Kumpulan Rangkaian Elektronika

Rangkaian elektronika sederhana

Posts Tagged ‘Amplifier’

Stereo Preamplifier with Bass-boostTuesday, December 23rd, 2008

Stereo Preamplifier with Bass-boost

Desain Sederhana yang berkualitas

20 s/d 30 Volt Supply

Gambar Rangkaian Preamplifier

Parts:

P1_________________10K Log.Potentiometer (Dual-gang for stereo)

P2________________100K Log.Potentiometer (Dual-gang for stereo) (See Notes)

R1,R2_____________100K 1/4W Resistors

R3,R6______________15K 1/4W Resistors

R4_________________10K 1/4W Resistor

R5_________________22K 1/4W Resistor

R7__________________1K 1/4W Resistor

R8________________560R 1/4W Resistor

C1,C2,C5____________2µ2 63V Electrolytic Capacitors

C3________________470µF 35V Electrolytic Capacitor

C4__________________1µF 63V Polyester Capacitor

C6_________________47nF 63V Polyester Capacitor

C7_________________22µF 25V Electrolytic Capacitor

IC1_______________TL072 Dual BIFET Op-Amp

SW1________________DPST Switch (Optional, see Notes)

Comments:

This preamplifier was designed to cope with CD players, tuners, tape recorders etc., providing

an ac voltage gain of 4, in order to drive less sensitive power amplifiers. As modern Hi-Fi

home equipment is frequently fitted with small loudspeaker cabinets, the bass frequency

range is rather sacrificed. This circuit features also a bass-boost, in order to overcome this

problem. You can use a variable resistor to set the bass-boost from 0 to a maximum of

+16dB @ 30Hz. If a fixed, maximum boost value is needed, the variable resistor can be

omitted and substituted by a switch.

Notes:

* Schematic shows left channel only, but R1, R2, R3 and C1, C2, C3 are common to both

channels.

* For stereo operation P1, P2 (or SW1), R4, R5, R6, R7, R8 and C4, C5, C6, C7 must be

doubled.

* Numbers in parentheses show IC1 right channel pin connections.

* A log type for P2 ensures a more linear regulation of bass-boost.

* Needing a simple boost-in boost-out operation, P2 must be omitted and SW1 added as

shown in the diagram.

* For stereo operation SW1 must be a DPST type.

* Please note that, using SW1, the boost is on when the switch is open, and off when the

switch is closed.

Technical data @ (30V supply):

Ac voltage gain @ 1KHz: 4

Max. input voltage @ 50Hz: 500mV RMS (280mV RMS @ 20V supply)

Max. input voltage @ 100Hz: 700mV RMS (460mV RMS @ 20V supply)

Max. output voltage: >8V RMS (>5V RMS @ 20V supply)

Max. bass-boost referred to 1KHz:

400Hz = +2dB; 200Hz = +5dB; 100Hz = +10dB; 50Hz = +14dB; 30Hz = +16dB

Total harmonic distortion @ 100Hz and 1V RMS output: 0.02%

Total harmonic distortion @ 1KHz and 1V RMS output: 0.006%

Total harmonic distortion @10KHz and 1V RMS output: 0.007%

Total harmonic distortion @ 100Hz and 5V RMS output: 0.02%

Total harmonic distortion @ 1KHz and 5V RMS output: 0.0013%

Total harmonic distortion @10KHz and 5V RMS output: 0.005%

Current drawing: 2mA

Tags: Amplifier, preamplifier, rangkaian elektronikaPosted in Audio, Elektronika | No Comments »

Audio Amplifier 18WWednesday, December 17th, 2008

Rangkaian Amplifier 18w

Komponen :

P1_____________22K Log. Potentiometer (Dual-gang for stereo)

R1______________1K 1/4W Resistor

R2______________4K7 1/4W Resistor

R3____________100R 1/4W Resistor

R4______________4K7 1/4W Resistor

R5_____________82K 1/4W Resistor

R6_____________10R 1/2W Resistor

R7_______________R22 4W Resistor (wirewound)

R8______________1K 1/2W Trimmer Cermet (optional)

