22 Watt Audio Amplifier electronic schema
Dec 7th
this 22 watt amp is easy to build, and very inexpensive. The circuit can be used as a booster in a car audio system, an amp for satellite speakers in a surround sound or home theater system, or as an amp for computer speakers. The circuit is quite compact and uses only about 60 watts.
circuit More >
Self-powered Sine to Square wave Converter Electronic Circuit
Aug 7th
It’s a Self-powered Sine to Square wave Converter Circuit. Converts sine to square waves without a power-source.Useful as a test instrument for audio purposes.
Electronic Circuits diagram for Self-powered Sine to Square wave Converter
Parts:
R1_____________1M 1/4W Resistor
R2___________100K Linear Potentiometer
C1,C2________100µF 25V Electrolytic Capacitors
C3____________10nF 63V Polyester Capacitor
D1,D2_______1N4148 75V 150mA Diodes
IC1___________4069 Hex More >
Precision Audio Millivoltmeter – Electronic circuit
Aug 6th
It’s a Precision Audio Millivoltmeter Electronic circuit. Measures 10mV to 50Volt RMS in eight ranges.Simply connect to your Avo-meter set to 50µA range.
Circuit diagram for Precision Audio Millivoltmeter
Parts:
R1_____909K 1/2W 1% Metal Oxide Resistor
R2______90K9 1/2W 1% Metal Oxide Resistor
R3_______9K09 1/2W 1% Metal Oxide Resistor
R4_______1K01 1/2W 1% Metal Oxide Resistor
R5_____100K More >
Simple Square wave Generator – Electronic circuit
Aug 5th
It’s a Simple Square wave Generator, Three switchable frequencies: 100Hz, 1KHz, 10KHz,1.5V battery operated, minimum parts counting.
circuit diagram for Simple Square wave Generator
Parts:
R1____________560K 1/4W Resistor
R2____________680R 1/4W Resistor
R3______________2K2 1/4W Resistor
R4____________150K 1/4W Resistor
C1_____________12nF 63V Polyester Capacitor
C2______________1n2 63V Polyester Capacitor
C3____________120pF 63V Polystyrene or ceramic Capacitor
C4,C5__________10µF More >
Sound Pressure Level Meter – Electronic Circuit
Aug 4th
It’s a Sound Pressure Level Meter Circuit.Suitable for home-cinema setup.9 Volt operated portable unit.
circuit diagram for Sound Pressure Level Meter
Parts:
R1______________10K 1/4W Resistor
R2,R3___________22K 1/4W Resistors
R4_____________100K 1/4W Resistor
R5_____________100R 1/4W Resistor
C1_______________1µF 63V Polyester or Electrolytic Capacitor
C2_____________100µF 25V Electrolytic Capacitor
C3_____________220µF 25V Electrolytic Capacitor
D1-D4_________BAT46 100V 150mA Schottky-barrier Diodes
IC1__________CA3140 Op-Amp IC
MIC___________Miniature electret More >
Automatic Loudness Control
Aug 3rd
It’s a Automatic Loudness Control Electronic Circuit.Simple add-on module,Switchable “Control-flat” option.
circuit diagram for Simple Square wave Generator
Parts:
P1_________________10K Linear Potentiometer (Dual-gang for stereo)
R1,R6,R8__________100K 1/4W Resistors
R2_________________27K 1/4W Resistor
R3,R5_______________1K 1/4W Resistors
R4__________________1M 1/4W Resistor
R7_________________20K 1/2W Trimmer Cermet
C1________________100nF 63V Polyester Capacitor
C2_________________47nF 63V Polyester Capacitor
C3________________470nF More >
Audio Clipping Indicator – Electronic circuit
Aug 2nd
It’s an Audio Clipping Indicator Electronic Circuit .Detects clipping in preamp stages, mixers, amplifiers etc.Single LED display – 9V Battery supply unit.
Circuit diagram for Audio Clipping Indicator
Parts:
R1_______________1M 1/4W Resistor (See Notes)
R2,R3,R8_______100K 1/4W Resistors
R4,R6___________10K 1/4W Resistors
R5_______________5K 1/2W Trimmer Cermet or Carbon
R7_______________2K2 1/4W Resistor
R9______________22K 1/4W Resistor
R10______________1K 1/4W Resistor (See Notes)
C1,C4__________220nF More >
Amplifier Timer – Electronic Circuit
Aug 1st
It’s an Amplifier Timer Electronic circuit.Turns-off your amplifier when idle for 15 minutes.Fed by amplifier tape-output.
circuit diagram for Amplifier Timer
Parts:
R1,R8___________1K 1/4W Resistors
R2,R3___________4K7 1/4W Resistors
R4_____________22K 1/4W Resistor
R5______________4M7 1/4W Resistor
R6,R9__________10K 1/4W Resistors
R7______________1M5 1/4W Resistor
R10___________100K 1/4W Resistor
R11____________15K 1/4W Resistor
R12____________10M 1/4W Resistor
R13_____________1M More >
Headphone Amplifier – Electronic circuit
Jul 31st
it’s a Headphone Amplifier Electronic circuit ,High Quality unit,No need for a preamplifier
circuit diagram for Headphone Amplifier
Amplifier parts:
P1_____________22K Log.Potentiometer (Dual-gang for stereo)
R1____________560R 1/4W Resistor
R2,R3__________10K 1/4W Resistors
R4_____________12K 1/4W Resistor
R5,R6___________2R2 1/4W Resistor
R7_____________22R 1/2W Resistor
C1______________1µF 63V Polyester Capacitor
C2,C3,C4______100µF 25V Electrolytic Capacitors
C5_____________22pF More >
Phono Preamplifier – Electronic circuit
Jul 30th
It’s a Phono Preamplifier Electronic Circuit.Simple circuitry suitable for moving-magnet cartridges ,Passive high-frequency equalization.
circuit diagram for Phono Preamplifier
Parts:
R1_________47K 1/4W Resistor
R2________100R 1/4W Resistor
R3__________6K8 1/4W Resistor
R4_________68K 1/4W Resistor
R5,R6_______2K7 1/4W Resistor
R7__________2K2 1/4W Resistor
R8_________39K 1/4W Resistor
C1-C3_____100µF 25V Electrolytic Capacitors
C4,C5______47nF 63V Polyester Capacitors 5% tolerance
D1,D2__BZX79C18 18V More >