Monday, May 31, 2010

Quad Audio Amplifier Circuit diagram with TDA7831 4×25W

Quad Audio Amplifier Circuit diagram with TDA7831 4×25WQuad Audio Amplifier Circuit diagram with TDA7831 4×25W



The afterward is a cloister amplifier circuit (amplifier with four inputs and four outputs) based TDA7381. This amplifier is advised for car audio system, but you can additionally use this ambit for added purposes. This ambit has a architecture actual simple and actual accessible to build.
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Friday, May 28, 2010

Guitar Control Circuit Diagram

Guitar Control Circuit DiagramGuitar Control Circuit Diagram

Device purpose:

This preamplifier was advised as a stand-alone carriageable unit, advantageous to ascendancy the signals generated by guitar pick-ups, decidedly the acquaintance "bug" types activated to acoustic instruments. Obviously it can be acclimated with any blazon of apparatus and pick-up.

It appearance a -10dB, 0dB and +10dB pre-set ascribe selector to acclimatize ascribe sensitivity, in adjustment to cope with about any analeptic blazon and model. a actual continued array activity is ensured by the abundantly low accepted burning of this circuit, i.e. beneath than 800µA.

Circuit operation:

IC1A op-amp is alive as an inverting amplifier, accepting its accretion set by a three means about-face inserting altered amount resistors in alongside to R4. This ascribe date is followed by an alive three-band accent ascendancy date accepting accord accretion back controls are set in their centermost position and congenital about IC1B.

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Tuesday, May 25, 2010

Audio VU Level Meter Circuit with LM324

Audio VU Level Meter Circuit with LM324Audio VU Level Meter Circuit with LM324

The 1K resistors in the circuit are capital so that the LED's about-face on at altered audio levels. There is no acumen why you can't change these resistors, although annihilation aloft 5K may account some of the LED's to never about-face on. This ambit is calmly abundant with added op-amps, and is not bound to use with the LM324. Pretty abundant any op-amp will assignment as continued as you attending up the pinouts and accomplish abiding aggregate is appropriately connected.

The 33K resistor on the schematic is to accumulate the arresting ascribe to the ambit at a low level. It is absurd you will acquisition a 33K resistor, so the abutting you can get should do. The amount of this resistor may charge to be changed, so it is best you breadboard this ambit afore absolutely amalgam it on PCB. The ambit in it's accepted anatomy will acquire band akin inputs from sources such as the aux out on a Hi-Fi, all admitting could be calmly adapted to acquire apostle inputs.

The audio + is affiliated to the capital absolute rail, while the audio - is acclimated for arresting input. The 50k pot can be acclimated to alter the acuteness of the circuit.

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Monday, May 24, 2010

Car Battery Charger 12Volt Circuit Diagram

Car Battery Charger 12Volt Circuit DiagramCar Battery Charger 12Volt Circuit Diagram

The aloft circuit claimed accept adeptness to anticipate array blackmail that accomplish electrolyte absent due to evaporation. This ambit will annihilate the problems by ecology the battery’s action of allegation through its attendant ascendancy ambit by applying a aerial allegation accepted until the array is absolutely charged. Back charging is complete, it turns on the red LED (LD2) and deactivates the charging circuit.

This ambit is fatigued to allegation 12V batteries ONLY. Certain accent should be taken back base up this circuit. They are the access of the agent to the ambit board, and those bartering accepted to the array actuality charged. These access should be fabricated with cables accepting a ample cross-sectional breadth to anticipate voltage-drop and calefaction accession back accepted flows through them.

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Saturday, May 22, 2010

MP3 Car Amplifier Schematic Circuits 150W

MP3 Car Amplifier Schematic Circuits 150W MP3 Car Amplifier Schematic Circuits 150W



These accessories are low cost, aerial speed, bifold JFET ascribe operational amplifiers with an internally akin ascribe account voltage (BI-FET II technology). They crave low accumulation accepted yet advance a ample accretion bandage amplitude artefact and fast bulk rate. In addition, able-bodied akin aerial voltage JFET ascribe accessories accommodate actual low ascribe bent and account currents. The LF353 is pin accordant with the accepted LM1558 acceptance designers to anon advancement e the all-embracing achievement of absolute LM1558 and LM358 designs. These amplifiers may be acclimated in applications such as aerial acceleration integrators, fast D/A converters, sample and authority circuits and abounding added circuits acute low ascribe account voltage, low ascribe bent current, aerial ascribe impedance, aerial bulk amount and advanced bandwidth. The accessories additionally display low babble and account voltage drift. (National Semiconductor



Internally trimmed offset voltage: 10 mV

Low input bias current: 50pA

Low input noise voltage: 25 nV

Low input noise current: 0.01 pA

Wide gain bandwidth: 4 MHz

High slew rate: 13 V/us

Low supply current: 3.6 m

High input impedance: 1012.

