4 Channel Portable Audio Mixer

The target of this project was the design of a small portable mixer supplied by a 9V PP3 battery, keeping high quality performance. The mixer is formed assembling three main modules that can be varied in number and/or disposition to suit everyone needs. The three main modules are:

Input Amplifier Module: a low noise circuit equipped with a variable voltage-gain (10 - 100) preset, primarily intended as high quality microphone input, also suitable for low-level line input.

Tone Control Module: a three-band (Bass, Middle, Treble) tone control circuit providing unity-gain when its controls are set to flat frequency response. It can be inserted after one or more Input Amplifier Modules and/or after the Main Mixer Amplifiers.

Main Mixer Amplifier Module: a stereo circuit incorporating two virtual-earth mixers and showing the connection of one Main Fader and one Pan-Pot.

The image below shows a Block diagram of the entire mixer featuring four Input Amplifier Modules followed by four in-out switchable Tone Control Modules, one stereo Line input, four mono Main Faders, one stereo dual-ganged Main Fader, four Pan-Pots, a stereo Main Mixer Amplifier Module and two further Tone Control Modules switchable in and out for each channel, inserted before the main Left and Right outputs.

Obviously this layout can be rearranged at everyone wish. An astonishing feature of this design lies in the fact that a complete stereo mixer as shown below in the Block diagram draws less than 6mA current!


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1.4 Channel Portable Audio Mixer Input Amplifier Module

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Parts:

R1 = 22K - 1/4W Resistor
R2 = 22K - 1/4W Resistor
R3 = 47K - 1/4W Resistor
R4 = 47K - 1/4W Resistor
R5 = 47K - 1/4W Resistor
R6 = 4K7 - 1/4W Resistor
R7 = 22K - 1/4W Resistor
R8 = 220R - 1/4W Resistor
R9 = 2K - 1/2W Trimmer Cermet (See Notes)
R10 = 470K - 1/4W Resistor
R11 = 560R - 1/4W Resistor
R12 = 100K - 1/4W Resistor
R13 = 220R - 1/4W Resistor

C1 = 470nF - 63V Polyester Capacitor
C2 = 100µF - 25V Electrolytic Capacitor
C3 = 2µ2 - 63V Electrolytic Capacitor
C4 = 2µ2 - 63V Electrolytic Capacitor
C5 = 2µ2 - 63V Electrolytic Capacitor
C6 = 47pF - 63V Ceramic Capacitor
C7 = 4µ7 - 63V Electrolytic Capacitor
C8 = 100µF - 25V Electrolytic Capacitor
Q1 = BC560C - 45V 100mA Low noise High gain PNP Transistor
Q2 = BC550C - 45V 100mA Low noise High gain NPN Transistor
IC1 = TL061 - Low current BIFET Op-Amp

Circuit Description:

The basic arrangement of this circuit is derived from the old Quad magnetic pick-up cartridge module. The circuit was rearranged to cope with microphone input and a single-rail low voltage supply. This low-noise, fully symmetrical, two-transistor head amplifier layout, allows the use of a normal FET input Op-Amp as the second gain stage, even for very sensitive microphone inputs. The voltage-gain of this amplifier can be varied by means of R9 from 10 to 100, i.e. 20 to 40dB.

Notes:

• R9 can be a trimmer, a linear potentiometer or a fixed-value resistor at will.
• When voltage-gain is set to 10, the amplifier can cope with 800mV peak-to-peak maximum Line levels.
• Current drawing for one Input Amplifier Module is 600µA.
• Frequency response is 20Hz to 20KHz - 0.5dB.
• Total Harmonic Distortion measured with voltage-gain set to 100: 2V RMS output = <0.02%>
• Total Harmonic Distortion measured with voltage-gain set to 10 & 33: 2V RMS output = <0.02%>
• THD is much lower @ 1V RMS output.
• Maximum undistorted output voltage: 2.8V RMS.

 
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2. 4 Channel Portable Audio Mixer 2Tone Control Module

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Parts:

P1 = 100K - Linear Potentiometer
P2 = 100K - Linear Potentiometer
P3 = 470K - Linear Potentiometer

R1 = 12K - 1/4W Resistor
R2 = 12K - 1/4W Resistor
R3 = 12K - 1/4W Resistor
R4 = 3K9 - 1/4W Resistor
R5 = 3K9 - 1/4W Resistor
R6 = 1K8 - 1/4W Resistor
R7 = 1K8 - 1/4W Resistor
R8 = 22K - 1/4W Resistor
R9 = 22K - 1/4W Resistor
R10 = 560R - 1/4W Resistor
R11 = 100K - 1/4W Resistor
R12 = 220R - 1/4W Resistor

