LM1875 | 20 Watt Audio Power Amplifier

20 Watts Power Amplifier circuit can be made with an IC power amplifier LM1875. IC LM1875 is a single chip power amplifier from National. 20 watts audio amplifier with LM1875 is a low power amplifier with good quality to the room.

To assemble the amplifier 20 watts with IC LM1875 component is not needed much support. 20 watts power amplifier using LM1875 IC in this article using symmetrical power supply. The series of 20 watts audio power amplifier with IC LM1875 can be used as an experiment or first project for the reader, because it is simple and assembly of high success.

Schematic Amplifier LM1875

LM1875 amplifier circuit with the above may result in the strengthening of the voltage up to 27dB for each channel (1 channel 1 IC). Strengthening the voltage can be changed by changing the feedback that is R5 R (on the circuit above using R 22K). But the tension reinforcement can not be less than 20 dB because it can cause oscillation. For the power supply or power supply 20 watts power amplifier rngakaian with lm1875 can use travo 2-3A with CT.

2 X 0.6W schematic audio amplifierThis schematic have require minimum voltage at 1Volt and maximum volotage at 9 Volt. Maximum output … Read More...
50W audio amplifier with IC'sThe above amplifier circuit based on IC is STK075G, and another equation that is STK084G, STK085, ST… Read More...
Subwoofer amplifier schematic diagramAmplifier circuit is very suitable for use in subwoofer speaker, because its strong. This circuit us… Read More...
20W Surround audio amplifier with SI-1020GHave you been use the IC above? if those who have not, IC above is used or applied to the audio powe… Read More...
Stereo STK013 audio amplifier circuitOn the amplifier circuit using ic STK, the same as my previous posting. However, in the above circui… Read More...
2,5 Watt audio amplifier circuit diagramThe above is a simple amplifier circuit also has a minimal power output. By using only a few compone… Read More...
70W STK amplifier schematicFor this amplifier circuit using three voltage plus, min, and the ground. with a maximum voltage app… Read More...
0,15Watt amplifier schematicAmplifier circuit is also very suitable when used in fm radio receiver. Supply voltage required 8 - … Read More...
60W ICs amplifier with OM961Amplifier circuit is very suitable for use in car audio speakers that use a subwoofer, with a power … Read More...
6 - 12 Volt audio amplifier circuitsThe above is an amplifier circuit using supply voltages from 6 volts DC to 12 Volt DC. Power output … Read More...
150W amplifier with active crossoverSeries 150W Amplifier With Active Crossover Series 150W Amplifier with Active Crossover is very inte… Read More...
50W car audio amplifier schematic circuitsCar power amplifier uses SI1050GL IC as the main amplifier. The output power 50 Watt 8 ohm mono impe… Read More...
2 X 40 Watt STK amplifierComponents of the above is one component of ic which is applied as a reinforcement. Power amplifier … Read More...
2W PA246 amplifier circuitThis amplifier output circuit having a fairly low at only 2W 8 ohm impedance. Minimum supply voltage… Read More...
140W audio amplifier with IC STK070By using the above amplifier circuit you can hear the sound quality is quite good by a high output p… Read More...
TDA2004 stereo bridge audio amplifierMost of the lovers, especially in audio electronics, it will never escape from this one component of… Read More...
Mini and simple power amplifier circuitsWhat is the meaning of the picture above? The above picture is a miniature audio amplifier and very … Read More...
Subwoofer amplifier with 30W output powerAmplifier circuit is very suitable for use in subwoofer amplifier system based on IC SI1030G. Amplfi… Read More...
2 X 30Watt home amplifier circuitAudio amplifier circuit is very suitable for use at home, using a subwoofer speaker, or woofer speak… Read More...
2 x 2,3 Watts power amplifier schematicsDo not misunderstand, this series is one of several series of power amplifiers that have output / lo… Read More...