Audio compresor Sederhana

Ini adalah gambar rangkaian audio compresor yg diambil dari buku 303 rangkaian elektronika
pada rangkaian ini memekai op-amp LF357. sy sudah coba hasilnya lumayan.

bila ada kesalahan dalam menggambar sy mohon maaf........

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PT2395 Enhanced Digital Echo

http://www.cgs.synth.net/modules/cgs44_ddb.html
Delay Development Board

PREVIEW - TESTED. DOCUMENTATION IN PROGRESS
The Delay Development Board has been designed to allow people to experiment with the Princeton Technologies PT2395 Enhanced Digital Echo IC. The delays produced by this chip are quite long, suitable for various forms of echo. As it stands it is not appropriate for use in chorus units or flangers, though it may be possible to achive this by dropping address lines. Other areas such as the feedback network also need improvement over what has been suggested on the application notes for this device, thus this board, to give an easy starting point for such experiments.

A little on how it works:


The schematic of the core of the Delay Development Board.


The board is made up of several distinct blocks, some of which are not connected in any way.

    A buffer for boosting the output signal up to levels suitable for synthesizer use.
    A basic compressor and
    A basic expander to reduce noise generated by the delay chip.
    The delay block itself.
    An experimenters area.

The delay circuit is based on the application note for the PT2395, and I recommend you seek out the appropriate file. The desired file is called "PT2395.pdf" and is 519k in size. Note that there are a number of errors in this app, note. It is even contradictory in places. There are several other versions of the app. note/data sheet, but all are cut-down versions, and are more or less useless.

Construction


The component overlay. Connections can be determined from the circuit diagram and the text below.

This is one of those PCBs than can be assembled in a number of different ways to suit the builder's needs.

On the first run of boards, a track is missing. It runs between pin 4 of the NE570 and AGND (0 volts).

Note that some chips a mounted in the opposite direction to others on this board. Large arrows on the overlay make this clear.

There is a development area to the right end of the board, allowing a 74HC4046 and associated components to be fitted, including two 4024 divider chips. The theory is that voltage control of the delay can be achieved using the 74HC4046, and frequency dependent delays achieved using the phase-locked-loop. At this point this area has not been developed, and is up the the individual experimentor to use or ignore as s/he sees fit.

Connections to and from the PCB:

    B IN Buffer in. The input to the op-amp buffer.
    BIOUT Buffer inverted output.
    B OUT Buffer output.
    C IN Compressor input. Feed input signal in here.
    C OUT Compressor output. Feed this to the input of the delay
    D IN Delay input.
    D OUT Delay output.
    E IN Expander input. Feed from the output of the delay
    E OUT Expander output. Feed this to the buffer, if needed, or to your output jack via an external 1k resistor.
    FB IN Feedback input.
    FB OUT Feedback output. Basically a SPST switch is wired between these two connections to enable the repeat function. A variable resistor may give some degree of control to reduction of successive echos. As it stands, a standard level control "potentiometer" will not work. (i.e. use two wires to the pot, not three. Earthing one end of the pot's travel will foul things up.)
    +5 Connect to 5 volt power supply.
    +15 Connect to 15 volt power supply.
    -15 Connect to negative 15 volt power supply.
    AGND Analog ground. Connect to 0V at PSU if possible, or to 0 volt bus if not.
    DGND Digital ground. Connect to 0V at PSU if possible, or leave disconnected if not. There is a 10R resistor linking the two grounds on the PCB.
    A6 Pair of pads. Provision to cut the trace and route the A7 address line through a switch for reducing the minimum delay. (untested)
    A7 Pair of pads. Provision to cut the trace and route the A6 address line through a switch for reducing the minimum delay. (untested)
    W Pair of pads. Provision to cut the trace and route the Write line through a switch to allow for "holding" of a captured sample. (untested)
    Reset Not used. May be needed if experimenting.
    SEL Select between 64k or 256k modes if using 41256 RAM chip, or permanently wire to DGND if using 4164
    SHORT Sets short delay mode. Tie the other two length selectors to DGND. Connect this pin to +5 volts.
    MED Sets medium delay mode. Tie the other two length selectors to DGND. Connect this pin to +5 volts.
    LONG Sets long delay mode. Tie the other two length selectors to DGND. Connect this pin to +5 volts.

Numbered/coded components:

    RA6 Pull-down resistor to be added if A6 line is cut.
    RA7 Pull-down resistor to be added if A7 line is cut.
    There is no provision for resistor on the write line, so one would need to be added on the rear of the PCB.
    Rfb Value not specified in the app. note. Feedback resistor. Try something between 10k and 100k. There are two Rfb resistors.
    RG Gain setting resistor for the buffer. 47k would give a gain of 1, 4k7 would give a gain of 10, etc.

There are some capacitors marked as high precision in the app. note, and on the circuit diagram above. I suggest using 5% mylar capacitors or better (styrene, poly prop, poly carb, 1%, 2%, etc.) in these positions. Match them if you have a capacitance meter.

Before you start assembly, check the board for etching faults. Look for any shorts between tracks, or open circuits due to over etching. Take this opportunity to sand the edges of the board if needed, removing any splinters or rough edges.