Low total harmonic distortion : <>
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Friday, May 21, 2010

65W Power Amplifier Circuits with HEXFET

65W Power Amplifier Circuits with HEXFET 65W Power Amplifier Circuits with HEXFET



A average ability amplifier that is characterized by a lot of acceptable complete quality, but accompanying is actual simple in the construction. Him uses, abundant time in my alive loudspeakers. In his achievement date abide the actual acceptable FET transistors, technology HEXFET, transistor which are controlled by voltage and no by accepted as the classically bipolar transistors. The ambit has balanced designing, absolute appropriately the harmonic baloney problem.



All the transistors that are acclimated in the ambit are simple and they abide in big clearings in the market. The pairs of cogwheel amplifiers Q1-2 and Q3-4 should be akin amid them and abreast the one in the other. Appropriately you can buy abundant transistors of types BC550C and BC560C, and with a multimeter you bout amid them creating pairs with aforementioned characteristics, ensuring appropriately compatible behavior in the temperature changes etc. Networks RC from the R7/C3 and R12/C4 abatement the bandwidth of cogwheel amplifiers and ability amplifier in the 6.5MHZ. Resistors R8-9-10-11 action as bounded acknowledgment in the cogwheel amplifiers convalescent the linearity. The cogwheel amplifiers are supplied with connected accepted from him accepted sources Q5 and Q6. The bent of accepted sources becomes from the aggregate of diodes LED D1, D2 and R20.



This becomes because the aggregate transistor/LED ensures big thermic stability, for this acumen should they are in actual abreast ambit [1]. With the TR1 trimmer we adapt the bent accepted of achievement ability stage. For this acumen Q8 should acquisition itself on the heatsink so that it ensures thermic adherence in the bias, so that it does not change with the temperature changes. The resistors R32-33 appearance a bounded acknowledgment bronchus in the achievement stage, because this functions as voltage amplifier.



With the TR1, R3-4, C14 we adapt the amplifier achievement DC account voltage, abreast in the zero. The transistors Q8-10-11-12-13, [Fig.1] should are placed on heatsink, abacus amid the transistors and the heatsink of acceptable affection leaves mica and ointment. Inductor L1 is constituted by 6 coils of cloistral cupreous wire of bore 1.5mm, with centralized inductor bore of 16mm
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Wednesday, May 19, 2010

Audio Power Amplifier 170W with LM4651 & LM4652

Audio Power Amplifier 170W with LM4651 & LM4652Audio Power Amplifier 170W with LM4651 & LM4652

The aggregate of the LM4651 disciplinarian IC and the LM4652 ability MOSFET Class D ability amplifier IC provides a aerial ability amplifier solution, acceptable for self-powered speakers, subwoofers and affection car boosters.

The LM 4651 is a absolutely chip accepted beating amplitude modulator (PWM) driver, absolute undervoltage, abbreviate circuit, overmodulation, and thermal abeyance aegis circuitry. The IC appearance a standby action which shuts bottomward the beating amplitude modulation, aspersing accumulation current.

The LM 4652 is a absolutely chip H-bridge Ability Mosfet IC in a TO220 ability package. The IC has a congenital in temperature sensor to active the LM4651 back the die temperature exceeds the beginning limit.

Used together, the LM4651 and LM4652 anatomy a simple, compact, efficient, aerial affection ability audio amplifier band-aid complete with protection, commonly apparent alone in Class AB amplifiers.

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Tuesday, May 18, 2010

Odd Block KT88 Series 1 Tube Amp-Power Supply

Odd Block KT88 Series 1 Tube Amp-Power Supply  Odd Block KT88 Series 1 Tube Amp-Power Supply

A schematic of the ability accumulation is apparent below. Like the amplifier schematic, the ability accumulation ambit is © OddWatt Audio and permission to host the schematic on this armpit has been provided by OddWatt Audio. You are chargeless to use the schematic for personal, non-commercial use.

Mains ability enters the amplifier through an IEC atrium amid at the rear of the amp. The IEC atrium includes a 3 Ampere agglutinate and an EMI filter. The ability agent is an OEM bogus by Edcor with ratings of 180V-0-180V at 250 mA and 12V at 4A. Ability accumulation capacitors are Panasonic ECG alternation 500 volt electrolytic and Solen Polypropyene. The ample ability resistors are Vishay/Dale wire anguish and the actual resistors are carbon film. The High-Tension (HT) accumulation is rectified with STTH5 ultrafast aerial voltage rectifiers and uses CRC filtering. A 12V DC accumulation is acclimated for the tube heaters. An adjustable adjournment ambit is acclimated to adjournment the HT accumulation on ability up.

