Sunday, September 21, 2014

Amplifier simple easy and cheap with IC TA7368P

Indeed , this amplifier is suitable known as the title above. Viewed from the schematic alreaady seen that this amplifier circuit requires little components and parts were cheap. This amplifier requires 1 piece of IC TA7368P is manufactered by TOSHIBA is the price too low, then in addition to IC amplifier requires 3 components elco capacitor whose value is not too big. Maybe if you make this amplifier circuit, the total price of all must not be more than $ 1. This amplifier only has more than 1W output, perhaps because it has little strengthening it so that the output is released is very small. But to make this is quite easy and not too costly.

Part List :

Capacitor
C1 = 100 uF
C2 = 100uF
C3 = 470uF

IC
IC1 = TA7368P

Good Luck :)

Saturday, September 20, 2014

Explanation Fuse Box Chevrolet Corsica 1992 Diagram

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Fuse Box Chevrolet Corsica 1992 Diagram

Fuse Panel Layout Diagram Parts: fuel injector, stop light, hazard light, radio, air bag, ignition coil, stop light, alternator, anti lock brake, back up light, turn signal lamp, trunk release, cigar lighter, parking light, side marked light, license light, heater, air conditioner, warning indicator, rear window defogger, windshield wiper/washer, trunk release, radio CD, power window, rear window defogger, autoatic door unlock.

Fuse Box BMW Z3 Roadster 1998 Diagram

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Fuse Box BMW Z3 Roadster 1998 Diagram

Fuse Panel Layout Diagram Parts: auxiliary fuse box,. high beam light relay, crash control module, fuel pump relay.

Fuse Box Toyota 1999 Corolla CE Diagram

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Fuse Box Toyota 1999 Corolla CE Diagram

Fuse Panel Layout Diagram Parts: window defogger, power window, noise filter, taillight control relay, integration relay, turn fuse, gauge fuse, wiper, ECU ignition fuse, stop lamp fuse, taillight fuse, door fuse, steering fuse, cigar lighter.

Wiring Diagrams

Bridged
Bridging an amplifier is a means of combining the power of two channels to drive one speaker.

Typically this will double the power of a single channel (i.e. two 50 watt channels would combine to become one 100 watt channel) although some of the top amplifiers will actually quadruple the power of a single channel (i.e. two 50 watt channels would combine to become one 200 watt channel). This is usually the most desirable and you can plan this into your overall design. For example, if you have two subwoofers in your system and you want to drive each of them with 100 watts you can do one of the following.

Parallel

Parallel wiring involves wiring each speaker positive terminal to the positive speaker output of the amplifier and likewise the negative speaker terminals are wired to the negative speaker output of the amplifier.

Series

Series wiring involves connecting the amplifiers positive terminal to the positive terminal of the first speaker and then connecting the negative terminal of the first speaker to the positive terminal of the second speaker and so on. The final speaker in the chain will have its negative terminal connected to the negative terminal of the amplifier. See the figure below. This wiring scheme is best reserved for multiple subwoofers because any audio artifacts (distortion, frequency attenuation, etc.) caused by the first speaker(s) in the chain will affect the speakers in the chain after it. This is a major problem when mixing multiple speaker types (i.e. woofers with tweeters).

Capacitors

There is often a lot of confusion on how to wire a car audio capacitor (a.k.a. power capacitor or stiffening capacitor). There are two terminals on a car audio capacitor. A positive and a negative. The negative terminal is connected to ground. The positive terminal is connected "in-line" with the car audio amplifier +12 volts terminal. See the diagram below.

Ideally the power capacitor should be as close as possible to the amplifier. Within a couple of feet is acceptable.