When you are happy with the printed circuit board, construction can proceed as normal, starting with the resistors first, followed by the IC socket if used, then moving onto the taller components.

Take particular care with the orientation of the polarized components such as electrolytics, diodes, transistors and ICs.

When inserting ICs into sockets, take care not to accidentally bend any of the pins under the chip. Also, make sure the notch on the chip is aligned with the notch marked on the PCB overlay.

Notes:

    One builder says he got better results by adding a 10k resistor between pin 12 of the NE570 and ground (thus in parallel with the internal 30k resistor).
    PCB info: 6" x 2" with 3mm mounting holes 0.15" in from the edges.
    Please email me if you find any errors.

Parts list
Ooops.... lost it!

This is a guide only. Parts needed will vary with individual constructor's needs.

The delay chip can be purchased from Small Bear Electronics.

If anyone is interested in buying these boards, please check the PCBs for Sale page to see if I have any in stock.

Can't find the parts? See the parts FAQ to see if I've already answered the question. Also see the CGS Synth discussion group.


Article, art & design copyright 2001 by Ken Stone

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Compressor/limiter/clipper IC ssm 2166

Pemancar FM 500 mWatt; Ronica SC-197

Project ini merupakan project favorit saya karena menggunakan komponen-komponen yang murah dan mudah di dapat, kinerja yang cukup baik, dan langsung bekerja sejak pertamakali di rakit. Saya selalu merekomendasikan project ini pada setiap pemula yang ingin merakit pemancar pertama nya.

Saya telah merakit project ini beberapa kali baik untuk digunakan sendiri maupun untuk memenuhi permintaan teman / pesanan, dan semua yang pernah saya rakit langsung bekerja begitu selesai dirakit. Foto-foto yang ada pd halaman ini adalah salah satu dari sekian pesawat sejenis yang pernah saya rakit.

Pemancar ini merupakan desain dari produsen kit / pcb yang bernama Ronica. Dijual berupa PCB saja tanpa komponen-komponennya.

Echo PT2399 pakai 5 buah

Servis manual mixer Yamaha MC802

ini link skemanya mas : https://picasaweb.google.com/lh/photo/QPI1Q6gJ-cf7i5YI969c4Q?feat=directlink

Audio Modular MIXER with 6 and up input Channel

rcuit AUDIO MIXER, for various uses. I will begin with a circuit which you can it manufacture, as you want. This you can place in the MODULES of inputs any circuit you want, depending on the use that you intend the MIXER, the same is also for the number of input channels, that you will manufacture. Below I will give enough circuits with various levels of quality and complexity. All the circuits that propose and are simple also they maintain, a very good level of quality. For those who they are interested they can make few patience. Shortly I will give project, professional level console of mix signals of sound.

In the Fig. 1 exist the main circuit of MIXER-6Ch. It is constituted by 6 input channels. The channels from CH 1-4 are monophonic channels. The circuit that you will select for this place, can be in input connection, BALANCE or UNBALANCE [ Symmetrical or asymmetrical ], have POWER PHANTOM, for Electret microphones, use various types plugs of input. The channels CH 5-6, are intended for stereo use. The number of input channels they can increase itself as long you want, making choice between mono and stereo of circuits. More details for the input circuits I will give separately for each circuit. The output of each channel drive the RV1-6, that potesometer regulation level of sound. With RV7-12 we create conditions of balance between two channels [ panoramic potesometer [ BALANCE ]]. All the signals from the input channels in this point are added by two adders [ IC1a-b ], for each channel Here exist two trimmer TR1-2 that adjust the gain of each IC, adapting the level of signal of output, in the level that we want. They can be suppressed if you do not need such something. The next stage is a EQUALIZER [ Fig. 9 ], three band of regulation. The IC3α-b, constitute the output of MIXER, they are have gain one and they make the essential isolation of previous stages, with the unit that we will drive. For whoever they want they use headphones, it exist a classic circuit drive of headphones, round the IC2a-b, that give output in the JF13. It can also exist also optical clue of audio level, with a STEREO VUMETER. Circuit that you can select between what I give in the category of VU Meters or that other you want. The supply of various circuits becomes from the power supply that connect to JF12b and gives a variety from voltages, that probably will need. . VU Meter collection [1][2][3]

Part List [Fig.1]

R1.....12=4.7Kohms RV1....4=47Kohms Log. [Fader] C19-20=220uF 25V R13.....24=10Kohms RV5-6-13=2X47Kohms Log. [Fader] Q1-3=BD139 R25-26=22Kohms RV7....12=10Kohms Lin. pot. Log. Q2-4=BD140 R27-30-34-39=100ohms TR1-2=4.7Kohms  trimmer IC1-3=NE5532 R28-29-36-37=100Kohms C1....8=10uF 25V IC2=NE5532 - TL072 R31-42=10Kohms C9-11=47pF ceramic or mylar JF1....6=XLR Female Plug R32-41=4.7Kohms C10-12=47uF 25V JF7....11= RCA Female Plug R33-40=10Kohms C13-14=100uF 25V JF13=JACK Female Plug R35-38=47ohms C15-16=2.2uF 16V  [C17-22=No use] All the Resistors is 1/4W 1% metal film C18-21=100pF ceramic or mylar

Modules for mono Input Channels

A simple choice appear in the Fig. 2, in asymmetrical [ unbalance ] connection of input. It uses integrated circuit [ IC1 ], in inverting and possibility of regulation gain of unit, for low levels [ microphone ] up to high [ line ]. With switch S1 we can, if it is necessary we give supply for the operation of Electret, condenset microphones. In the place of IC1 we can use a variety from integrated circuit that give below. The type of integrated circuit that we will use, depend from the number of input channels, that we will manufacture, for this reason I do not give also concrete type. My own choice is: IC1=NE5534 - NE5532 - LM833- TL072- TL074.

