Rangkaian Amplifier 8 Watt dari IC TDA2030

Rangkaian Amplifier 8Watt dari IC TDA2030 ini sangat sederhana, bisa untuk audio komputer anda atau radio juga media player dan lain lain. Untuk stereo anda tinggal membuat satu lagi rangkaian seperti ini.

Notes:
Although the TDA2030 is capable of delivering 20 watts of audio power, I deliberately reduced the output to about 8 watts to drive 10 watt speakers. This is more than adequate for a smaller room. Input sensitivity is 200mV. Higher input levels naturally will give greater output, but no distortion should be heard. The gain is set by the 47k and 1.5k resistors. The TDA2030 IC is affordable and makes a good replacement amplifier for low to medium audio power systems. Incidentally, it is speaker efficiency that determines how "loud" the sound is. Speaker efficiency or sound pressure level (SPL) is usually quoted in dB/meter. A speaker with an SPL of 97dB/m will sound louder than a speaker with an SPL of 95dB/m.

Source:  http://www.zen22142.zen.co.uk

Read More

High Quality Intercom

Skema Rangkaian Interkom Kualitas Tinggi

Kumpulan Skema Elektronika- Interkom Kualitas Tinggi. This circuit consists of two identical intercom units. Each unit contains a power supply, microphone preamplifier, audio amplifier and a Push To Talk (PTT) relay circuit. Only 2 wires are required to connect the units together. Due to the low output impedance of the mic preamp, screened cable is not necessary and ordinary 2 core speaker cable, or bell wire may be used.

The schematic can be broken into 34 parts, power supply, mic preamp, audio amplifierand PTT circuit. The power supply is designed to be left on all the time, which is why no on / off switch is provided. A standard 12 V RMS secondary transformer of 12VA will power the unit. Fuses are provided at the primary input and also secondary, before the rectifier. The 1 A fuse needs to be a slow blow type as it has to handle the peak rectifier current as the power supply electrolytics charge from zero volts.

The microphone amplifier is a 2 transistor direct coupled amplifier. BC108B transistors will work equally well in place of the BC109C transistors. The microphone used is a 3 terminal electret condenser microphone insert. These are popular and require a small current to operate. The preamp is shown in my audio circuit section as well, but has a very high gain and low distortion. The last transistor is biased to around half the supply voltage; this provides the maximum overload margin for loud signals or loud voices. The gain may be adjusted with the 10k preset. Sensitivity is very high, and a ticking clock can easily be heard from the distantloudspeaker.

The amplifier is based on the popular National Semiconductor LM380. A 50 mV input is all that's required to deliver 2W RMS into an 8 ohm loudspeaker. The choice of loudspeaker determines overall sound quality. A small loudspeaker may not produce a lot of bass, I used an old 8 inch radio loudspeaker. The 4.7u capacitor at pin 1 of the LM380 helps filter out any mains hum on the power supply. This can be increased to a 10u capacitor for better power supply rejection ratio.

The push to talk (PTT) circuit is very simple. A SPDT relay is used to switch between mic preamplifier output or loudspeaker input. The normally closed contact is set so that each intercom unit is "listening". The non latching push button switch must be held to talk. The 100u capacitor across the relay has two functions. It prevents the relays back emf from destroying the semiconductors, and also delays the release of the relay. This delay is deliberate, and prevents any last word from being "chopped" off.

Setting Up and Testing
This circuit does not include a "call" button. With this intercom pressing the Push to Talk button sends your voice to the opposite station, and vice versa. Setup is simple, set to volume to a comfortable level, and adjust the mic preset while speaking with "normal volume" from one meter away. You do not need to be in close contact with the microphone, it will pick up a conversation from anywhere in a room. If the units are a long way away, there is a tendency for the cable to pick up hum, or radio interference. There are various defenses against this. One way is to use a twisted pair cable, each successive turn cancels the interference from the turn before. Another method is to use a small capacitor of say 100n between the common terminal of each relay and ground. This shunts high frequency signals to earth. Another method is to use a low value resistor of about 1k. This will shunt interference and hum, but will shunt the speech signal as well. However as the output impedance of each mic preamp is low, and the speech signals are also low,this will have little effect on speech but reduce interference to an acceptable level.