Charging

Heres how to wire two capacitors in a system:

NOTE OF CAUTION: Power capacitors store a large amount of energy and they charge very quickly. You must first "charge" your power capacitor using a resistor before connecting it directly to +12 volts. This is done with the a 1k ohm resistor and a voltmeter. The exact value of the resistor is not critical but I would keep it in the 500-1k ohm range. I would recommend getting a 1 watt resistor if possible (your capacitor may have come with a resistor for charging). A lower wattage resistor will heat up too quickly. Also, do not hold the resistor with your bare hand. The current flowing through the resistor will cause the resistor to heat up and you could be burned. A good place to put the resistor is in the main power wire fuse holder. Simply substitute the resistor for the fuse. A diagram for the capacitor charging setup is shown below. You will need to place a voltmeter across the capacitor to monitor the voltage. Once the voltmeter reads 12 volts you can remove the voltmeter and replace the resistor with the power fuse.

Friday, September 19, 2014

LM317 Variable DC Power Supply

LM317-Variable DC Power Supply Circuit diagram :

This power supply is based on the LM317 Variable Regulator. The input of the regulator needs to be around 28 Volts DC and it will output a DC voltage from 1.25vdc to 25 vdc. To adjust the output voltage simply turn the 5k ohm pot. The regulator will supply 1.5 amps of current.

Hot Fox Hunt Transmitter Circuit Diagram

http://www.open-circuit.co.uk/pic/tro2dia.gif

If the U1 output is “0″, transistor T3 is off and the transmitter is also off. On the other hand, if the U1 output is “1″, transistor T3 is on and the transmitter is on. During the “1″ period, gate U2 generates a square wave signal with a frequency form 0.1 to 1Hz. Gate U3 works as an inverter only. It determines whether gate U4 generates a 1KHz signal or not. A periodic burst signal is now present at the gate FET T2 to modulate the transmitter used at foxhunt.

Calibration of the foxhunt transmitter: Adjust the three trimmer capacitors to produse a maximum signal amplitude at the output.

Coil Data:
L1 = 470 nH
L2 is made of 5 windings of 0.8mm copper wire, 8 mm winding diameter. It is tapped at the first winding from the ground.

L3 is made of 0.8mm copper wire, 8mm winding diameter, 3 windings at the FET side and 2 windings at the antenna side. Adjust the coupling between the two windings sides to get a maximum signal output amplitude.
The circuit can be powered with a 9 volt battery. It consumes around 20mA only.

Fox Hunt Transmitter Active Components.

T1 = 2SA256
T2 = 3N205
U1, U2, U3, U4 = IC1 = 4093

Fuse Box Ford 2008 F150 Passenger Compartment Diagram

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Fuse Box Ford 2008 F150 Passenger Compartment Diagram

Fuse Panel Layout Diagram Parts: Brake shift interlock solenoid, Fog lamp relay, Electrochromatic mirror, Heated seats, BSM, Compass, RSS (Reverse Sensing System), Power Rail, Delayed accessory power for audio, Run/Accessory Wipers, Instrument cluster, Audio for XL/STX, Parklamps, Body Security Module (BSM), Instrument Panel Illumination, Radio (Start signal), Heated Mirros, Switch Indicators, Fuel Pump Relay, Fuel Injectors, Injector Sense, Trailer Tow back up Lamps relay, Trailer tow parklamp relay, A/C Clucth, 4×4 solenoid, PCM relay coil, Climate control module power, Flasher relay, Back up lamp and Dyatime Running Lamps (DRL) relay coil, A/C pressure switch, Redundant speed control switch, Heated PCV (5.4L). ABS, Overdrive cancel, Memory seats and pedals. DVD battery power, Power fold mirror, Keep alive memory for Powertrain Control Module (PCM) and Climate Control Module, Cluster, Battery saver power for demand lamps, Cluster airbag warning lamp, Vapor Management Valve (VMV), A/C clucth relay, Canister vent, Heated Exhaust Gas Oxygen (HEGO) sensors # 11 and # 21, Stop/Turn Lamps, ABS, T/T electric brake module, PCM (BOO signal), turn signal mirros, CHSML, Power Mirrors, Variable Cam Timing (VCT), Heated Positive Crankscase Ventilation (PCV) valve (4.2L engine), CID sensor (4.2L engine), 4.6L/4.2L, EGERFlex fuel, power door lock switch and moon roof switch illumination, CMCV, Mass Air Flow (MAF) sensor, Passenger Airbag Deactivation (PAD) warning lamp.