C1 = 1µF - 63V Polyester Capacitor
C2 = 47nF - 63V Polyester Capacitor
C3 = 4n7 - 63V Polyester Capacitor
C4 = 22nF - 63V Polyester Capacitor
C5 = 4n7 - 63V Polyester Capacitors
C6 = 100µF - 25V Electrolytic Capacitor
C7 = 4µ7 - 63V Electrolytic Capacitor
C8 = 100µF - 25V Electrolytic Capacitor
IC1 = TL061 - Low current BIFET Op-Amp

Circuit Description:

This is a straightforward design using the Baxandall-type active circuitry slightly modified to obtain a three-band control. Total voltage gain of this module is 1 when controls are set in their center position.

Notes:

• Current drawing for one Tone Control Module is 400µA.
• Frequency response is 20Hz to 20KHz - 0.5dB, controls flat.
• Tone control frequency range: ±15dB @ 30Hz; ±19dB @ 1KHz; ±16dB @ 10KHz.
• Total Harmonic Distortion measured @ 2V RMS output = <0.012%>
• THD is below 0.01% @ 1V RMS output.
• Maximum undistorted output voltage: 2.5V RMS.

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4 Channel Portable Audio Mixer 3 Main Mixer Amplifier Module

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Parts:

P1 = 100K - Linear Potentiometer
P2 = 10K - Linear Potentiometer
R1 = 15K - 1/4W Resistor
R2 = 15K - 1/4W Resistor
R3 = 100K - 1/4W Resistor
R4 = 100K - 1/4W Resistor
R5 = 22K - 1/4W Resistors
R6 = 22K - 1/4W Resistors
R7 = 390K - 1/4W Resistor
R8 = 390K - 1/4W Resistor
R9 = 560R - 1/4W Resistor
R10 = 560R - 1/4W Resistor
R11 = 100K - 1/4W Resistor
R12 = 100K - 1/4W Resistor
R13 = 220R - 1/4W Resistor

C1 = 330nF - 63V Polyester Capacitors
C2 = 330nF - 63V Polyester Capacitors
C3 = 100µF - 25V Electrolytic Capacitors
C4 = 10pF - 63V Ceramic Capacitors
C5 = 10pF - 63V Ceramic Capacitors
C6 = 4µ7 - 63V Electrolytic Capacitors
C7 = 4µ7 - 63V Electrolytic Capacitors
C8 = 100µF - 25V Electrolytic Capacitors
IC1 = TL062 - Low current BIFET Dual Op-Amp

Circuit Description:

The schematic of this circuit is drawn as a stereo unit to better show the input Main Fader and Pan-Pot connections. The TL062 chip contains two TL061 op-amps into the same 8 pin case and is wired as two virtual-earth mixer amplifiers having a voltage gain of about 4, to compensate for losses introduced in the passive Pan-Pot circuitry. Therefore, total voltage-gain is 1.
Each channel added to the mixer must include the following additional parts:
P1, P2, R1, R2, R3, R4, C1 and C2.
These parts must be wired as shown in the above circuit diagram, connecting R3 and R4 to pin #2 and pin #6 of IC1 for Right and Left channel respectively. These IC1 pins are the "virtual-earth mixing points" and can sum together a great number of channels.

Notes:

• Current drawing for one stereo Main Mixer Amplifier Module is 800µA.
• Frequency response is 20Hz to 20KHz - 0.5dB.
• Total Harmonic Distortion measured @ 2V RMS output = <0.008%>
• THD is 0.005% @ 1V RMS output.
• Maximum undistorted output voltage: 2.8V RMS.

Further Parts:

To parts listed above should be added: one Main on-off SPST switch, a LED used as pilot-light with its dropping 2K2 1/4W series-resistor, DPDT switches to enable or omit Tone Control Modules as shown in the Block diagram, input and output connectors of the type preferred, one stereo dual-gang 100K potentiometer to fade the Stereo Line Input as shown in the Block diagram, battery clip, PP3 9V battery, knobs etc.
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Mic-Line Balance input