Source:  www.zen22142.zen.co.uk 

Read More

Doorphone Intercom

Skema Rangkaian Interkom Pintu Sederhana

Description:

Kumpulan Skema Elektronika- Interkom Pintu Sederhana,

A simple Intercom made with a single transistor and low power audio amplifier LM386. The circui uses 8 ohm speakers, which also double as a microphone.

Circuit:
For the first time, this circuit was is a Canadian/English design and designed by Mr Laurier Gendron of Burnaby in British Columbia, Canada, and myself. Please make sure you visit Laurier's web site, Handy Dandy Little Circuits. This page is also available in French by clicking on the flag.


In this doorphone circuit, an 8 ohm speaker is used both as a microphone and also an output device. The BC109C stage amplifies in common base mode, providing low input impedance to match the speaker and good voltage gain.
The 270k resistor provides simple DC bias and the load resistor is 27k. The speaker produces a weak varying DC output when used as a microphone typically several 100uV. This varying DC signal must be separated from the fixed DC bias voltages and this is done by the 100u and 0.47u capacitors.
An LM386 is used in non-inverting mode as a power amplifier to boost voltage gain and drive the 8 ohm speaker. The 10k potentiometer acts as the volume control, and overall gain may be adjusted using the 5k preset. The gain of the LM386 can be as high as 200, this is required because of the small audio signal from the speaker. The double pole double throw switch, reverses the loudspeaker positions, so that one is used to talk and the other to listen. Manually operating the switch (from inside the house) allows two way communication.

Source:  www.zen22142.zen.co.uk

Read More

Rangkaian Power Amplifier 1000 Watt

Kumpulan Skema Elektronika. This is a audio power amplifier Blazer circuit provides up to 1000Watt . This interesting routes many good bass and treble alive. Importantly should choose Power supply source, which has been fairly high voltage class 70Vdc GND -70V 10A is the current low level

Skema Rangkaian Power Amplifier Blazer 1000 Watt

The transistors are 2SC3858 (NPN) and 2SA1494 (PNP), and feature high bandwidth, excellent safe operating area, high linearity and high gain. Driver transistors are 2SC5200 (NPN) and 2SA1943 (PNP). All devices are rated at 230V, with the power transistors having a 150W dissipation and the drivers are 50W.

This circuit describes an amplifier, power supply and tests procedures that are all inherently dangerous. Nothing described in this article should even be considered unless you are fully experienced, know exactly what you are doing, and are willing to take full 100% responsibility for what you do. There are aspects of the design that may require analysis, fault-finding and/or modification.

Read More

Skema Rangkaian 400W MOSFET Amplifier

Kumpulan Skema Elektronika. These amplifiers circuit can be used for virtually any application that requires high performance, low use Noise, distortion and excellent sound quality. Examples would be subwoofer amplifier should FOH stage Amplifiers, surround a canal a very powerful sound amplifier, etc. The 400W MOSFET-amplifier has four key stages of amplification. We are looking to start any Phase appropriate detail.

Skema Rangkaian 400W MOSFET Amplifier

Note:

• Use + /-70V 10A DC dual supply for powering the circuit.
• For L1 make 12turns of enameled copper wire on a 1cm him: plastic formers.
• use 8 x IRFP448 MOSFETs in the final stages
• Heat sink is Necessary for the MOSFETs. A 8x4x4 inch finned aluminum heat sink will do. There is no such thing as a heat sink That is too large.

As the name suggests All Q ,C and ZD the Bias and buffer phases. Its main goal is to provide a stable MOSFET Gates and offset voltage and the voltage buffer amplifier stage of the High Resource capacity. What would have without the phase response and the effect Slew rate is indeed very bad. The flip side of the coin is not the extra step Introduction of an additional dominant pole in the amplifier feedback loop.

