Schematics
Power Amplifier
Preamplifier
Audio mixer
Audio Equalizer
DC Protection
Headphone Amplifier
Vu Meter
Tube amplifier
Loudspeakers Active crossover
Audio Filter
Audio misc
Auto - car
FM transmitter
LED
Alarm
Power Supply
Motor control
Robot
Timer generator oscilator
Computer
Microcontroller programmer PIC AT
Digital
Light controller
Laser
RF transmitter receiver
IR infrared
Medicine
Meter Tester
Video
Switch control
Solar
RC modeling
Musical instruments
Miscellaneous
Game
Data acquisition
Telephone
Audio Preamplifier with Digital Volume
High-End Modular audio preamplifier
Stereo Preamp schematic with elect. adjustment Volume-Balance-Treble-Bass
Stereo Preamp schematic with Bass-boost
Amplifier of acoustic frequencies with preamplifier
Audio Line High-End Preamplifier with ICs
Audio Peak Indicator (overload)
Auto Fade for Audio signals
Class A Buffer preamplifier module
Class A preamplifier module with IC
Digital volume control
Digital Volume Control
Electronic Balance Input to Electronic Balance output
Electronic Balance input with Gain and Volume
Electronics attenuator
Hi-Fi RIAA Phono Preamplifier for moving magnet cartridge [1]
Hi-Fi RIAA Phono Preamplifier for moving magnet cartridge [2]
Line level signal to microphone input adapter
Low impedance microphone amplifier
Low Noise Balanced Microphone Preamp
Low Noise Microphone Preamplifier
Magnetic cartridge amplifier
Minimalist Discrete Hi-Fi Preamp
Module 1 Line amplifier in Class A
Module 2 Line amplifier in Class A
Module 3 Low Input Impedance-for Moving Coil Cartridge
Moving Coil Head pre-preamplifier [1]
Phono Preamplifier
Portable Microphone Preamplifier
Remove common signal from Stereo sound
Speech filter- Band pass (300HZ to 3KHZ) t
Symmetrical Audio Class A preamplifier [3]
Symmetrical class A Line amplifier 1
Symmetrical class A Line amplifier 2
Variable High-Pass 20HZ to 200HZ Filter
RIAA Phono Preamplifier
RIAA compensated stereo preamp
Preamplifier development
Phono preamplifier
Phono PreAmp High-end Phono (RIAA) Amplifier
Phono preamp (valve)
Microphone preamplifier
Microphone preamplifier circuits
Microphone preamplifier circuit
Microphone Circuit
Low Noise, High Gain Microphone Amplifier