Thursday, September 18, 2014

Converting a DCM Motor

We recently bought a train set made by a renowned company and just couldn’t resist looking inside the locomotive. Although it did have an electronic decoder, the DCM motor was already available 35 (!) years ago. It is most likely that this motor is used due to financial constraints, because Märklin (as you probably guessed) also has a modern 5-pole motor as part of its range. Incidentally, they have recently introduced a brushless model. The DCM motor used in our locomotive is still an old-fashioned 3-pole series motor with an electromagnet to provide motive power. The new 5-pole motor has a permanent magnet.

We therefore wondered if we couldn’t improve the driving characteristics if we powered the field winding separately, using a bridge rectifier and a 27 Ω current limiting resistor. This would effectively create a permanent magnet. The result was that the driving characteristics improved at lower speeds, but the initial acceleration remained the same. But a constant 0.5 A flows through the winding, which seems wasteful of the (limited) track power. A small circuit can reduce this current to less than half, making this technique more acceptable. The field winding has to be disconnected from the rest (3 wires).

Converting

A freewheeling diode (D1, Schottky) is then connected across the whole winding. The centre tap of the winding is no longer used. When FET T1 turns on, the current through the winding increases from zero until it reaches about 0.5 A. At this current the voltage drop across R4-R7 becomes greater than the reference voltage across D2 and the opamp will turn off the FET. The current through the winding continues flowing via D1, gradually reducing in strength. When the current has fallen about 10% (due to hysteresis caused by R3), IC1 will turn on T1 again. The current will increase again to 0.5 A and the FET is turned off again. This goes on continuously.

The current through the field winding is fairly constant, creating a good imitation of a permanent magnet. The nice thing about this circuit is that the total current consumption is only about 0.2 A, whereas the current flow through the winding is a continuous 0.5 A. We made this modification because we wanted to convert the locomotive for use with a DCC decoder. A new controller is needed in any case, because the polarity on the rotor winding has to be reversed to change its direction of rotation. In the original motor this was done by using the other half of the winding. There is also a good non-electrical alternative: put a permanent magnet in the motor. But we didn’t have a suitable magnet, whereas all electronic parts could be picked straight from the spares box.

7 Watt Audio Amplifier Using TDA2003

Amplifier Circuits Diagram

Schematic diagram of a simple 7 watt audio amplifier using TDA2003 Amplifier IC. This is a good IC with many built in features like low harmonic distortion, short schema protection,thermal overload protection etc. This IC is a upgrade version of TDA 2002 amplifier IC.

7 Watt Audio Amplifier Circuit Diagram :

7W-audio-amplifier-schema-Diagram

The schema is small and using only few components and it is able to deliver 7w output on 12V DC. Assamble the schema on PCB or veroboard and use heatsink with IC. Input voltage can be between 8 to 18 volt / 0.5A DC.

Car audio amplifier with IC TA7203P

Circuit Diagram

Car audio amplifier with IC TA7203P

Circuit Description

Stereo car power amplfier with TA7203P , is suitable for the room your car , your car it will build an increasingly crowded and felt like using high-class amplifiers and speakers. Simply using this circuit and some speaker subwoofer speakers you can enjoy it.

Technical information :

Max voltage = 20 Volt
Min voltage = 8 Volt
Max output = 2 x 40 Watt
RL = 8 Ohm

Mercedes Explanation Fuse Box Years Benz R170 Diagram

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Fuse Box Mercedess Benz R170 Diagram

Fuse Panel Layout Diagram Parts: garage door opening signal, control unit, child seat recognition system, indicator, exterior mirror adjustment, roof light, horn, anti theft alarm, trunk light, ignition coil, washer liquid heater, washer nozzle heater, sound booster, power window, seat adjustment, hydraulic unit, control locking, cigar lighter, glove compartment light, seat heater, instrument cluster, circulating air.