Also to what the name suggests this stage converts the voltage developed in the VAS and provides all the amps required to drive at 8 or 4 ohms. 2-ohm loads are possible for several minutes at a time. In fact, I have tested more than 1600 1kW amplifier Watts RMS at 2 ohms. But that would not be recommended as a long-term exposure at all. If it is higher than the figures of the STI-amp. Power to the AV amplifier 800 The components of the power for this amplifier are as follows, and are favored A channel or a power module alone. 1 toroidal transformer with a rating of 1kVA. Primary windings are made to fit

Read More

Power Amplifier for Laptop

Usually, the audio output from a laptop’s built-in speakers is low. A power amplifier is required to get a high volume. Here is a simple circuit to amplify the laptop’s audio output. The circuit is built around power amplifier IC LA 4440 (IC1) and a few other components. LA4440 is a dual channel audio power amplifier. It has low distortion over a wide range of low to high frequencies with good channel separation. Inbuilt dual channels enable it for stereo and bridge amplifier applications.


In dual mode LA4440 gives 6 watts per channel and in bridge mode 19- watt output. It has ripple rejection of 46 dB. The audio effect can be realized by using two 6-watt speakers. Connect pins 2, 6 and ground of IC1 to the stereo jack which is to be used with the laptop. Assemble the circuit on a general-purpose PCB and enclose in a suitable cabinet. The circuit works off regulated 12V power supply. It is recommended to use audio input socket in the circuit board. Use a proper heat-sink for LA4440.

Read More

Skema Rangkaian Active Crossover Circuit

This alive Cantankerous over is adequately beeline forward. It consists of a absorber and two 3rd order, 18 dB per octave filters. One low canyon and the added high. The cantankerous over abundance is set at 2Khz and is advised for AEK’s 400watt per access PA/Keyboard Amp systems. Obviously alone one access is apparent here.
The band akin audio arresting enters the absorber area it is astern out of phase. This is to atone for
the filters which will alter the appearance afresh appropriately abiding the arresting to it’s able phase. The filters are more-or-less accepted low and aerial canyon filters appropriately however, added capacitors and resistors accept been added in adjustment to get the altruism bottomward to a minimum appliance alone E12 components.
This ambit may not be of awfully abundant use to anyone as it was accurately advised to clothing the applications. It is not capricious or switchable for two reasons. Firstly, it didn’t charge to be back the backdrop of the apostle arrangement were already known. And secondly, the added complication was put into the accurateness of the crossover rather than it’s flexibility. The filters are akin in account to anniversary added as able-bodied as can be accepted appliance alone E12 components. If switching were to be active to accord a ambit of abundance options, a accommodation would accept to be fabricated on clarify accuracy.
The alone added way to accomplish a accepted crossover architecture and advance accurateness would apparently be to use Switched capacitor clarify architecture blocks. In theory, two 18or 24dB per octave filters could be complete such that they tracked anniversary added by actuality bound to the aforementioned clock. This would be a nice agreement but I haven’t had the befalling to prove this technology for this affectionate of application. My primary affair was the breach through of switching babble appliance such a design.
Therefore this architecture represents the simplest access I could booty and still get the adapted outcome.

Read More

300W Subwoofer Power Amplifier Wiring Diagram

Please agenda that the blueprint for this amp has been upgraded, and it is now recommended for connected aerial ability into 4 Ohms, but You will charge to go to extremes with the heatsink (fan cooling is awful recommended). It was originally advised for “light” alternate duty, acceptable for an equalised subwoofer arrangement (for archetype application the ELF assumption – see the Project
Page for the advice on this circuit). Where connected aerial ability is required, addition 4 achievement transistors are recommended, active in the aforementioned way as Q9, Q10, Q11 and Q12, and application 0.33 ohm emitter resistors.
Continuous ability into 8 ohms is about over 150W (250W for ±70V supplies), and it can be acclimated after added transistors at abounding ability into an 8 ohm amount all day, every day. The added transistors are alone bare if you appetite to do the aforementioned affair into 4 ohms at best accumulation voltage! Do not alike anticipate about application food over ±70V, and don’t bother allurement me if it is ok – it isn’t!
The ambit is credible in Figure 1, and it is a analytic accepted design. Connections are provided for the Internal SIM (published abroad on the Project Pages), and clarification is provided for RF aegis (R1, C2). The ascribe is via a 4.7uF bipolar cap, as this provides lots of capacitance in a baby size. Because of the impedance, little or no abasement of complete will be apparent. A polyester cap may be acclimated if you adopt – 1uF with the nominal 22k ascribe impedance will accord a -3dB abundance of 7.2Hz, which is absolutely low abundant for any sub.

