DS

In this circuit requires only three components , namely IC TDA7052 , and 2 capacitor electrolyte. Actually , only with IC we are able to run this amplifier , but the sound less than the maximum. This amplifier circuit requires a minimum voltage of 3 volts and 15 volts maximum. Was 1 Watt power output with 4 Ohm impedance. See this circuit below : Just IC and 3 components we can make the circuit above.

Overview: AN12942B is an one-chip IC for the stereo speakers which can output 1 W by 8 Ω, headphone amplifiers, line amplifiers, and electronic volumes. The AGC circuit is built-in to prevent the resonance or the vibration by the speaker’s energy and the clipping distortion what is  called "broken up sound".  Also the AN12942B is built-in power saving on/off function automatically detecting input signal to save the power of speaker  amplifier. Circuit Diagram: Audio signal processing

The schematic above is amplifier based on ic TA7211P or TA7212P , circuit above using OT transformer as a booster amplifier again. The amplifier suitable used on outside / field, because by using a transformer OT is identical to the PA amplifier. Part List : R  = 1K , 10R , 3K3 C  = 1uF , 10uF , 1n , 68u, 3u3, 2n2 x 2, 100u  IC = TA 7211P / TA7212P Technical information : Max Vcc = 15 VDC Min Vcc  = 4 VDC Po            = 3,4 W Rl            = 8 Ohm Icco         = 16 mA

Project Description This is a very easy to build power supply that is based on LM338 5A adjustable voltage regulator. I am using the supply for a long time, have no problem yet. Only current adjust is missing but I overcome this situation by using an LCD panel ampermeter.  There is no PCB for the circuit. I took a 3x16 copper plate and strip the unused areas by a knife. If you want you can use analog meters instead of LCD panels.    Notes Use thick wires for connections.When connecting the LM338 to the heatsink use thermal paste. Use external supplies for LCD panels. They can be 9V batteries. The panels I use draws 1mA current and the batteries last sufficiently long time. If you have small transformers which can supply regulated 9V, you can use them. You need separate transformers for each panel!The transformer should be 100 Watt but if you don't need high current you can try transformers that you already have. (I can draw 6A from 100Watt transformer.)If you have...

In this circuit requires only three components , namely IC TDA7052 , and 2 capacitor electrolyte. Actually , only with IC we are able to run this amplifier , but the sound less than the maximum. This amplifier circuit requires a minimum voltage of 3 volts and 15 volts maximum. Was 1 Watt power output with 4 Ohm impedance. See this circuit below : Just IC and 3 components we can make the circuit above.

This is a one watt home stereo amplifier module project using the KA2209 IC from Samsung, which is equivalent to the TDA2822. It operates from 3-12V DC & will work from a battery since the dormant current drain is low. It requires no heat sink for normal use. The input & output are both ground referenced. Maximum output will be obtained with a 12V power supply & 8 ohm speaker, however it is suitable for driving headphones from a supply as low as 3V. The Specifications of the home stereo amplifier : D.C. input : 3 – 12 V at 200 – 500 mA max Idle current : approx. 10 mA Power output : > 1 Watt max. 4-8 ohms, 12V DC Freq. Resp. : approx. 40 Hz to 200 kHz, 8 ohm, G=10 THD : < 1 % @ 750 mW, 4-8 ohm, 12V Gain : approx. x10 (20 dB) OR x100 (40dB) S/N ratio : > 80 dB, G = 20 dB Sensitivity : < 300 mV, G = 20 dB Input Impedance : approx. 10 k ohm Description   The gain is adjustable from ten to 100, i.e. twenty to 40 dB. Start with feedback resistors R1 and R3 of 1k ...

TDA1009 circuit amplifier , this circuit is stereo amplifier and simple schematic .Minimum voltage require 9V and maximum voltage 24V. To avoid damaged IC please use supply voltage 12 volt and must be filtering voltage. Power output 2 X 18 W with impedance 4 Ohm.See circuit schematic and troubleshooting amplifier : Click to view larger  If circuit not working ,possible cause is on : Supply voltage. Components damaged , such as IC , resistor ,and Capacitor. Installation components inverted. Broken line PCB. Input not connected. Or input grounding. Output Not connected. Speakers damaged.

Circuit diagram: 30 W BTL audio power amplifier AN7164 Datasheet for AN7164: Download

Overview The STK412-000 series are class H audio power amplifier hybrid ICs that feature a built-in shift power supply circuit. These ICs provide high efficiency audio power amplification by controlling (switching) the supply voltage supplied to the power transistors according to the detected level of the input audio signal. Power Sourse of  Two-Channel Shift Power Supply Audio Power Amplifier ICs 180W + 180 W Circuit diagram and other info view