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Mic-Line Balance input

Password : asinan  Μια επαγγελματική πρόταση για όλους όσους ενδιαφέρονται για επεξεργασία ήχου. Το κύκλωμα αποτελεί το τμήμα εισόδου καναλιού κονσόλας μίξης ήχων προερχόμενων από μικρόφωνο ή πηγή υψηλής στάθμης. Μπορεί να χρησιμοποιηθεί μόνο του ή να πολλαπλασιασθεί ,σε αριθμό ,όσων καναλιών θέλουμε. Περιέχει όλες τις χρήσιμες λειτουργίες όπως : τροφοδοσία τάσης πυκνωτικών μικρόφωνων -αλλαγή φάσης του σήματος - εξασθένηση , για αποφυγή παραμορφώσεων ,από υψηλή στάθμη σήματος - ρύθμιση του κέρδους του καναλιού και τέλος την αποκοπή των χαμηλών συχνοτήτων. Μελλοντικά θα προστεθούν και τα υπόλοιπα σταδία ώστε να σχηματισθεί πλήρης η εικόνα ενός καναλιού επεξεργασίας και μίξης ήχων. Εκείνο που πρέπει να προσεχθεί είναι η ποιότητα και η ακρίβεια των υλικών που χρησιμοποιούμε. Το κύκλωμα μπορεί να συνεργασθεί με το κύκλωμα Parametric EQ .    A professional suggestion for those interested in improving sound. The circuit constitutes the part of input mixing console sound from the microphone or source of high level . It can be used on it's own or be multiplied to the number of channels required. It includes all the useful functions such as, phantom power , reverse face, signal attenuation for avoiding distortions from high level signals regulating channel gains and the rest of the stages will be added next stages ,for full mixing console. Attention must be paid to the quality of the materials used. This circuit may used, previous to Parametric EQ circuit. Part List R1-2= 6.8K ohm R16-19= 4.7Kohm C8-11= 10uF25V electrolytic R3= 56Kohm R17-18= 15Kohm C9-10= 47nF 63V MKT 5% R4-6= 2.2Kohm R20-21= 27Kohm C12-13= 47nF 63V ΜΚΤ 5% R5-7= 220 ohm R22= 22Kohm T1-2= BC560C R8-9= 39Kohm R23-24-25= 47Kohm IC1= NE5532, TL072 R10-11= 2.7Kohm C1-2= 33uF 63V electrolytic S1-5= On/off  Sw R12-13= 4.7Kohm C3-4= 680pf ceramic or mylar JF1-2= 3 pin-connector R14= 68 ohm C6= 100uF 25V electrolytic R15= 10Kohm log. pot. C5-7= 120pF ceramic or mylar Αll Registor is 1% metal film

2 Channel + Microphone Stereo Mixer

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 2 Channel + Microphone Stereo Mixer Bab 1



2Channel + Microphone Stereo Mixer

A lot of friends me asked to draw a more shrunk circuit 2-ch mixer, which will contain also, operation CROSSFADER. The circuits can be modified and added also other channels, repeating basic that I give. It can are added channels stereo PHONO/line or even channels microphone with proportional modification of next stages. In the Fig.1 exist the input circuits of two channels and input of microphone channel. The two basic channels she is same between them. Thus that it’s go for a channel, the he is also go for the other. In each stereo channel exist two inputs, classic stereo input PHONO that is practical a correction filter RIAA and concerns the signal amplification of sound that emanates from the classic reproduction heads of classic disks LP. Exist also a stereo input of LINE ‘’high level’’ for signals that emanate from CD players, Tuners, DVD, etc. The exits of this two stages are selected with switch S1 or S2 and they are applied in the next stage which is constituted from adder IC3. Here is regulated the BALANCE with the RV5 and GAIN with the RV1. In the next stage round the IC4 exist a classic 3-band regulation of tone circuit, the regulation of which becomes with the RV2-3-4. The exit of IC4 drive the RV6 that is at preference pontesometer [FADER]. By points 1-2-5-6 the signals connected to next stage [Fig.2]. In the Fig.1 exist also the microphone input, which is in electronic Balance connection, round the IC9A. Here exist the regulation of GAIN with the RV13. It follows a stage of tone two-band regulation, round the IC9B and a stage of parametric regulation of mid band with RV16 [Gain] and RV17 [Frequency Band]. With the RV19 we regulate VOLUME [FADER] and with the RV18 we regulate the BALANCE. By points 9-10-11 the signal is connected to the corresponding points that are found in the Fig. 2.