C1____________470nF 63V Polyester Capacitor

C2,C5_________100µF 3V Tantalum bead Capacitors

C3,C4_________470µF 25V Electrolytic Capacitors

C6____________100nF 63V Polyester Capacitor

D1___________1N4148 75V 150mA Diode

IC1________TLE2141C Low noise, high voltage, high slew-rate Op-amp

Q1____________BC182 50V 100mA NPN Transistor

Q2____________BC212 50V 100mA PNP Transistor

Q3___________TIP42A 60V 6A PNP Transistor

Q4___________TIP41A 60V 6A NPN Transistor

J1______________RCA audio input socket

Power supply parts:

R9______________2K2 1/4W Resistor

C7,C8________4700µF 25V Electrolytic Capacitors

D2_____________100V 4A Diode bridge

D3_____________5mm. Red LED

T1_____________220V Primary, 15 + 15V Secondary, 50VA Mains transformer

PL1____________Male Mains plug

SW1____________SPST Mains switch

________________________________________

Notes:

• Can be directly connected to CD players, tuners and tape recorders.

• Do not exceed 23 + 23V supply.

• Q3 and Q4 must be mounted on heatsink.

• D1 must be in thermal contact with Q1.

• Quiescent current (best measured with an Avo-meter in series with Q3 Emitter) is not

critical.

• Adjust R3 to read a current between 20 to 30 mA with no input signal.

• To facilitate quiescent current setting add R8 (optional).

• A correct grounding is very important to eliminate hum and ground loops. Connect to the

same point the ground sides of J1, P1, C2, C3 & C4. Connect C6 to the output ground.

• Then connect separately the input and output grounds to the power supply ground.

________________________________________

Technical data:

Output power:

18 Watt RMS into 8 Ohm (1KHz sine wave)

Sensitivity:

150mV input for 18W output

Frequency response:

30Hz to 20KHz -1dB

Total harmonic distortion @ 1KHz:

0.1W 0.02% 1W 0.01% 5W 0.01% 10W 0.03%

Total harmonic distortion @10KHz:

0.1W 0.04% 1W 0.05% 5W 0.06% 10W 0.15%

Unconditionally stable on capacitive loads

Tags: Add new tag, Amplifier, hobi elektronika, rangkaian elektronikaPosted in Audio | No Comments »

Alat bantu pendengaranTuesday, December 16th, 2008

dengar suara nun jauh dengan jelas

Supply battere 1,5 v

Disitus aslinya Rangkaian ini dinamakan Amplified Ear.Rangkaian ini di hubungkan ke mini-

earphones 32 ohm.dapat mendeteksi suara yg sangat jauh.sangat berguna ketika berada di

tempat luas yg yang kurang memiliki sistem sound yang bagus seperti ruang

pertemuan,ruang rapat,ruang kuliah.setiap kata akan terdengar sangat jelas.kita juga dapat

menonton TV dengan volume yg disetel sangat Pelan,agar tidak mengganggu keluarga dan

tetangga yg sedang istirahat atau tidur.bahkan jika memiliki pendengaran yg kurang

sempurna sekalipun,kamu akan mendengar suara yg tak terbayangkan sebelumnya

menggunakan perangkat ini.\

Gambar Rangkaian Amplified Ear

Komponen :

P1_____________22K Log. Potentiometer (see Notes)

R1,R9__________10K 1/4W Resistors

R2______________1M 1/4W Resistor

R3______________4K7 1/4W Resistor

R4,R7_________100K 1/4W Resistor

R5______________3K9 1/4W Resistor

R6______________1K5 1/4W Resistor

R8_____________100R 1/4W Resistor

C1,C2_________100nF 63V Polyester or Ceramic Capacitors

C3,C6___________1µF 63V Polyester or Ceramic Capacitors

C4_____________10µF 25V Electrolytic Capacitor

C5____________470µF 25V Electrolytic Capacitor

D1___________1N4148 75V 150mA Diode

Q1,Q2,Q3,_____BC547 45V 100mA NPN Transistors

Q4____________BC337 45V 800mA NPN Transistor

MIC1__________Miniature electret microphone

SW1____________SPST Switch (Ganged with P1)

J1_____________Stereo 3mm. Jack socket

B1_____________1.5V Battery (AA or AAA cell etc.)

Circuit operation:

The heart of the circuit is a constant-volume control amplifier. All the signals picked-up by the

microphone are amplified at a constant level of about 1 Volt peak to peak. In this manner

very low amplitude audio signals are highly amplified and high amplitude ones are limited.