Read More

Rangkaian Loudness Aktif

Skema Rangkaian Loudness Aktif

To get good audio reproduction at different listening levels, a different tone-setting controls should be necessary to suit the well known behavior of the human ear. In fact, the human ear sensitivity varies in a non-linear manner through the entire audible frequency band, as shown by Fletcher-Munson curves.

A simple approach to this problem can be done inserting a circuit in the Preamplifier stage, capable of automatically varying the frequency response of the entire audio chain in respect to the position of the control knob,
in order to keep ideal listening conditions under different listening levels .

Fortunately, the human ear is not too critical, so a rather simple circuit can provide a Satisfactory performance through a 40db range.

List Component Of Loudness Aktif

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 63V Polyester Capacitor
C4______________15nF 63V Polyester Capacitor
C5,C9____________1µF 63V Electrolytic or Polyester Capacitors
C6,C8____________47µF 63V Electrolytic Capacitors
C7______________100pF 63V Ceramic Capacitor

IC1_______________TL072 Dual BIFET Op-Amp

SW1________________DPDT Switch (four poles for stereo)


The circuit is shown with SW1 in the "Control-flat" position, ie without the Automatic Loudness Control. In this position the circuit acts as a linear Preamplifier stage, with the voltage gain is set by means of Trimmer R7. Switching SW1 in the opposite position the circuit becomes an Automatic Loudness Control and its frequency response varies in respect to the position of the control knob by the amount shown in the table below. C1 boosts the low frequencies and C4 boosts the higher ones. Maximum boost at low frequencies is limited by R2; R5 do the same at high frequencies.

Read More

Rangkaian Mixer Mini

 Although the modular Portable Mixer design available on these web pages has become a hit for many amateurs, some correspondents required a much simpler device, mainly for mixing mono signals.
This design should fulfil their needs, featuring three inputs with switchable high/low sensitivity and unusual level-control circuits, providing high overload margins and low-noise figures, proportional to gain-level settings.
Low current consumption due to a simple, five-transistor circuitry, allows the Mini Mixer to be powered by a common 9V PP3 battery for many hours.

Mini Mixer Parts:
P1,P2,P3_________5K Linear Potentiometers
R1,R11,R15_____180K 1/4W Resistors
R2,R12,R16_______2M2 1/4W Resistors
R3,R13,R17_____750R 1/4W Resistors (See Notes)
R4,R14,R18_______1K 1/4W Resistors
R5______________15K 1/4W Resistor
R6_____________220R 1/4W Resistor
R7_______________1K5 1/4W Resistor
R8_____________820R 1/4W Resistor
R9_____________150R 1/4W Resistor
R10____________100K 1/4W Resistor
C1,C6,C8_________1µF 63V Polyester or Electrolytic Capacitors
C2,C4,C7,C9____100µF 25V Electrolytic Capacitors
C3,C5__________220µF 25V Electrolytic Capacitors
Q1,Q4,Q5______BC550C 45V 100mA Low noise High gain NPN Transistors
Q2____________BC547 45V 100mA General purpose NPN Transistor
Q3____________BC557 45V 100mA General purpose PNP Transistor
J1,J2,J3________3mm or 6mm Mono Jack sockets
SW1,2,3,4______SPST Toggle or Slider Switches
B1_______________9V PP3 Battery
Clip for PP3 Battery