Part List [Fig.1]

R1-7-15-16-41-48-55-56=47 Kohms C1-13-37-45=150pF mylar-ceramic IC1-5-9-10=NE5532-LM833 R2-8-42-49=150 ohms C2-3-15-16-20-21-27-28-38-39=47nF IC2-3-4-67-8=TL072 R3-5-9-11-43-45-50-52=180 Kohms C4-5-9-11-42-44-47-48=18nF RV1-7=  22 Kohms Log. pot.* R4-6-10-12-44-46-51-53=15 Kohms C6-10-41-46=3.9nF RV2-3-8-9=2X100 Kohms Lin. pot.* R13-14-17-18-47-54-57-58-95=100 Kohms C7-12-43-49-82-83=5.6nF RV4-10=2X470 Kohms Lin. pot.* R19-22-59-62-98-100=4.7 Kohms C8-14-17-18-40-50-53-54-88=10uF 16V RV5-11-18=10 Kohms Lin. pot.* R20-23-60-63-21-24-61-64=10 Kohms C19-30-55-66-89=22pF RV6-12=2X22 Kohms Log. pot. 45mm Slider [FADER] R25-26-33-34-65-66-70-71=10 Kohms C22-31-58-67=47nF RV13=10 Kohms Log. pot.* R27-35-67-73-74-75-78-79-96=10 Kohms C23-32-59-68-25-34-61-70-85=4.7nF RV14-15-16=47 Kohms Lin. pot.* R28-29-36-37-68-69-76-77=3.3 Kohms C24-33-60-69=22nF RV17=2X100 Kohms Log.pot.* R30-31-38-39-70-71-78-79=1.8 Kohms C26-35-62-71=1.2nF RV19=10 Kohms Log. pot. 45mm Slider [FADER] R32-40-72-80=330 ohms C29-36-65-72-80-90=10uF 16V J1-2-5-6=4pin conn. 2.54mm pin step R81-83=2.2 Kohms C56-57-63-64=47nF J3-4-7-8-9-10=3pin conn. 2.54mm pin step R82-97=6.8 Kohms C73-74=1uF 100V MKT Jf1....8=RCA female Jack R84-88-93-94=22 Kohms C75-76=68pF ceramic or mylar JF9=3pin XLR male R85=100 ohms C77-78-86-87=47nF R86-87=2.7 Kohms C79=47uF 16V R89-90=5.6 Kohms C81=2.2nF *ALPS or PIHER type Potentiometer R91-92=3.9 Kohms C84=10nF All the Resistors is 1/4W 1% metal film R99-101=10 Kohms S1-2=2X2 0N/ON SW All the [nF] capacitors is 63-100v 5% MKT

Download Skema : 2 Channel + Microphone Stereo Mixer Bab 2 In the Fig.2 abut the various signals that emanate from the Fig.1. Switches S3-4-5 execute the operation of pre-Fader-listen [PFL] of proportional channels. If some switch functions then turns on corresponding diode led D4-5-6. Simultaneous turn-on the relay RL1 disconnect the program in the headphone and supply with the PFL signal. Round the IC14 exist the amplifier circuits of headphone drive. Round the IC12 exist the addition circuit of the signals from the two channels and the mic channel, as well the RV20 which function as CROSSFADER between the two stereo channels. The RV21 is final MASTER VOLUME [FADER] and adjust the final percentage of signal to the output. This role undertake the IC13 that has the leading possibility via the outputs Jf13-14 a power amplifier, simultaneously from the exits Jf11-12 we can take signal for recording. Part List [Fig.2]

R102-103-106-107-113-114=10 Kohms RV20=2X22 Kohms Log. pot. 45mm Slider [FADER] Q2-4=BD140 R104-108-117-122-125-126=22 Kohms RV21=2X10 Kohms Log. pot. 45mm Slider [FADER] S3-4=3X2 PDT 0N/ON SW R105-109=1 Mohms RV22=2X10 Kohms Log. pot.* S5=2X2 PDT ON/ON SW R110-111-112=1 Kohms C91-95-97-101-103-106-111-114=22pF RL1=12V Relay 2X2 SW R115-118-120-123-127=10 Kohms C92-93-98-99-104-105-109-110=47nF JF10=Jack female stereo 6.3mm R116-119-121-124-130=10 Kohms C94-96-100-102=10uF 16V JF11....14=RCA female Jack R128-131=27 Kohms C107-108-113-116=470uF 25V J11....14-17=3pin conn. 2.54mm pin ste R129-132-137-138-140-146=100 ohms C112-115=47uF 16V J16-17=4pin conn. 2.54mm pin step R133-135-139-145=100 Kohms IC11-12=TL072 RV20=2X47 Kohms Lin. Slider [FADER]* R134-136=47 ohms IC13-14=NE5532 - LM833 RV21=2X10 Kohms Log. Slider [FADER]* R141-147=10 ohms D1-2-3=1N4002 R142-148=4.7 Kohms D4-5-6=LED 3 or 5mm RED *ALPS or PIHER type Potentiometer R143-149=820 ohms D7=1N4148 All the Resistors is 1/4W 1% metal film R144-150=47 Kohms Q1-3=BD139 All the [nF] capacitors is 63-100v 5% MKT