2 KICKER SOLO X on 5 000 WATTS!!!

Wednesday, September 17, 2014

BASIC ELECTRIC AND MAGNETIC CIRCUITS

Power and energy are two terms that are often misused. Energy can bethought of as the ability to do work, and it has units such as joules or Btu. Power, on the other hand, is the rate at which energy is generated or used, and therefore it has rate units such as joules/sor Btu/h. There is often confusion about the units for electrical power and energy. Electrical power is measured in watts, which isarate(1J/s=1 watt), so electrical energy is watts multiplied by time—for example, watt-hours.

Be careful not to say”watts per hour,”which is incorrect (eventhoughyou will see this all too often in newspapers or magazines). When a battery delivers current to a load, power is generated by the battery and is dissipated by the load. We can combine (1.1) and (1.2) to find an expression for instantaneous power supplied, or consumed, by a component of a circuit. The key electrical quantities already introduced and the relevant relationships between these quantities are summarized in Table 1.1. Since electrical quantities vary over suchalargerange of magnitudes, you will often find yourself working with very small quantities or very large quantities.

Click here to Download BASIC ELECTRIC AND MAGNETIC CIRCUITS

Night Rider 16 Stage Bi Directional LED Sequencer circuit

This bi-directional LED sequencer schema uses IC CD4516 and IC 74HCT138 as counter and decoder.

Circuit explanation:
The bi-directional sequencer uses a 4 bit binary up/down counter (CD4516) and two "1 of 8 line decoders" (74HC138 or 74HCT138) to generate the popular "Night Rider" display. A Schmitt Trigger oscillator provides the clock signal for the counter and the rate can be adjusted with the 500K pot. Two additional Schmitt Trigger inverters are used as a SET/RESET latch to control the counting direction (up or down). Be sure to use the 74HC14 and not the 74HCT14, the 74HCT14 may not work due to the low TTL input trigger level. When the highest count is reached (1111) the low output at pin 7 sets the latch so that the UP/DOWN input to the counter goes low and causes the counter to begin decrementing. When the lowest count is reached (0000) the latch is reset (high) so that the counter will begin incrementing on the next rising clock edge. The three lowest counter bits (Q0, Q1, Q2) are connected to both decoders in parallel and the highest bit Q3 is used to select the appropriate decoder.

source: http://www.qsl.net/yo5ofh/hobby%20diagram/led_diagram.htm

Ultrasonic Dog Whistle

Its well known that many animals are particularly sensitive to high-frequency sounds that humans cant hear. Many commercial pest repellers based on this principle are available, most of them operating in the range of 30 to 50 kHz. My aim was, however, to design a slightly different and somewhat more powerful audio frequency/ultrasonic sound generator that could be used to train dogs. Just imagine the possibilities - you could make your pet think twice before barking again in the middle of the night or even subdue hostile dogs (and I guess burglars would love that!).

From what Ive read, dogs and other mammals of similar size behave much differently than insects. They tend to respond best to frequencies between 15 and 25 kHz and the older ones are less susceptible to higher tones. This means that an ordinary pest repeller wont work simply because dogs cant hear it. Therefore, I decided to construct a new circuit (based on the venerable 555, of course) with a variable pitch and a relatively loud 82 dB miniature piezo beeper.

