20W Audio Amplifier using LM1875
https://www.electronics-lab.com/project/20w-audio-amplifier-using-lm1875/
20W Audio Amplifier kit is based on LM1875 IC. Specifications Power supply – 48 VDC Output – 20 W, 4 Ω Very low distortion (THD – 0.015%), good channel separation and ripple rejection IC built-in thermal, short circuit protections Internal output protection diodes Terminal pins for connecting input Power Battery Terminal (PBT) for easy power […]
20W Bridge Audio Amplifier
https://www.electronics-lab.com/project/20w-bridge-audio-amplifier/
Description 20W Bridge Audio Amplifier project, based on the TDA2005 IC, The TDA 2005 IC is class B dual audio amplifier, specifically designed for car radio applications etc. Specifications: Power supply input : 18 VDC Output power : 20 W, 4 Ω IC built in Thermal Shut-down, Load dump voltage surge protected Terminal pins for […]
Stereo tape head preamplifier using LA3161
https://www.electronics-lab.com/project/stereo-tape-head-preamplifier-using-la3161/
The Stereo Tape Head Preamplifier kit is based on LA3161 IC from SANYO. Specifications Power supply – 9 ~ 12 VDC @ 20 mA Output power – upto 200 mW Input Resistance – 100 KΩ (Typ), Load Resistance – 10 KΩ (Typ) Low noise, good ripple rejection owing to the on-chip voltage regulator Berg pins […]
Tiny audio amplifier using LM386
https://www.electronics-lab.com/project/tiny-audio-amplifier-using-lm386/
The Tiny Audio Amplifier kit is a good choice for battery operation. It is based on LM386 IC. Specifications Power supply – 6 – 12 VDC Output power – 1 W, 8 Ohm The quiescent power drain is only 24 mW when operating from 6 VDC Self-centering output quiescent voltage Onboard PRESET to adjust […]
5000W Ultra Light – High Power Amplifier
https://www.electronics-lab.com/project/5000w-ultra-light-high-power-amplifier/
This circuit is of an 2x 2,500W RMS stereo amplifier, super-light and without switching-mode power supply. The circuit just shows a channel, and the power supply that it assists to the two channels. The audio circuit should be duplicated, but the power supply assists to the two channels without problems. A special care should be […]
2N3055 Power Amplifier
https://www.electronics-lab.com/project/2n3055-power-amplifier/
Simple and low cost. The optimal supply voltage is around 50V, but this amp work from 30 to 60V. The maximal input voltage is around 0.8 – 1V. As you can see, in this design the components have a big tolerance, so you can build it almost of the components, which you find at […]
Motorola Hi-Fi power amplifier
https://www.electronics-lab.com/project/motorola-hi-fi-power-amplifier/
This is a very simple, low cost, Hi-Fi quality power amplifier. You can build it 5 ways, like its shown in the table (from 20 W to 80 W RMS). Comments The first thing that you must do, is to measure the end transistors (T3 and T4) amplifying coefficient, the hfe or β. If […]
Amplifier of Acoustic Frequencies with Preamplifier
https://www.electronics-lab.com/project/amplifier-of-acoustic-frequencies-with-preamplifier/
Characteristics Input Voltage: 15V Output Power: 4,2Wrms @ 4Ohm Minimal input signal: 94mVp-p with preamplifier, 0,65Vp-p without the preamplifier Parts R1 2,2K R2 330K R3 4,7K – logarithmic potentiometer R4 330K R5 1K R6 1.5Ohm C1, C6 100nF polyester C2 100uF/25V electrolytic C3, C7 1uF/25V electrolytic C4 1000uF/25V electrolytic C5 10uF/25V electrolytic Q1 BC547 U1 TDA2002 LS1 speaker […]
Sound Level Meter
https://www.electronics-lab.com/project/sound-level-meter-2/
This nifty sound level meter is a perfect one-chip replacement for the standard analog meters. It is a completely solid state and will never wear out. The whole circuit is based on the LM3915 audio-level IC and uses only a few external components. Parts Notes V+ can be anywhere from 3V to 20V The input […]
FET Audio Mixer
https://www.electronics-lab.com/project/fet-audio-mixer-3/
This simple circuit mixes two or more channels into one channel (eg. stereo into mono). The circuit can mix as many or as few channels as you like and consumes very little power. The mixer is shown with two inputs, but you can add as many as you want by just duplicating the “sections” which […]