Download Skema :  2 Channel + Microphone Stereo Mixer Bab 3 In the Fig.3 exist a classic supply circuit and stabilization of various voltages that needs the various circuits of mixer as +/-15V for the Audio department and + 12V for the RL1 and VU meter supplying. The regulators IC18-19-20 good it’s they are placed on small heatsinks. Transformer T1 it’s placed in a separate box, far from the remainder circuit, so that is not created problem of influence of rests circuits, from noise, unless it’s toroidal. In the Fig.4 is found the indication circuit of level. This becomes with two classic circuits round the IC16-17 that drive the diodes Led D12…..D31, that portrays the level in steps of 3dB. The IC15 functions as precision rectifier. Part List [Fig.3-4]

R151-152-156-157=10 Kohms BR1= 80V/3A BRIDGE RECTIFIER IC20=7915  on Heatsink R153-154-155-158-159=1 Kohms D8-9-10-11=1N4148 T1=230V//2X15Vac >30VA R160=2.7 Kohms D12.......31-32=RED LED F1=500mA SLOW BLOW FUSE C117-118-124-125-127-128-130-131=100nF D33=12V 0.5W ZENER S6=2X2 ON-OFF SWITCH C119-121=1uF 25V IC15=TL072 J18=3pin conn. 3.96mm pin step C120=10uF 25V IC16-17=LM3516 C122-123=4700uF 40V IC18=7812  on Heatsink All the Resistors is 1/4W 1% metal film C126-129-132=19uF 25V IC19=7815  on Heatsink All the [nF] capacitors is 63-100v 5% MKT

SPECIFICATIONS PHONO INPUT [Unbalaced RCA] Sensitivity 2.5mV rms Impedance 47K//150pF LINE INPUT [Unbalaced RCA] Sensitivity 1V rms Impedance 47K Gain X1 until X3 3-band EQ   50HZ, 1KHZ, 10KHZ [±18dB/oct] MIC INPUT [Balanced XLR] Sensitivity -56dB Impedance 2K Gain 36dB EQ. Section High ±18db at 20KHZ Mid. Freq. 200HZ - 6KHZ Mid. Gain ±15db Low ±18db at 20HZ HEADPHONE OUT impedance 100 ohms min. FREQUENCY RESPONSE 20HZ-20KHZ -2dB DISTROTION T.H.D 0.01% A 1KHZ OUTPUT LEVEL +4db Typ.

Block Diagram

In the Fig.5 appears the block diagram of circuit, which it will help in the comprehension of logic of circuit.

Peavey Rockmaster 91

 



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Peavey Rockmaster 91

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Peavey Eddie van Halen 5150

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Peavey Eddie van Halen 5150 

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Amplifier Peavey C30

 

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Amplifier Peavey C30

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Amplifier Peavey C20

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Amplifier Peavey C20

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Guitar Fuzz Box

This circuit was designed to obtain a valve-like distorted sound from an electric guitar or other musical instrument. For this purpose a very high gain, three-FET amplifier circuit, was used. The output square wave shows marked rounded corners, typical of valve-circuits when driven into saturation. Therefore, the distorted sound obtained from such a device has a peculiar tone, much loved by most leading guitarists.


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Guitar Fuzz Box

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Circuit set-up using oscilloscope and sine wave generator:
Connect a 1KHz sine wave generator to J1 and the oscilloscope to J2.
Adjust R4 until the output square wave shows equal mark-space ratio.

"By ear" circuit set-up:
Connect a musical instrument to J1 and an amplifier to J2.
Carefully adjust R4 in order to obtain as maximum output sound intensity as possible.

Rangkaian Echo Repeater PT2399

Rangkaian Echo Repeater PT2399 merupakan rangkaian pembangkit gema pada sistem audio. Rangkaian Echo Repeater PT2399 ini pada umumnya dipasang pada sistem pengolah sinyal audio dari microphone untuk membangkitkan efect gema dari sinyal audio microphone. Rangkaian Echo Repeater PT2399 dipasang setelah pengatur nada pada bagian mixer sinyal audio microphone. “Rangkaian Echo Repeater PT2399″ ini menggunakan IC PT2399 sebagai komponen utamanya, IC PT2399 merupakan IC yang didesain khusus oleh Princeton Technology Corporation sebagai echo prosesor. IC PT2399 merupakan prosessor echo digital yang mampu memberikan effect gema yang real. IC PT2399 menggunakan microcontroller sebagai pembangkit dan pengontrol gema dari sistem delay dan banyaknya pengulangan (repeat) gema tersebut. Untuk membuat Rangkaian Echo Repeater PT2399 dapat dilihat skema rangkaian dan komponen yang digunakan pada gambar berikut. 