Electronic Balance Mic-Line input Module

In the Fig. 3, appears one stage with much better characteristics, in symmetric connection [ balance ], with continuous regulation of stage from the potesometer 22KΩ. This give the possibility for regulation of sensitivity, from low input levels until high. And in this circuit I do not give concrete type for the IC1-3. The choice can become from the below list, according to the characteristics the each IC and proportionally use for which him we intend. My own choices are: IC1-2=NE5532 - LM833, IC3=NE5534 - TL071.

Microphone transistors preamplifiers

In the Fig. 4-5, exist two choices for preamplifiers of microphone that use transistor, in asymmetrical [ unbalance ] of input connection. For the supply of this stages, exist two choices. The first choice, are with diode zener, the other choice, use voltages that give the regulators, from main power supply..

Mic/Line Balance input Professional

Modules for Stereo Input Channels

For the modules of inputs stereo, exist two choices, that appear in the Fig. 6-7. The first choice in Fig. 6, it is in symmetric input connection [ balance ], while in the Fig. 7, exist one of simple asymmetrical input connection [ unbalance ]. The gain of also two units is one. This gain can increase itself, if this need, if we increase the price of resistors that is parallel with the capacitors 33pF. Should these resistors be equal between them.

Stereo Phono Preamplifier [RIAA Filter]

In the Fig. 8, exist a classic preamplifier PHONO of correction RIAA, for those who they insist they use disks of vinyl. For good precision in the reproduction of sound, should the materials that find in the negative feedback and correct RIAA, to be good quality, as resistors of 1% metal film, the capacitors polypropylene and Mylar. The capacitor C8, adaptation in the input, can change with such price, so that it suits with the characteristics of cartridge that we will use. In the place of IC1 we can use also the LM833 or other completed low noise integrated circuit.

3 Band EQ

In the Fig. 9, exist a simple and classic circuit EQUALIZER, three band, low, mid and high frequencies, with gain of regulation [ ±18 dB/oct ]. All potesometer they are doubly linear and good quality.

Power Supply for 6 Ch MIXER

The Power supply in fig. 10, he is very simple in his designing. There are four regulators that for us provide a variety from voltages, that probably we will need. The basic voltage are ± 15V. The voltage of + 12V is intended basically for the circuit of VUMETER. If we do not use electronic VUMETER, we can him suppress. The himself is also in effect for the voltage of + 5V, (is intended for the input circuits, with transistor [ Fig. 4-5 ], if we do not use the zener diodes). For until 6 input channels the regulators, it does not need they are placed in heatsinks . For more channels good it will be they are placed on heatsinks. Is good transformer T1, it is placed far by the remainder circuits.

In the Fig. 11, appear various choices of connection for various types of plugs, that you can use in all the input circuits. Attention should be given in the connections, so that are not created bronchuses, so that we have hum. The clue [ + HOT ] correspond in signals inside phase, while clue [ - GOLD ] in out phase signals. All the components should be good quality. .

Typical characteristics for IC's, that I propose

The MIXER-6Ch, can be manufactured in a box, which the above surface will have a certain bent. In the place RV1-6, can be used potesometer Fader. So if you cannot accomplish with this manufacture, you can use simply rotatively potesometer in all the places. * If you use NE5534, it should you place capacitor 22pF between pin 5 and 8 .

Pre Fader Listen [PFL] stage for Audio Mixer

Monitor Sel. From Mixer Input Channel To Headphone

Many friends asked if it’s possible in the MIXER exist also a circuit monitor, so that is possible the pre-listen channels without they are open pot. Fader or they can hear that it exist in the each input channel, parallel with the sound that goes to the main output, without exist his effect of one in the other. This work him they make the circuits that I give. In the Fig.13, exist a circuit that this listen becomes from independent switches, with possibility of listen all channels, we want. Parallel, exist also diodes LED D1-6, that shows more channel is open. Then exist a classic summing amplifier and a potesometer that regulates level to headphone amplifier. This signal is charged with the mainly signal, but only in a headphone amplifier. If the circuit became complexer, we could cut the signal from exit L-R, when we pressed some switch. In the Fig.14, exist a circuit that make the same work, but is simpler. Instead of switches, exists a double rotary switch, that select only a input channel each time. In the place of IC1, it can enter somebody from opamp. that propose, choice of that will be proportional units that will be used.

Audio MIXER 6CH in Greek

Sam Electronic Circuits 1/02