uA 741 Pre-amplifier Guitar Schematic

uA 741 Pre-amplifier Guitar Schematic

A preamplifier ambit acceptable for aerial impedance blazon electric guitar pickups is accustomed here.The ambit is based on a uA 741 op-amp (IC1).The IC1 is active as a non-inverting amplifier.The POT R1 can be acclimated as a aggregate controller.The POT R6 can be acclimated as accent controller.The about-face S1 is acclimated to aftermath “brilliant” or “soft” tonal effects.

Notes.

* Assemble the ambit on a acceptable affection PCB or accepted board.

* The amplifier can be powered from a 12V array or 12V DC ability supply.

* Up to 24 V DC can be acclimated to ability the circuit.i acclaim 12 V DC.

* The IC 1 should be army on an IC abject .

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Ibanez Wiring Diagram

 Ibanez Wiring Diagram

The following schematic shows 2008 ART Ibanez Wiring Diagram which consists of neck pickup, bridge pickup, neck volume 50K-B, bridge volume 50K-B, 3way-toggle, tone, output, and battery box.

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uA 741 Pre-amplifier Guitar Schematic

uA 741 Pre-amplifier Guitar Schematic

A preamplifier ambit acceptable for aerial impedance blazon electric guitar pickups is accustomed here.The ambit is based on a uA 741 op-amp (IC1).The IC1 is active as a non-inverting amplifier.The POT R1 can be acclimated as a aggregate controller.The POT R6 can be acclimated as accent controller.The about-face S1 is acclimated to aftermath “brilliant” or “soft” tonal effects.

Notes.

* Assemble the ambit on a acceptable affection PCB or accepted board.

* The amplifier can be powered from a 12V array or 12V DC ability supply.

* Up to 24 V DC can be acclimated to ability the circuit.i acclaim 12 V DC.

* The IC 1 should be army on an IC abject .

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LM331 Frequency Voltage Converter Circuit

LM331 Frequency Voltage Converter Circuit

LM331 is basically a attention voltage to abundance advocate from National Semiconductors. The IC has a duke abounding of applications like analog to agenda conversion, continued appellation integration, voltage to abundance conversion, abundance to voltage conversion. Wide activating ambit and accomplished breadth makes the IC able-bodied acceptable for the applications mentioned above.

Here the LM331 is active as a abundance to voltage advocate which converts the ascribe abundance into a proportional voltage which is acutely beeline to the ascribe frequency. The abundance to voltage about-face is accomplished by appropriate the ascribe abundance application capacitor C3 and resistor R7 and agriculture the resultant beating alternation to the pin6 (threshold) of the IC. The abrogating activity bend of the resultant beating alternation at pin6 makes the congenital comparator ambit to activate the timer circuit. At any instant, the accepted abounding out of the accepted achievement pin (pin 6) will be proportional to the ascribe abundance and amount of the timing apparatus (R1 and C1). As a aftereffect a voltage (Vout) proportional to the ascribe abundance (Fin) will be accessible beyond the amount resistor R4.

Notes.

* The ambit can be accumulated on a vero board.

* I acclimated 15V DC as the accumulation voltage (+Vs) while testing the circuit.

* The LM331 can be operated from annihilation amid 5 to 30V DC.

* The amount of R3 depends on the accumulation voltage and the blueprint is R3= (Vs – 2V)/ (2mA).

* According to the equation, for Vs = 15V, R3=68K.

* The achievement voltage depends on the equation, Vout = ((R4)/(R5+R6))*R1C1*2.09V*Fin.

* POT R6 can be acclimated for calibrating the circuit.

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Rangkaian Pengontrol Kecepatan Untuk Bor PCB

Rangkaian Pengontrol Kecepatan Untuk Bor PCB

Here is a simple ambit for authoritative the acceleration of DC operated PCB drills. The affection of this ambit is the ICLM3578 which is a actual able chip switching regulator that can be acclimated for applications like this. The LM3578 has abstracted inverting and non inverting acknowledgment inputs (pin1 and pin2), 1V centralized advertence voltage antecedent and a congenital in oscillator circuit. The IC can be configured to access up to 90% assignment cycle. In the circuit, capacitor C2 is the timing capacitor which determines the abundance of the centralized oscillator. The assignment aeon depends on the sum of resistors R1 and R2 and it can be assorted by adjusting the POT R2. The achievement PWM arresting will be accessible at pin 5 of the IC. The Q1 drives the motor M according to the PWM arresting accessible at pin5 and appropriately by capricious the assignment aeon of the PWM beachcomber by capricious POT R2, the acceleration of the motor can be adjusted. The diode D1 is a freewheeling diode which protects the MOSFET Q1 from transients produced by the motor. Capacitor C3 is aloof a clarify capacitor.