The circuit is very simple and can be easily assembled in half an hour. Most of the components are not really critical, but you should keep in mind that other values will probably change the operating frequency. Potentiometer determines the pitch: higher resistance means lower frequency. Since different dogs react to different frequencies, youll probably have to experiment a bit to get the most out of this tiny circuit. The circuit is shown below:

Ultrasonic Dog Whistle Circuit diagram

Despite the simplicity of the circuit, there is one little thing. The 10nF (.01) capacitor is critical as it, too, determines the frequency. Most ceramic caps are highly unstable and 20% tolerance is not unusual at all. Higher capacitance means lower frequency and vice-versa. For proper alignment and adjustment, an oscilloscope would be necessary. Since I dont have one, I used Winscope. Although its limited to only 22 kHz, thats just enough to see how this circuit works.

There is no need to etch a PCB for this project, perf board will do. Test the circuit to see how it responds at different frequencies. A 4k7 potentiometer in conjunction with a 10nF (or slightly bigger) capacitor gives some 11 to 22kHz, which should do just fine. Install the circuit in a small plastic box and if you want to, you can add a LED pilot light. Power consumption is very small and a 9V battery should last a long time. Possible further experimentation:

Im working on an amplified version of the whistle to get a louder beep. All attempts so far havent been successful as high frequency performance tends to drop dramatically with the 555. Perhaps I could use a frequency doubler circuit - I just dont know and Ive run out of ideas. One other slightly more advanced project could be a simple "anti-bark" device with a sound-triggered (clap) switch that sets off the ultrasonic buzzer as soon as your dog starts to bark.

Fuse Box Ford 1997 350 Cube Diagram

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Fuse Box Ford 1997 350 Cube Diagram

Fuse Panel Layout Diagram Parts: Electronic Brake, power seat, power lumbar seat, blower motor relay, trailer back up lamp relay, trailer running lamp relay, plug in diode, fuel pump relay, trailer bettery charger relay, trailer adapter battery feed, turn/stop lamp, ignition switch, auxilliary , A/C heater, remote keyless entry module, modified vehicle power, powertrain control module, PCM power relay, trailer running lamp, DRL module, horn relay, hood lamp, main lgiht switch, ignition system, insturment cluster, P/A engine, 4WABS relay.

Tuesday, September 16, 2014

Fuse Box BMW Z4 Coupe 2007 Diagram

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Fuse Box BMW Z4 Coupe 2007 Diagram

Fuse Panel Layout Diagram Parts: low beam headlight, lighting circuit, high beam headlight, brake light, side light, turn indicator, interior and luggage, air bag, ASC/DSC, CD charger, central locking system, cigar lighter.

Fuse Box Toyota 1998 Camry Diagram

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Fuse Box Toyota 1998 Camry Diagram

Fuse Panel Layout Diagram Parts: daytime running light, high current, Head relay, EFI relay, engine main relay, COS fuse, main fuse.

60W ICs amplifier with OM961

Amplifier circuit is very suitable for use in car audio speakers that use a subwoofer, with a power output of about 60W and impedance of 4 Ohm. Supply voltage ranging from 12V to 35 volts with currents +, -, and ground. If using battery then use 12V DC to DC converter which produces 3 voltage +, -, and ground.

Guitar Circuit with built in speaker

The idea to make a guitar with a built-in speaker came when I stumbled upon a fact that if I miss a pulse through the speaker, it will be heard far away.

Recall manual siren. Human hand, twisting it develops 0.1 horsepower, this is where it is 100 watts (RMS), and heard it on the entire city.Flashlight compared with 1500 Watt PMPO 1000W RMS projector brightness turned this flashlight shines brighter and more, even though there was a light bulb 5 watts RMS. Similarly, energy saving light bulbs, written on them two 100 watts and 8 watts. But this retreat. Also on imported musical instrument in writing all power PMPO.

So, if the distortion of the sound spectrum converted to a pulse with a large buildup of small capacitors and alleviate sinus large capacitors, then turn out so when mixed. Promoduliruyutsya under sinusoidal pulses, acquiring the height of its envelope. Pulses will hear anything away, because of their large growth. But due to the fact that they will have different heights under sinus, they will be perceived by the human ear differently, carrying information about the full spectrum of sound.