Read More

Car Subwoofer Amplifier Driver

The stereo signals coming from the line outputs of the car radio amplifier are mixed at the input and, after the Level Control, the signal enters the buffer IC1A and can be phase reversed by means of SW1. This control can be useful to allow the subwoofer to be in phase with the loudspeakers of the existing car radio.
Then, a 12dB/octave variable frequency Low Pass filter built around IC1B, Q1 and related components follows, allowing to adjust precisely the low pass frequency from 70 to 150Hz.
Q2, R17 and C9 form a simple dc voltage stabilizer for the input and filter circuitry, useful to avoid positive rail interaction from the power amplifier to low level sections.
Parts List:
P1_____________10K Log Potentiometer
P2_____________22K Dual gang Linear Potentiometer
R1,R4___________1K 1/4W Resistors
R2,R3,R5,R6____10K 1/4W Resistors
R7,R8_________100K 1/4W Resistors
R9,R10,R13_____47K 1/4W Resistors
R11,R12________15K 1/4W Resistors
R14,R15,R17____47K 1/4W Resistors
R16_____________6K8 1/4W Resistor
R18_____________1K5 1/4W Resistor
C1,C2,C3,C6_____4µ7 25V Electrolytic Capacitors
C4,C5__________68nF 63V Polyester Capacitors
C7_____________33nF 63V Polyester Capacitor
C8,C9_________220µF 25V Electrolytic Capacitors
via: redcircuit
C10___________470nF 63V Polyester Capacitor
C11___________100nF 63V Polyester Capacitor
C12__________2200µF 25V Electrolytic Capacitor
D1______________LED any color and type
Q1,Q2_________BC547 45V 100mA NPN Transistors
IC1___________TL072 Dual BIFET Op-Amp
IC2_________TDA1516BQ 24W BTL Car Radio Power Amplifier IC
SW1____________DPDT toggle or slide Switch
SW2____________SPST toggle or slide Switch capable of withstanding
a current of at least 3A
J1,J2__________RCA audio input sockets
SPKR___________4 Ohm Woofer or two 8 Ohm Woofers wired in parallel

Read More

Guitar Amplifier Schematic Diagram 100W

The power amp board has remained unchanged since it was first published in 2002. It certainly isn’t broken, so there’s no reason to fix it. The photo below shows a fully assembled board (available as shown as M27). Using TIP35/36C transistors, the output stage is deliberately massive overkill. This ensures reliability under the most arduous stage conditions. No amplifier can be made immune from everything, but this does come close.
The power amp (like the previous version) is loosely based on the 60 Watt amp previously published (Project 03), but it has increased gain to match the preamp. Other modifications include the short circuit protection – the two little groups of components next to the bias diodes (D2 and D3). This new version is not massively different from the original, but has adjustable bias, and is designed to provide a “constant current” (i.e. high impedance) output to the speakers – this is achieved using R23 and R26. Note that with this arrangement, the gain will change depending on the load impedance, with lower impedances giving lower power amp gain. This is not a problem, so may safely be ignored.
Should the output be shorted, the constant current output characteristic will provide an initial level of protection, but is not completely foolproof. The short circuit protection will limit the output current to a relatively safe level, but a sustained short will cause the output transistors to fail if the amp is driven hard. The protection is designed not to operate under normal conditions, but will limit the peak output current to about 8.5 Amps. Under these conditions, the internal fuses (or the output transistors) will probably blow if the short is not detected in time.

Read More

Rangkaian Power Amplifier BTL

Gambar Rangkaian Power Amplifier BTL

Audio amplifiers operate either in a BTL (bridged) or single-ended ("normal") configuration. In the single-ended setup, the output lead goes to the "hot" or "+" side of the load (speaker or speaker box since we are talking audio) and the "-" or "negative" side of the load is tied to a common ground shared with the amplifier. In the BTL configuration, one amp is connected to the "+" side of the speaker (load) and a second amp is connected to the "-" side of the load. For this to work, the output signal from the second amplifier must be a "mirror image" (identical in every respect, but 180 degrees out of phase) of the output from the first amp. The BTL configuration is most often seen in low-voltage, battery-powered applications (like cell phones or "walkman" type personal tape or cd players etc) or in automotive applications over about 10 watts per channel.

In the BTL configuration, each amp drives half the load impedance. With the signals being out of phase, the voltage swing across the load appears to be doubled, and with each amp driving half the impedance the current is doubled. In theory the bridged pair will produce 4 times the power into the load that either amp acting alone could provide. In reality it seldom works that well.