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Skema Rangkaian Generator Tegangan Tinggi

Rangkaian Generator Tegangan Tinggi

First of all let me admonish you that this ambit is a actual alarming one. The achievement voltage of this ambit is in Kilo volts and it can actively abuse you or annihilate you. Try this ambit alone if you accept abundant acquaintance ambidextrous with aerial voltages. I accept no albatross on any hazards acquired by the circuit. Be actual careful. This is a apprehensive request.

The ambit accustomed actuality has three sections namely oscillator, switching date and a footfall up stage. The oscillator is body about a NE555 timer operating at 25 KHz. The achievement of the NE555 accompanying to the abject of the ability transistor TIP3055 which is the switching device. The ability transistor drives primary of the footfall up agent at 25 KHz and as a aftereffect a aerial voltage will be induced beyond its secondary.

Notes.

* A 12V advance acerbic array can be acclimated for powering the circuit.

* TIP3055 charge be army on a calefaction sink.

* T1 can be an EHT (extra aerial tension) agent acclimated in television sets.

* For an EHT from 20inch TV, the achievement voltage will be 8 to 10 KV @12V accumulation voltage.

* This ambit is not an able one and is not acceptable for any austere applications.

* Once again, be actual accurate with this circuit!.

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Class B 45 Watt Amplifier Circuit Diagram

Class B 45 Watt Amplifier Circuit Diagram

Class B 45 Watt Amplifier Circuit Parts:

R1______________18K 1/4W Resistor
R2_______________3K9 1/4W Resistor
R3,R6____________1K 1/4W Resistors
R4_______________2K2 1/4W Resistor
R5______________15K 1/4W Resistor
R7______________22K 1/4W Resistor
R8_____________330R 1/4W Resistor
R9,R10__________10R 1/4W Resistors
R11,R12_________47R 1/4W Resistors
R13_____________10R 1W Resistor


C1_______________1µF 63V Polyester Capacitor
C2_____________470pF 63V Polystyrene or Ceramic Capacitor
C3______________47µF 25V Electrolytic Capacitor
C4______________15pF 63V Polystyrene or Ceramic Capacitor
C6_____________220nF 100V Polyester Capacitor
C6_____________100nF 63V Polyester Capacitor

D1,D2,D3,D4___1N4148 75V 150mA Diodes

Q1,Q2________BC560C 45V 100mA Low noise High gain PNP Transistors
Q3,Q4________BC556 65V 100mA PNP Transistors
Q5___________BC546 65V 100mA NPN Transistor
Q6___________BD139 80V 1.5A NPN Transistor
Q7___________BD140 80V 1.5A PNP Transistor
Q8__________2N3055 60V 15A NPN Transistor
Q9__________MJ2955 60V 15A PNP Transistor

The main design targets for this amplifier were as follows:

• Output power in the 40 - 70W range
• Simple circuitry
• Easy to locate, low cost components
• Rugged performance
• No setup

These goals were achieved by using a discrete-components op-amp driving a BJT complementary common-emitter output stage into Class B operation. In this way, for small output currents, the output transistors are turned off, and the op-amp provides all of the output current. At higher output currents, the power transistors conduct, and the contribution of the op-amp is limited to approximately 0.7/R11. The quiescent current of the op-amp biases the external transistors, and hence greatly reduces the range of crossover.

The idea sprang up from a letter published on Wireless World, December 1982, page 65 written by N. M. Allinson, then at the University of Keele, Staffordshire.
In this letter, op-amp ICs were intended as drivers but, as supply voltages up to +/- 35V are required for an amplifier of about 50W, the use of an op-amp made of discrete-components was then considered and the choice proved rewarding.

The discrete-components op-amp is based on a Douglas Self design. Nevertheless, his circuit featured quite obviously a Class A output stage. As for proper operation of this amplifier a Class B output stage op-amp is required, the original circuit was modified accordingly.

Using a mains transformer with a secondary winding rated at the common value of 25 + 25V (or 24 + 24V) and 100/120VA power, two amplifiers can be driven at 45W and 69W output power into 8 and 4 Ohms respectively, with very low distortion (less than 0.01% @ 1kHz and 20W into 8 Ohms).

This simple, straightforward but rugged circuit, though intended for any high quality audio application and, above all, to complete the recently started series of articles forming theModular Preamplifier Control Center, is also well suited to make a very good Guitar or Bass amplifier.

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