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Rangkaian Echo Repeater PT2399

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Rangkaian Echo Repeater PT2399,Gambar Rangkaian Echo Repeater PT2399,echo,audio echo,echo repeater,rangkaian audio echo,skema audio echo,membuat audio echo,merakit audio echo,audio echo rakitan,harga audio echo,kit audio echo,jual audio echo,cara seting audio echo,cara pasang audio echo,cara buat audio echo,echo digital,harga echo digital,kit echo digital,jual echo digital,rangkaian echo digital,skema echo digital,buat echo repeater,harga echo repeater,kit echo repeater,jual echo repeater,harga echo repeater,rangkaian echo repeater,fungsi echo repeater,instal echo repeater,cara pasang echo repeater,skema echo repeater,menggunakan echo repeater Rangkaian Echo Repeater PT2399 ini dapat dioperasikan menggunakan sumber tegangan DC + 5 volt dari sebuah power supply. Dalam pemasangannya Rangkaian Echo Repeater PT2399 diberikan input dari output tone contrl microphone atau dari pre-amplifier microphone, kemudian output dari Rangkaian Echo Repeater PT2399 ini diberikan ke penguat audio atau amplifier. Pada Rangkaian Echo Repeater PT2399 ini terdapat 2 kontrol pembangkit effect gema yaitu “delay” dan “repeat”. Kontrol delay pada Rangkaian Echo Repeater PT2399 ini berfungsi untuk mengatur jarak pengulangan sinyal audio yang dibangkitkan. Sedangkan kontrol repeat pada Rangkaian Echo Repeater PT2399 ini berfungsi untuk mengatur banyaknya pengulangan sinyal audio yang dibangkitkan. Kontrol delay pada Rangkaian Echo Repeater PT2399 ini dapat diatur menggunakan potensiometer 20 KOhm yang terhubung pada pin 6 IC PT2399. Sedangakan kontrol repeat pada V ini dpaat diatur menggunakan potensiometer 50 KOhm pada pin 16 dan 14 IC PT2399.

Rangkaian Mixer 3 Chanel

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Rangkaian Mixer 3 Chanel

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Rangkaian mixer 3 chanel pada gambar dibawah dibuat menggunakan penguat tegangan dari transistor yang disusun beberapa tingkat. Mixer 3 chanel ini terdiri dari 3 buah pre-amp mic transistor dan penguat tegangan dengan transistor darlington. Untuk mengoperasikan rangkaian mixer 3 chanel ini diperlukan sumber tegangan DC + 9 volt yang dapat diambil dari suatu batere maupun dari power supply. Berikut adalah gambar rangkaian dan komponen untuk membuat rangkaian mixer audio 3 chanel dimaksud. Rangkaian Mixer 3 Chanel Transistor Rangkaian Mixer 3 Chanel Transistor,Rangkaian mixer 3 chanel,Mixer 3 chanel,mixer audio,mixer sound sistem,harga mixer audio,harga mixer sound sitem,jual mixer soud sistem,jual mixer audio murah,rangkaian mixer audio,skema mixer audio,pcb mixer audio,mixer audio rakitan,merakit ,membuat mixer audio,cara buat mixer audio,cara seting mixer audio,menggunakan ,cara buat mixer audio,cara seting mixer audio,menggunakan mixer audio,mengoperasikan mixer sound sistem,mixer yamaha,mixer behringer,mixer pro,mixer transistor,mixer sederhan,rangkaian mixer sederhana,skema mixer audio sederhana.