This transformation into pulses and sine and mixing occurs on a chip amplifier effective D2 (the chip I can not seem to pick up for this part, so did its own microassembly until painted, because it developed). Coefficient PMPO this chip gives the coefficient 300. That is, when consumption of battery power amplifier crown 0.8 watts (RMS) guitar gives out 240 Watts PMPO volume.

Scheme guitar with built-in speaker:

It is known that it is necessary for restaurants 100 watts to 300 watts shift halls (power amplifier goes 1 Watt RMS) for concert 1000 watt (power amplifier here goes 3.3 watts RMS). Coefficient PMPO 300 guitar can do it.

This part of the effective amplifier with limiting diodes D2 purely mine. The first part of the effective amplifier, tone and preamp made by conventional schemes. Power Amplifier taken from Marshall amp already built up a guitar at a frequency of 50 to 13,500 Hz. Did not want to reinvent the wheel.

The third chip preamplifier (preamp), stands for alignment voltage DC tone, if it comes to it a little, as well as for the formation of overdrive. If humps AFC voices raised high, they begin to be limited, there is an increase in their growth, rather than amplitude. Intermediate frequencies are soft, not isolated and then there is no loss spectrum and volume control on the ear remains.

D2 tuned to the frequency 1700 - 2200 Hz and generates downs 100 to 3500-4500 Hz. Input from 2 to 5 millivolts it does not distort.

Frequency obstructions on different chains, plus a capacitor input impedance or resistance, etc. I want to calculate, but a book with formulas passed back to the Institute, it is necessary to take it again. While doing the ear, with observations from other circuits and devices.Infringement at low frequencies not, because it is necessary for the effects of sound from 100 Hz, body volume allows guitars to make them.

The sound of this scheme, because such characteristics can be confused with the sound of bands such as Disi Asay, Metallica, Gaunz Roses, Kiss, Bon Jovi. It all depends on the setting of D2, and can be customized to fit our music. It adjusts for distoshn, drive, metal, electrical, acoustic, mixed. Channels are made entirely only without amplifier and the first part of the amplifier efficiently. In the diagram this channel is highlighted with a blue border.

That makes guitars with a slightly shorter scale length with pegs on the other side, that would have been smaller sizes. I think the small size would blend well with a large capacity.

Monday, September 15, 2014

Low power switching regulator

This circuit is a simple battery-powered switching regulator provides 5V out from a 9V source with 80% efficiency and 50-mA output capability. When Q1 is oon , its collector voltage rises , forcing current trhough the iinductor. The output voltage rises , causing A1s output to rise . Q1 cutts off and the output drops low enough for A1 to turn Q1. The 1 uF capacitor ensures low battery impedance at high frequencies , preventing sag during switching. See schematic diagram below :

Explanation Fuse Box Chevy Truck V8 Instrument Panel 1995 Diagram

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Fuse Box Chevy Truck V8 Instrument Panel 1995 Diagram

Fuse Panel Layout Diagram Parts: Cruise Module, Cruise Activator Switch, Power Outlets, Diesel Fuel Pump, DERM ECM (Air Bag), PCM, License Plate Light, Park Lamps, Courtesy Lamps, Cargo Lamp, Glove Box Light, Power Mirrors, Dome/Reading Lamps, Vanity Mirrors, DRL Relay, DRL Module Buzzer, Rear Liftglass, Indicator Lamp, Cluster, HVAC Controls, Chime Module, Radio Illumination, Instrument Panel Switches, RR HVAC Controls, ABS, Cruise, Auto Transmission, Speedometer, Check Gauges, Tell Tale, Front Axle Actuator, 4WD Indicator Lamp, TP2 Relay, Hour Meter, Power Door Lock, Tail Lamps, Ashtray Lamp, Door Switch Illumination, Headlight ON Warning, Headlamp Switch, Keyless Entry, Cluster/Gauges, Low Coolant Module, Convenience Center Electrochromatic Rearview Mirror with Compass, Rear HVAC Controls, Washer/Wiper, Blower, HVAC Indicator Lamp, A/C Compressor, Mode/Temp/Air In Actuator, High Blower Relay, Transfer Case, Cigar Lighter, Power Amplifier, Door Lock Relay, Power Lumbar Seat, Side Marker Fog Lamp Relay, Clearance Lights, Heater & A/C Illumination, Windshield Stop lamp, Switch, Hazard Flasher, Seat Belt Reminder, Stoplights, CHMSL (Center High Mounted Stop Light), Transfer Case, 6 Way Power Seat, Keyless Entry Module.

