because here we talk about real power or RMS. You should know that PMPO is not a real electronic measure.
Low-power amplifier projects are 1W, 2W, or less than 10 watts.
2.5W Amplifier Using LM380N
First I will present the popular LM380, widely used in televisions, communication radios, measuring equipment, modem, etc.
This integrated circuit is very flexible for the voltage, according to the manufacturer works well from 10 to 22 volts, delivering a power of up to 2.5 watts. I use it in projects for 12 volts.
LM380 connection drawing:
LM386 <1W amplifier (low-power audio amplifier)
This amplifier is similar to the LM380 but is much less power, reaching 1 watt than the LM386N-4,
the operating voltage ranges from 4 to 12 volts (LM386N-1, LM386N-3, LM386M-1, LM386MM-1)
Or from 5 to 18 volts the LM386N-4.
Diagram of the amplifier with LM386:
The gain of this amplifier is adjusted between pins 1 and 8
disconnected approximately 26dB, and with an electrolytic capacitor between the tips up to 46 dB. (10uF, positive pin1)
LM386 connection drawing:
Most versions of the LM386 are of the order of 125 mW. Used quite a lot as an amplifier for hearing aids or as an output in error indicators, alert tones, and “buzzers”.
Audio Amplifier Using IC TDA7235
The TDA7235 is widely used in televisions, with a heat sink that can be used as a 4-watt amplifier.
The voltage is surprisingly flexible, it can be used from 1.8 volts to 24.
Connection drawing of the TDA7235:
2W TDA7267 integrated circuit (low-power audio amplifier)
The TDA7267 is specially designed for televisions, with the gain set at 32 dB. Although the voltage is not as flexible as the previous one, it can work from 4.5V to 18V. With pin 3 (SVR) grounded the integrated circuit is at rest (stand-by)
Connection drawing of the TDA7267:
Integrated circuit TDA2822M Stereo 8 Pin
This integrated circuit in addition to the versatility of the power supply (1.8V to 15V), is double (stereo). Being ideal for projects or portable applications, trying not to exceed 1 watt per channel.
Connection drawing of the TDA2822M: (audio amplifier using ic)
The UTC2822H amplifier, the D2822N, and the TDA2822M are exactly the same in connections and the only difference found is that the UTC2822H can only work from 1.8V to 6V, and supports a maximum of 9 volts. While the D2822N does work from 1.8V to 15V.
There is also the TDA2822 which is 16 pins. (audio amplifier using it)
TDA2822 16-pin integrated circuit (low-power audio amplifier)
This integrated circuit can be used from 3 to 15 Volts, it can handle a maximum of 4 watts
(2W x 2) with the heat sink.
The electronic features are similar to the 8-pin TDA2822M amplifier but used 3 volts.
Connection drawing of the 16-pin TDA2822:
Both for this amplifier TDA2822 and for all others we must take into account a good ground connection to avoid oscillations that could damage them or produce unwanted noise.