Daftar Komponen Rangkaian Mixer 3 Chanel Transistor 

P1 = 5K 

P2 = 5K 

P3 = 5K

 R1 = 180K 

R2 = 2M2 

R3 = 750R

 R4 = 1K 

R5 = 15K 

R6 = 220R

R7 = 1.5K 

R8 = 820R 

R9 = 150R

 R10 = 100K 

R11 = 180K 

R12 = 2.2M 

R13 = 750R 

R14 = 1K

R15 = 180K 

R16 = 2M2 

R17 = 750R 

R18 = 1K 

C1 = 1µF-63V 

C2 = 100µF-25V 

C3 = 220µF-25V 

C4 = 100µF-25V 

C5 = 220µF-25V 

C6 = 1µF-63V 

C7 = 100µF-25V 

C8 = 1µF-63V 

C9 = 100µF-25V 

Q1 = BC550C 

Q2 = BC547 

Q3 = BC557 

Q4 = BC550C 

Q5 = BC550C 

B1 = 9V 

J1,J2,J3 = 3mm Mono Jack 

SW1,2,3,4 = SPST Toggle 

Pada rangkaian mixer 3 chanel transistor diatas pada dasarnya terdiri dari 2 bagian utama sebagai berikut. Pre-Amplifier Microphone. Bagian pre-amp mic berfungsi sebgai penguat tegangan dari output microphone sebelum dicampur dengan sinyal yang lain. Rangkaian pre-amp mic ini dibangun menggunakan penguat tegangan dari transistor NPN tipe BC550C. Pre-amp mic ini di desain untuk menguatkan sinyal output dari microphone tipe dinamic. Pada tiap pre-amp mic rangkaian mixer 3 chanel diatas dilengkapi pengatur penguatan sinyal dari microphone mengunakan potensiometer dan pembatas penguatan level sinyal menggunakan sebuah saklar untuk tiap chanelnya. Penguat Tegangan Transistor Rangkaian penguat tegangan dengan transistor darlington ini berfungsi untuk menguatkan sinyal dari pre-amp mic dan sebagai bagian pencampur sinyal-sinyal dari pre-amp mic yang diberikan ke rangkaian penguat tegangan ini. Rangkaian penguat tegangan ini dibangun menggunakan transistor NPN tipe BC547 dan BC557 yang dirangkai secara darlington. Pada bagian ini sinyal dari pre-amp mic dicampur secara langsung dan diberikan sebagai input rangkaian mixer.

Audible Flasher Warning

If you’re a biker or scooter rider you’ll know how easy it is to forget to cancel your flashing indicators after turning without an audible reminder. Constantly glancing at indicator lamps is hardly an option; your eyes should be on the road ahead! The simple circuit shown here provides an audible reminder. The clever bit is the way it doesn’t annoy you by beeping the instant you activate the flashers but only after a preset time, in other words when your indicators are active longer than normal. Supply to the circuit is through the flasher relay.

With the indicators activated a squarewave voltage reaches bridge rectifier D1-D4 via terminal T1 or T2, with the other terminal remaining grounded through the indicator lamp that’s inactive. The pulsed DC voltage is stored and smoothed in C1, with D5 preventing the electrolytic from discharging during the periods when the flasher voltage is off. This also provides an adequately clean supply voltage for the 555 timer whenever the indicators are operating. Timer IC1 is used here as an oscillator and controls a piezo sounder by means of transistor T1.

Download Skema :

Audible Flasher Warning 

Password : asinan

Circuit diagram:

Audible Flasher Warning Circuit Diagram

The output of the 555 is active Low, meaning that initially the transistor is blocked and the sounder is silent. The timer always charges and discharges capacitor C2 to a level between a third and two-thirds of the operating voltage, producing an interval of 0.7 x C2 x (R2 + R1 + P1) [s] The preset enables you to set this delay up to a second or so. The initial delay, before the sounder first operates, is significantly longer, however, because the electrolytic has zero charge. Only after this delay is the output active, for the pulse duration of 0.7 x C2 x R2 (equivalent to about 0.15 seconds), enabling the sounder to operate.

This applies only when +12 V is present at the collector of transistor T1, which is the situation when the flasher relay is just switched on and the indicator bulbs light up. The circuit is built inside a splash-proof enclosure, installed on your machine in a position that’s out of harm’s way. The audible sounder can be positioned anywhere outside the enclosure if it’s a waterproof type. The audible control unit requires only two cable connections, which can be made at any convenient access point.

Guitar Control

 

This preamplifier was designed as a stand-alone portable unit, useful to control the signals generated by guitar pick-ups, particularly the contact "bug" types applied to acoustic instruments. Obviously it can be used with any type of instrument and pick-up. It features a -10dB, 0dB and +10dB pre-set input selector to adjust input sensitivity, in order to cope with almost any pick-up type and model. A very long battery life is ensured by the incredibly low current consumption of this circuit, i.e. less than 800µA.