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Sunday, May 16, 2010

6 Watt Audio Amplifier Schematic Circuit with TDA1519

6 Watt Audio Amplifier Schematic Circuit with TDA15196 Watt Audio Amplifier Schematic Circuit with TDA1519

The audio amplifier circuit is on the TDA1519 amplifier IC that is based in audio applications, which is not a aerial achievement ability can be used. The ambit TDA1519 is a ability of 2×6 watts.

The TDA1519 is an amplifier congenital Class B dual-output advance in a 9-by-line (SIL) artificial amalgamation boilerplate achievement is primarily developed for car radio applications.

Key Features of the audio amplifier IC TDA1519 are: Requires few alien components, anchored gain, acceptable bounce drive, aphasiac / standby mode, thermal protection, about-face polarity safe. Tda1519 amplifier ability rating, 14.4 volts.

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Thursday, May 13, 2010

1.5V Amplified Ear Circuit Diagram

1.5V Amplified Ear Circuit Diagram1.5V Amplified Ear Circuit Diagram

Device purpose:

This circuit, affiliated to 32 Ohm impedance mini-earphones, can ascertain actual alien sounds. Useful for theatre, cinema and address goers: every chat will be acutely heard. You can additionally accept to your television set at a actual low volume, alienated to bother ancestors and neighbors. Even if you accept a faultless hearing, you may ascertain abrupt sounds application this device: a alien bird twittering will assume actual abutting to you.

Circuit operation:

The affection of the ambit is a constant-volume ascendancy amplifier. All the signals picked-up by the microphone are amplified at a connected akin of about 1 Volt aiguille to peak. In this address actual low amplitude audio signals are awful amplified and aerial amplitude ones are limited. This operation is able by Q3, modifying the bent of Q1 (hence its AC gain) by agency of R2. A noteworthy affection of this ambit is 1.5V array operation. Typical accepted drawing: 7.5mA.

Notes:

  • Due to the constant-volume control, some users may consider P1 volume control unnecessary. In most cases it can be omitted, connecting C6 to C3. In this case use a SPST slider or toggle switch as SW1.
  • Please note the stereo output Jack socket (J1) connections: only the two inner connections are used, leaving open the external one. In this way the two earpieces are wired in series, allowing mono operation and optimum load impedance to Q4 (64 Ohm).
  • Using suitable miniature components, this circuit can be enclosed in a very small box, provided by a clip and hanged on one's clothes or slipped into a pocket.
  • Gary Pechon from Canada reported that the Amplified Ear is so sensitive that he can hear a whisper 7 meters across the room.

    He hooked a small relay coil to the input and was able to locate power lines in his wall. He was also able to hear the neighbor's stereo perfectly: he could pick up the signals sent to the speaker voice coil through a plaster wall.

    Gary suggests that this circuit could make also a good electronic stethoscope.
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Wednesday, May 12, 2010

L297 Stepper Motor Controller Circuits

L297 Stepper Motor Controller CircuitsL297 Stepper Motor Controller Circuits



Four appearance drive signals for two appearance bipolar and four appearance unipolar footfall motors in microcomputer-controlled appliance is calmly implemented application L29 Stepper Motor Controller IC. We can drive the motor in bisected step, accustomed and beachcomber drives approach and switch-mode ascendancy of the accepted in the windings is permuted on dent PWM chopper circuits.



This accessory has some appearance like it requires alone clock, administration and approach ascribe signals. Since the appearance are produced internally the accountability on the microprocessor, and the programmer, is decidedly reduced. This accessory is army in DIP20 and SO20 packages. We can use L297 with caked arch drives such as L293E or L298N, or we additionally can use it with detached transistors and Darlingtons.
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Tuesday, May 11, 2010

Electronic Locker Circuit Schematic Picture

Electronic Locker Circuit Schematic
All the adapted numbers of the cipher are in the aforementioned line. To set the adjustment of the cardinal of the code, we accept to set the acceptable affiliation amid the bulge of the 7414 ascribe and the adapted bulge of the capacitor. For example, if we baddest the aboriginal band (y1) and the cipher is 0,1,2,3 the aboriginal cardinal (#1) is affiliated to the top larboard acquaintance (x1). The about-face 0 is agnate to x1/y1. These credibility of acquaintance are black in orange in the schematic. When the locker is locked, the red LED is angry on and the blooming LED is angry off. When the locker is opened, the red LED is angry off and the blooming LED is angry on. To lock the locker, we can advance any of the 16 switches of the matrix. The locker is powered by a 6V source. I acclaim application a 6V rechargeable array because this one lasts a continued time (at atomic 3 abounding days) and can be re-used. Otherwise, we can use four 1.5V array affiliated in serial. These atomic alone 5 hours but are beneath expensive.
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Friday, May 7, 2010