This operation is accomplished by Q3, modifying the bias of Q1 (hence its AC gain) by means

of R2.

A noteworthy feature of this circuit is 1.5V battery operation.

Typical current drawing: 7.5mA.

Notes:

* Due to the constant-volume control, some users may consider P1 volume control

unnecessary. In most cases it can be omitted, connecting C6 to C3. In this case use a SPST

slider or toggle switch as SW1.

* Please note the stereo output Jack socket (J1) connections: only the two inner connections

are used, leaving open the external one. In this way the two earpieces are wired in series,

allowing mono operation and optimum load impedance to Q4 (64 Ohm).

* Using suitable miniature components, this circuit can be enclosed in a very small box,

provided by a clip and hanged on one’s clothes or slipped into a pocket.

* Gary Pechon from Canada reported that the Amplified Ear is so sensitive that he can hear a

whisper 7 meters across the room.

He hooked a small relay coil to the input and was able to locate power lines in his wall. He

was also able to hear the neighbor’s stereo perfectly: he could pick up the signals sent to the

speaker voice coil through a plaster wall.

Gary suggests that this circuit could make also a good electronic stethoscope.

Tags: Amplifier, hobi elektronika, rangkaian elektronikaPosted in Audio | 4 Comments »

2W Audio AmplifierMonday, December 15th, 2008

Amplifier 2WRangkaian Ampilifier ini di desain untuk bisa di masukan kedalam mini box speaker 2 , 4 dan

8 ohm.rangkaian ini juga dilengkapi dengan switch Bass-Booster.dapat di hubungkan ke jalur

output walkman,mini disc,iPod,CD Player ,Komputer dan perangkat lain yang sejenis yang

ada jalur output headphonenya.

Rangkain ini di desain tanpa menggunakan IC dengan menggunakan metode yang terkesan

agak ketinggalan zaman.ampilfier di supply dengan tegangan 12 v.switch SW1 akan

menghasilkan suara bass-booster,tapi pada saat bersamaan volume harus dinaikan sebagai

kompensasi kehilangan tenaga pada frekwensi tinggi.

Gambar Mini Ampilfier 2W

Komponen

Resistor

P1_____________10K Log.Potentiometer

R1,R2__________33K 1/4W Resistors

R3_____________33R 1/4W Resistor

R4_____________15K 1/4W Resistor

R5,R6___________1K 1/4W Resistors

R7____________680R 1/4W Resistor

R8____________120R 1/2W Resistor

R9____________100R 1/2W Trimmer Cermet

Kapasitor

C1,C2__________10µF 63V Electrolytic Capacitors

C3____________100µF 25V Electrolytic Capacitor

C4,C7_________470µF 25V Electrolytic Capacitors

C5_____________47pF 63V Ceramic Capacitor

C6____________220nF 63V Polyester Capacitor

C8___________1000µF 25V Electrolytic Capacitor

Dioda

D1___________1N4148 75V 150mA Diode

Transistor

Q1____________BC560C 45V 100mA PNP Low noise High gain Transistor

Q2____________BC337 45V 800mA NPN Transistor

Q3____________TIP31A 60V 4A NPN Transistor

Q4 ___________TIP32A 60V 4A PNP Transistor

Lain-lain

SW1___________SPST switch

SPKR__________3-5 Watt Loudspeaker, 8, 4 or 2 Ohm impedance

dalam penggunaan nantinya,R9 harus di set dengan seksama demi mengurangi distorsi suara

yang di timbul.dan tentu saja harus di buat 2 buah rangkaian untuk menghasilkan output

stereo dari rangkaian ini.

selamat mencoba

Tags: Add new tag, Amplifier, hobi elektronika, rangkaian elektronikaPosted in Audio | 5 Comments »

Calendar

July 2009

M T W T F S S

« Feb

1 2 3 4 5

6 7 8 9 10 11 12

13 14 15 16 17 18 19

20 21 22 23 24 25 26

27 28 29 30 31

• Blogrollo Electronic Circuits

o

Halamano Contoh

Categorieso Elektronika

Audio

Power Supply Kumpulan Rangkaian Elektronika is proudly powered by WordPress

Entries (RSS) and Comments (RSS).