Basic Low Pass Filter

Low pass filter is a low-pass filter with low frequency signals but attenuates (reduces the amplitude of) signals with frequencies higher than cutoff frequency. The actual amount of damping for each frequency varies from filter to Filtering.

Microphone amplifier

The preamplifier amplifies the output signal of a microphone, so that it can be. The further amplified by a power amplifier The circuit provides an output signal line. With two transistors, it is not difficult to build such a circuit. The amplifier produces little noise. In the shown embodiment, the circuit is suitable for microphones 500 and 600 Ω. 200 Ω R1 microphones should be reduces to 220 Ω and C1 should be increased to 4.7 uF. The gain is set by R2. If the average declared value of 22 K? Can be used. The maximum gain is about 200times.

R1 = 470 Ω
R 2 = 22 K?
R3 = 12 K?
R4 = 47 k
R5 = 820 Ω
R6 = 100 Ω
R7 = 1 k
R8 = 100 k
C1, C4 = 2.2 V μF/16
C2 = 47 V μF/16
C3 = 470 nF
T1 = BC 549C
T2 = BC 547B

Sunday, September 14, 2014

Explanation Fuse Box Chevrolet Tahoe 2005 Diagram

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Fuse Box Chevrolet Tahoe 2005 Diagram

Fuse Panel Layout Diagram Parts: radio, rear seat audio enable signal, FM composite signal, speaker output, level audio signal, battery positive voltage, radio or signal, antenna enable signal, instrument panel lamp, ground.

TA8210AH car audio amplifier circuit

IC TA8210AH By using this you can apply a series of audio power amplifier is the car audio system. In general, all the speakers in the car using a subwoofer speaker, and woofer. Because the car is not big room so the sound is being required is not too high.

Preamp Tone Control Circuit

This is a preamp and tone control which combined in in one schema.
P1 to control the volume level, P2 to control Bass level and P3 to control Treble level.

This is a mono channel schema, build another equal schema to make this schema stereo.

Component:


R1__________220K
R2__________100K
R3__________2K7
R4,R5_______8K2
R6__________4K7
R7,R8,R13___2K2
R9__________2M2
R10,R11_____47K
R12_________33K
R14_________470R
R15_________10K
R16_________3K3

C1,C2,C9____470nF 63V Polyester Capacitors
C3,C4_______47nF 63V Polyester Capacitors
C5,C6_______6n8 63V Polyester Capacitors
C7__________10µF 63V Electrolytic Capacitor
C8,C10______22µF 25V Electrolytic Capacitors
C11_________470µF 25V Electrolytic Capacitor

Q1,Q3_______BC550C 45V 100mA Low noise High gain NPN Transistors
Q2__________2N3819 General-purpose N-Channel FET

Power amplifier compatible with TV audio

In this amplifier circuit using IC TDA8944J as the main amplifier with dual-channel audio amplifier with 2 x 7W output power at 8 Ω impedance. And a minimum supply voltage of 9-18 Volts. In this ic contains two Bridge Tied Load or BTL amplifier.

The circuit is often found in audio amplifier in a series of television, besides TDA2003, TDA2006 and so forth. PCB for a series of amplifiers using IC TDA8944J is very compatible with all other types of IC in IC TDA894X family unit , and below is a schematics.

