This circuit is a simple digital volume control. The integrated circuit DS1669 is the one that increases or reduces the volume by means of two push buttons.
With this circuit we recompense the human ear deficiency to perceive less sharp and less deep tones of those that a melody really has at low volume.
We present you a retro assembly. This circuit was absolutely necessary years ago for us to listen to our vinyl discs. We all know what a preamplifier is, but what about R.I.A.A? R.I.A.A is a “Recording Industry Association of America”.
This circuit is made to protect the speakers from the "pump" inconvenience, that is produced in some amplifiers while they are on.
This simple circuit is based on the well-known integrated circuit LM3915.
The LM386 is a power amplifier designed for use in low voltage consummer applications.
This amplifier is especially suited for use in 3V micro cassette recorder, mini cassette recorder, headphone stereo applications.
Single channel power amplifier with excellent audio quality. Applications in portable radios, tv sets, cassette recorders, interphones, and wireless tranceivers.
The LM4861 is a bridge-cennected audio power amplifier capable of delivering 1.1W continuous average power to an 8 ohm load with 1% THD+N using a 5V power supply.
2x10W amplifier LA4280.
2x18W amplifier TA8205.
2x30W amplifier TA8220. rn