Simple Sound-to-Light Converter Schematic Diagram

Simple Sound-to-Light Converter Schematic DiagramSimple Sound-to-Light Converter Schematic Diagram

Figure 1 shows a simple ambit for converting an audio arresting (such as one that comes from the apostle terminals of a CD player). The ambit basically consists of a buffer/amplifier date and three clarify circuits: a high-pass filter, a mid-pass filter, and a low-pass filter. The achievement of anniversary clarify ambit drives a light-emitting diode of altered color.

The ascribe arresting is fed to the absorber date through C1. The ethics of RF and RV1 should be called so that the absorber is able to drive the three filters absorbed to its output. The low-frequency, mid-frequency, and high-frequency apparatus of the ascribe arresting are alone accustomed to canyon through the low-pass clarify (bottom filter), the mid-pass clarify (middle filter), and the high-pass clarify (topmost filter), respectively, appropriately amid them from anniversary other.

Changes in the achievement of a clarify account its agnate achievement LED to about-face on and off. In effect, agriculture a connected audio arresting to the ascribe of this ambit causes the LED's to 'dance'.

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Wednesday, May 5, 2010

POWER SUPPLAY 13,8 Volt Schematic

POWER SUPPLAY 13,8 Volt Schematic
POWER SUPPLAY 13,8 Volt Schematic
POWER SUPPLAY 13,8 Volt Schematic
POWER SUPPLAY 13,8 Volt Schematic

Part list for 12 Amp BDX33-based power supply:

  • 2 x 15 volt 6+ amps

  • 2 times two MR750 (MR7510) diodes (MR750 = 6 Ampere diode) or 2 times 3 1N5401 (1N5408) diodes.

  • F1 = 1 Amp

  • F2 = 15 amp

  • R1 2k2 1 Watt

  • R2 10k

  • R3 1k 0.5 watt

  • R4,R5,R6,R7 0.1 ohm 10 watt

  • R8 4.7

  • R9 6k8

  • C1 two times 4700uF/35v

  • C2 330uF/35v

  • C0',C3,C4,C6,C10 100nF

  • C7 330uF/25v

  • C8 47nF

  • C9 47uF/25v

  • D1 1N5401

  • D2 LED

  • D3, D4, D5 1N4001

  • IC1 78L15

  • relay 12 volt 2x5 amp switching

  • 3 darlington transistors: T0,T1,T2 = BDX-33 NPN TO-220 transistor

  • Zd 8 or 9 volt, 5 watt

  • P1 2k trimmer

If using a bridge rectifier (like in schematic 2) you do not need 2 x 15 volts 6 amps, but 1 x 15 volt 10+ Amps

Part list for 20 Amp BDX33-based power supply:

  • 2 x 15 volt 12+ amps

  • 2 times 3 MR750 (MR7510) diodes (MR750 = 6 Ampere diode) or 2 times 5 1N5401 (1N5408) diodes.

  • F1 = 2 Amp

  • F2 = 25 amp

  • R1 2k2 1 Watt

  • R2 10k

  • R3 1k 0.5 watt

  • R4,R5,R6,R7 0.1 ohm 10 watt

  • R8 4.7

  • R9 6k8

  • C1 22000uF/35v

  • C2 330uF/35v

  • C0',C3,C4,C6,C10 100nF

  • C7 330uF/25v

  • C8 47nF

  • C9 47uF/25v

  • D1 1N5401

  • D2 LED

  • D3, D4, D5 1N4001

  • IC1 7815

  • relay 12 volt 10 amp switching

  • Four darlington transistors: T0,T1,T2,T3 = BDX-33 NPN TO-220 transistor

  • Zd 8 or 9 volt, 5 watt

  • P1 2k trimmer

If using a bridge rectifier (like in schematic 2) you do not need 2 x 15 volts 12 amps, but 1 x 15 volt 20 Amps

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Sunday, May 2, 2010

50W AF Power Amplifier with STK4036II Schematic Circuit

50W AF Power Amplifier with STK4036II Schematic Circuit50W AF Power Amplifier with STK4036II Schematic Circuit



STK4036II features:

• Compact package for thin-type audio sets

• Member of pin-compatible series with outputs of 20 to 200W

• Easy heatsink design to disperse heat generated in thintype stereo sets

• Constant-current circuit to reduce supply switch-on and switch-off shock noise

• External supply switch-on and switch-off shock noise muting, load short-circuit protection, thermal shutdown and other circuits can be tailor-designed.
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