Saturday, September 13, 2014

TDA7375 Audio Amplifier 2x35W

TDA7375 general description:

Circuit of quadruple audio amplifier using integrated circuit TDA7235 for systems surround. Circuit of quadruple amplifier for systems surround using the ci tda7375, for potency of 7 watts for channel in the version amplifying quad or 15 watts in the dual version (stereo). could arrive to 35 watts in the version.TDA7235 is a circuit integrated amplifier quadruple audio amplifier class AB capable to work in double bridge or simple quadruple amplifiers, circuit integrated with protection system of short, it requests the minimum of external components, available in multiwat 15H (TDA7375H) and multiwat 15V (TDA7375V). Although the first conception went to automotives pplications , to give him/it in a great variety of applications of low potency. That integrated circuit is ideal in the situation in that is wanted a reasonable potency and with a Power tension relatively low for your operation. That circuit drawn below it uses the basic configuration of quadruple amplifier, but using a configuration in bridge, it can be obtained about 4 times the maximum potency. In that configuration of quadruple amplifier it can be used as amplifier end of systems surround, when 7 watts for channel are already a good potency, using the minimum of components.Operation of the circuit of the audio amplifier with tda7375 The capacitor C8 uncouples the internal tension divisor. The capacitors C5 and C6 are the filter for Power supply. The capacitors of 2200µF / 25V are the exit capacitors. Vs is the Power supply that can be a car battery or a supply of 14 volts. Power supply for the circuit It can be with a transformer 12V/30VA, a rectifier bridge and a capacitor electrolytic of 4700µF or (larger). The maximum consumption of current with loads of 4Ohms is 2.1 A. You can use loads of 2 ohms, but he/she also remembers to increase the size of the of heat-sink, because the circuit integrated in Multiwat package it will heat up a little more. Suggestion of printed circuit board side of the copperSuggested PCB for mounting the amplifier tda7375, component side Information about mounting circuit audio amplifier. When assembling the circuit remember that this quad amplifier channels features two four inverted, then it should connect the speakers in reverse polarity at such times, attention to the polarity of electrolytic capacitors that should be of good quality. Before welding the tda7375 remember to solder the jumper, which will be underneath the integrated. TDA7375 Audio Amplifier 2x35W

TDA7375 features:

HIGH OUTPUT POWER CAPABILITY:

– 2 x 40W max./4
– 2 x 35W/4 EIAJ
– 2 x 35W/4 EIAJ
– 2 x 25W/4 @14.4V, 1KHz, 10%
– 4 x 7W/4 @14.4V,1KHz, 10%
– 4 x 12W/2 @14.4V, 1KHz, 10%

MINIMUM EXTERNAL COMPONENTS

COUNT:
– NO BOOTSTRAP CAPACITORS
– NO BOUCHEROT CELLS
– INTERNALLY FIXED GAIN (26dB BTL)

ST-BY FUNCTION (CMOS COMPATIBLE)
NO AUDIBLE POP DURING ST-BY OPERATIONS

DIAGNOSTICS FACILITY FOR:

– CLIPPING
– OUT TO GND SHORT
– OUT TO VS SHORT
– SOFT SHORT AT TURN-ON
– THERMAL SHUTDOWN PROXIMITY

TDA7375 circuit diagram:

Double Bridge TDA7375

Quad SterioTDA7375

SterioBridge TDA7375

TDA7375 layout:

16 × 2 LCD Volt Meter Ampere Meter With PIC

Volt meters & ampere meter with PIC can be used to measure voltage and current simultaneously. The series of volt meters & ampere meter with PIC16F876A PIC is used as a data processor voltage and current are measured.

This circuit uses the viewer in the form of 16 × 2 LCD used for the data display voltage and current measurements. In the article volt meter and ampere meter with PIC are discussed kerannya limited to devices only. More detail can be seen from the image sequence volt meter and ampere meter with PIC below.

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Volt meters & ampere meter with PIC