This is an power amplifier circuit of a BTL system, which comprises a first op-amp chip which outputs an output signal having a same phase as an input signal input to a signal input terminal, a second operational amplifier which outputs an output signal having an opposite phase to the input signal, a voltage divider which generates a midpoint voltage of the input signal, a first resistor connected between an output terminal and a negative phase input terminal of the first operational amplifier, second and third resistors connected in series between the negative phase input terminals of the first and second operational amplifiers, a fourth resistor connected between an output terminal and the negative phase input terminal of the second operational amplifier, and an impedance converter connected between a midpoint voltage node of the voltage divider and a series-connection node of the second and third resistors. (end of abstract)

List Componet:
R1, R2,R3, R4, R6..................... 10kOhm.
R3............................................. 20kOhm.
C1, C2, C3, C4........................... 10µF.
Catu daya (VCC) ±12 V.

Read More

Rangkaian Treble boost

This is Treble Boost circuit. IC LM741 that excellent like to use general the price economizes , and use electronics other equipment assemble a little. In this circuit has can to improve the treble about 10000 Hz that 40 dB. By you can change C1 be other value as a result , will affect the treble differently. This circuit uses the fire feeds about 9V. See the circuit and read to add.

Skema rangkaian treble boost

Note:

• Use 12V to 16 VDC for powering the circuit.
• Mount IC1 on a holder.
• C3,C3,c4 and C5 must be rated at least 25V.

IC Op-Amp LM741

The LM A741 is a high performance monolithic operational amplifier constructed on a single silicon chip. It is intented for a wide range of analog applications.




Absolute maximum rating

Supply voltage (VCC) ±22 V.
Differential Input Voltage (Vid ) ±30 V.
Input Voltage (Vi ) ±15 V.
Power Dissipation (Ptot) 500 mW.
Storage Temperature Range (Tstg) -65 to +150 °C.

Read More

20 Watt Power Amplifier

This IC chip was designed specifically for use in power boosting applications in automobiles. It is self protecting against short circuits and thermal problems. In the bridge configuration shown it will deliver 20 watts of power into a 2 ohm speaker operating at 14.4 volts.

Read More

Sound Level Meter

This is circuit can be used to check the sound levels.The sound pressure meter is vey useful in setting up home theater systems , if you need to test the sound pressure of each channels on different positions in the room.

The circuit is nothing but a non- inverting amplifier based on op-amp CA 3140. The sound picked by the condenser mic will be amplified by the IC1 and rectified by the bridge D1 to drive the meter M1. The deflection on the meter will be proportional to the pressure of the sound falling on the mic.The switch S1 can be used as an ON/OFF switch.

Skema rangkaian sound level meter

Note:

• The bridge D1 can be a 1A bridge.If 1A bridge is note available,make one using four 1N4007 diodes.
• The circuit ca be powered by using a 9V PP3 battery.

Pin IC CA3140

The IC CA3140 is integrated circuit operational amplifiers that combine the advantages of high voltage PMOS transistors with high voltage bipolar transistors on a single monolithic chip.

Features

• Very High Input Impedance (ZIN) -1.5TΩ (Typ)
• Very Low Input Current (Il) -10pA (Typ) at ±15V
• Wide Common Mode Input Voltage Range (VlCR) - Can be Swung 0.5V Below Negative Supply Voltage Rail
• Output Swing Complements Input Common Mode Range
• Directly Replaces Industry Type 741 in Most Applications
• Pb-Free Plus Anneal Available (RoHS Compliant).

Read More

Sub-Woofer Amplifier 100 Watt

This is the circuit of subwoofer amplifier. This amplifier can produce an output of 100Watt. There are seven transistors including four in the output stage. The transistors Q1 and Q2 form the preamplifier stage. Transistors Q4 to Q7 form the output stage. Since no ICs are used the circuit is very robust and can be easily assembled on a general purpose PCB.

Skema rangkaian 100 watt sub-woofer amplifier

Note:
Use powered a +35V/-35V, 5A dual power supply.
All electrolytic capacitors must be rated 100V.
The transistor Q4 to Q7 must be fitted with heat sinks.


Transistor 2N3773 and 2N6609

Transistor 2N3773 (NPN) and (PNP) 2N6609 are PowerBase_ power transistors designed for high power audio, disk head positioners and other linear applications. These devices can also be used in power switching circuits such as relay or solenoid drivers, DC−DC converters or inverters.


