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Simple Audio Amplifier : 5 Steps - Instructables
https://www.instructables.com/Simple-audio-amplifier/
Simple Audio Amplifier: In most cases first project in electronics for beginners is building simple audio amplifier. That is because it requires small number of elements and not a lot of knowledge to build one. For low power amplifiers we could use integrated circuits lik…
Small Audio Power Amplifier Using Op-Amp and Two ...
https://www.deeptronic.com/electronic-circuit-design/small-audio-power-amplifier-using-op-amp-and-two-transistors/
Almost any type of op-amp capable of delivering 1-5 mA current can be used for this circuit. Most of any small transistors with maximum collector current handling around 100-200 mA can be used. The resistors R1 and R2 should be selected to supply the biasing point at 0.5Vcc, chose as high as possible but keep below 1/10 of op-amp’s input impedance.
Audio Amplifier Circuit
https://web.ece.ucsb.edu/Faculty/rodwell/Classes/ece2c/labs/Lab%201a%20-%202C%202007.pdf
LM358 op-amp, which is a low-power device that can be operated from a single voltage supply, therefore appropriate for battery-operated circuits. Low-power op-amps draw very little quiescent current and hence help prolong the life of the battery. The LM358 is a
Simple Op-Amp-based Headphone Amplifiers
http://www.beigebag.com/case_headamp1.htm
Simple Op-Amp-based Headphone Amplifiers. Op-amps are the obvious solution, but which ones. While many op-amps could be pressed into service, a few stand out as good candidates, for example the AD822 for low-voltage power supplies is a good choice, although it will not meet our 100mA peak output current specification.
Audio Amplifiers - techlib.com
http://techlib.com/electronics/audioamps.html
White Noise Source Computer Audio Booster. Here is a simple amplifier for boosting the audio level from low-power sound cards or other... 4-Transistor Amplifier for Small Speaker Applications. The circuit above shows a 4-transistor utility amplifier suitable... Op-Amp Audio Amplifier. The above ...
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