Download Skema :

Guitar Control

Password : asinan

Parts:

P1,P2_________100K Linear Potentiometers
P3____________470K Linear Potentiometer
P4_____________10K Log. Potentiometer
R1____________150K 1/4W Resistor
R2____________220K 1/4W Resistor
R3_____________56K 1/4W Resistor
R4____________470K 1/4W Resistor
R5,R6,R7_______12K 1/4W Resistors
R8,R9___________3K9 1/4W Resistors
R10,R11_________1K8 1/4W Resistors
R12,R13________22K 1/4W Resistors
C1____________220nF 63V Polyester Capacitor
C2,C8___________4µ7 63V Electrolytic Capacitors
C3_____________47nF 63V Polyester Capacitor
C4,C6___________4n7 63V Polyester Capacitors
C5_____________22nF 63V Polyester Capacitor
C7,C9_________100µF 25V Electrolytic Capacitors
IC1___________TL062 Low current BIFET Dual Op-Amp
J1,J2__________6.3mm. Mono Jack sockets
SW1______________1 pole 3 ways rotary or slider switch
SW2______________SPST Switch
B1_______________9V PP3 Battery Clip for PP3 Battery

Circuit operation:

IC1A op-amp is wired as an inverting amplifier, having its gain set by a three ways switch inserting different value resistors in parallel to R4. This input stage is followed by an active three-band tone control stage having unity gain when controls are set in their center position and built around IC1B.

Technical data:

Frequency response:
20Hz to 20KHz -0.5dB, controls flat.
Tone control frequency range:
±15dB @ 30Hz; ±19dB @ 1KHz; ±16dB @ 10KHz.
Maximum input voltage (controls flat):
900mV RMS @ +10dB input gain; 7.5V RMS @ -10dB input gain.
Maximum undistorted output voltage:
2.5V RMS.
Total Harmonic Distortion measured @ 2V RMS output:
<0.012% @ 1KHz; <0.03% @ 10KHz.
THD @ 1V RMS output:
less 0.01%
Total current drawing:
less 800µA.

Three Channel Audio Splitter

This circuit is suitable to amplify and distribute the audio signals. The input audio signal is applied to the J1 and after passing through the P1, It is buffered and amplified by the IC1 prepared to redistribute. It has 3 outputs to drive 3 audio lines with 300 ohms impedance.

Download Skema :

Three Channel Audio Splitter

Password : asinan


Parts:

J1 = RCA Socket (See Notes)
P1 = 100K-Potentiometre
R* = 10K-100K
R1 = 560K
R2 = 1K
R3 = 2.2K
R4 = 2.7K
R5 = 2.7K
R6 = 330R
R7 = 330R
R8 = 330R
C1 = 100uF-25V
C2 = 100uF-25V
C3 = 100uF-25V
D1 = BZX79C18
D2 = BZX79C18
Q1 = BC337
Q2 = BC327
IC1 = NE5532-34

Notes:

• J1 will be RCA Audio input female socket.
• R* is on your choice it can be choose between 10K to 100K resistor.
• Output capacitor’s value is between 100uf to 470uf and power handling is 25V to 50V.
• You can power up this circuit via +12V/-12V regulated supply but you have to remove following parts Q1-Q2-C2-C3-D1-D2.
• Maximum power ratings +35V/-35V

Audible Flasher Warning

 


If you’re a biker or scooter rider you’ll know how easy it is to forget to cancel your flashing indicators after turning without an audible reminder. Constantly glancing at indicator lamps is hardly an option; your eyes should be on the road ahead! The simple circuit shown here provides an audible reminder. The clever bit is the way it doesn’t annoy you by beeping the instant you activate the flashers but only after a preset time, in other words when your indicators are active longer than normal. Supply to the circuit is through the flasher relay.

With the indicators activated a squarewave voltage reaches bridge rectifier D1-D4 via terminal T1 or T2, with the other terminal remaining grounded through the indicator lamp that’s inactive. The pulsed DC voltage is stored and smoothed in C1, with D5 preventing the electrolytic from discharging during the periods when the flasher voltage is off. This also provides an adequately clean supply voltage for the 555 timer whenever the indicators are operating. Timer IC1 is used here as an oscillator and controls a piezo sounder by means of transistor T1.

Download Skema :

Audible Flasher Warning 

Password : asinan

Circuit diagram:

The output of the 555 is active Low, meaning that initially the transistor is blocked and the sounder is silent. The timer always charges and discharges capacitor C2 to a level between a third and two-thirds of the operating voltage, producing an interval of 0.7 x C2 x (R2 + R1 + P1) [s] The preset enables you to set this delay up to a second or so. The initial delay, before the sounder first operates, is significantly longer, however, because the electrolytic has zero charge. Only after this delay is the output active, for the pulse duration of 0.7 x C2 x R2 (equivalent to about 0.15 seconds), enabling the sounder to operate.

This applies only when +12 V is present at the collector of transistor T1, which is the situation when the flasher relay is just switched on and the indicator bulbs light up. The circuit is built inside a splash-proof enclosure, installed on your machine in a position that’s out of harm’s way. The audible sounder can be positioned anywhere outside the enclosure if it’s a waterproof type. The audible control unit requires only two cable connections, which can be made at any convenient access point.