Features Transistor 2N3773

Pb−Free Packages are Available
High Safe Operating Area (100% Tested) 150 W @ 100 V
Completely Characterized for Linear Operation
High DC Current Gain and Low Saturation Voltage
hFE = 15 (Min) @ 8.0 A, 4.0 V
VCE(sat) = 1.4 V (Max) @ IC = 8.0 A, IB = 0.8 A
For Low Distortion Complementary Designs


MAXIMUM RATINGS Transistor 2N3773

Collector − Emitter Voltage: 140 Vdc
Collector − Emitter Voltage: 160 Vdc
Collector − Base Voltage:160 Vdc
Emitter − Base Voltage: 7 Vdc
Collector Current Continuous: 16 Adc
Base Current Continuous 15 Adc
Total Power Dissipation : 150 Watt.

Read More

Rangkaian Pre-Amp Spul Gitar

This is a pre-amp guitar circuit suitable for high impedance type electric guitar pickups. The circuit is based on a uA 741 op-amp (IC1). The IC1 is wired as a non-inverting amplifier. Resistor Variable R1 can be used as a volume controller. Resistor Variable R6 can be used as tone controller. The switch S1 is used to produce “brilliant” or “soft” tonal effects.

Skema Rangkaian Pre-Amp Spul Gitar

Description Op-Amp UA741

The UA741 is a high performance monolithic operational amplifier constructed on a single silicon chip. It is intented for a wide range of analog applications.

* Summing amplifier
* Voltage follower
* Integrator
* Active filter
* Function generator

The high gain and wide range of operating voltages provide superior performances in integrator, summing amplifier and general feedback applications. The internal compensation network (6dB/ octave) insures stability in closed loop circuits.

Data max Ic UA741

* Symbol Parameter UA741M UA741I UA741C Unit
* Supply voltage (VCC) ±22 V
* Differential Input Voltage (Vid ) ±30 V
* Input Voltage (Vi ) ±15 V
* Power Dissipation (Ptot) 500 mW
* Storage Temperature Range (Tstg) -65 to +150 °C.

Read More

Rangkaian Audio Mixer 3 Input

Many audio mixer circuits have been published but this this very simple audio mixer circuit uses only one transistor. The base emitter junction of the transistor is biased by the diodes D1 and D2.The signals to be mixed are directly coupled to the base of Transistor. Each input lines are current limited by using a 10k Potensiometer . With the used component values the collector current is around 1mA.

Skema Rangkaian Audio Mixer 3 Input

Notice:

• The circuit can be assembled on a Vero board.
• The circuit can be powered from 9-25V DC.
• of each channel can be set using Variable resistor 10k

Transistors in the following series is enabled as a source of constant flow. By providing input audio signal on the emitter, the voltage on the emitter will fluctuate, which will cause the collector voltage also fluctuates. The amount of frequency fluctuation is comparable with the frequency of the incoming audio signal.

Read More

Skema Power Amplifier 2N3055

Skema Rangkaian 2N3055 Power Amplifier

Amplifier power is a series of electronics that is used to strengthen the power (or energy in general). In the field of audio, amplifier will amplify the sound signal (which has been expressed in the form of electric current) on the input it into electric current is stronger at the output. The amount of strengthening is often known by the term gain. Value of the gain is expressed as a function of frequency is called the transfer function.

So the gain is the result of the power output (Pout) and power at the input to its function in the form of frequency. The size of the gain, (G) is usually the Decibel (dB).

Skema 2N3055 Power Amplifier. The optimal supply voltage is around 30V, but this amp work from 24 to 32V. The maximal input voltage is around 0.8 - 1V. As you can see, in this design the components have a big tolerance, so you can build it almost of the components, which you find at home. The and transistors can be any NPN type power transistor, but do not use Darlington types. The output power is around 150 Watt.

Amplifier schematic:

capacitor C1 regulates the low frequencies (bass), as the capacitance grows, the low frequncies are getting louder.

capacitor C2 regulates the higher frequencies (treble), as the capacitance grows, the higher frequencies are getting quiter.

this is a class B amplifier, this means, that a current must flow through the end transistors, even if there is no signal on the input. This current can be regulated with the 500Ω trimmer resistor. As this current incrases, the sound of the amplifier gets better, but the end transistors are more heating. But if this current decrases, the transistors are not heating so much, but the sound gets worse.

Read More