Build a 60W Transistored Power Amplifier Circuit Diagram

This is the circuit diagram of 60W transistored power amplifier. This circuit was designed and built during the 80s. From then it works without problem. It does not present a particular construction problem, apart from the known: the attention to the supplied power source, choosing suitable heatsinks and good matching of the driver transistors. The diodes D3..5 should be placed on the heatsinks of power transistors to have thermal coupling with the output transistors.

 60W Transistored Power Amplifier Circuit Diagram

With the trimmer R15, we regulate the voltage at the output of the amplifier [with long work hours and little heat stabilized]. With the trimmer TR1, we can adjust the bias current of the amplifier at 50 to 100 mA. The bias current can be measured if you measure the voltage drop at the ends of the resistors R36 and R37, for the voltage that are given in the circuit, the current is approximately 75 mA. The voltage indicated in above diagram can be different, but may have a tolerance of about +/- 10%.

Parts List

R1 = 1.8K ohm	R25 = 8.2K ohm	D1,D2 = 24V/1W Zener	C1 = 4.7uF/25V
R2 = 220K ohm	R26 = 27K ohm	D3….9 = 1N4002	C2 = 470pF
R3 = 27K ohm	R27 = 820 ohm	T1-2 = BC550C	C3-4 = 100uF/63V
R4,R10,R11,R17 = 3.3K ohm	R28 = 3.3K ohm	T3,T4 = BC560C	C5 = 68pF
R5,R9,R12,R16 = 100 ohm	R29 = 100 ohm	T5,T13 = BD530	C6,C10 = 330pF
R6 = 18K ohm	R31,R39 = 180 ohm	T6,T8 = BC414C	C7 = 22pF
R7,R13 = 3.9K ohm	R32,R38 = 6.8K ohm	?9 = BC416C	C8 = 220uF/16V
R14 = 10K ohm	R33,R34 = 1.2K ohm	T7,T10 = BD529	C9 = 100nF 100V
R15 = 22K ohm Trimmer	R35 = 82 ohm /1W	T11 = BD591	C11,C12 = 10pF
R18,R23 = 330 ohm	R36,R37 = 0.33 ohm / 5W	T14 = BD592	C13,R15 = 47uF/63V
R19,R21,R22 = 15K ohm	R40,R41 = 10 ohm / 2W	T12 = 2N5630	C16,R17 = 100nF/100V
R20 = 12K ohm	R42 = 180 ohm/5W	T15 = 2N6030	C18,R19 = 100nF/100V
R24,R30 = 82 ohm	TR1 = 4.7K ohm Trimmer

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Build a Simple Quiz Master Wiring diagram Schematic

How to Build a  Simple Quiz Master Circuit Diagram, Quiz master is a device which uses electronics to decide who pushes their button first, Up to eight players each have their own answer button to press, corresponding to the four Red Team and four Green Team LEDs on the master control board. As soon as the first contestant who thinks that he knows the answer presses the button, a loud tone sounds, all other contestants are locked out, and the contestant`s indicator LED lights on the control board so that it`s obvious who buzzed in first. 

The control board also features two selectable time out periods each adjustable from 3 to 15 seconds, setting specified time intervals in which the player must answer before the time`s up! tone sounds. Eight SCRs form the heart of the schema. The anode of each SCR has a positive (+) bias on it by way of an LED and a negative (-) bias on cach cathode. As soon as a contestant depresses his or her switch button (S4 through Sll), a positive bias is applied to the respective SCR gate. 

Simple Quiz Master Circuit Diagram

That bias latches the contestant`s SCR on, which in turn lights up the appropriate LED on the master control board. At the same time, the activity of the SCR latching on turns on the answer buzzer (BZ) and locks out all other contestants. The lockout occurs because relay K2 contacts operate to remove the availability of a bias voltage to the gate of the other SCRs. The other schemary consists of a timer schema and a time`s-up tone-generating schema. 

The timer schema consists of transistor Ql, capacitor CI, resistors Rl through R3, and trimmer resistors PI and P2, Depending on the adjustment of the trimmer resistors and selection switch S3, a specific time period can be set. The lime`s-up tone-generating schema is made up of IC1, transistors Q2 and Q3, and the associated resistors and capacitors. The on time of the tone can be set by P3. Relay Kl, which is operated by the timer schema, serves to reset the entire unit for the next question.

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How to build An Expandable Multi Zone Modular Burglar Alarm

Description

The Basic Alarm Circuit has an automatic Exit/Entry Zone - an Instant Alarm Zone that will accept both normally-closed and normally-open triggering devices - and an "Always On" 24-hour Personal Attack/Tamper Zone. By using the Expansion Modules - you can add as many extra alarm zones as you require.

Schematic Diagram

The Alarm is armed and disarmed by SW1. Before you move the switch to the "set" position - all the green LEDs should be lighting. You then have up to about a minute to leave the building. As you do so - the Buzzer will sound. It should stop sounding when you close the door behind you. This indicates that the Exit/Entry loop has been successfully restored within the time allowed. 

When you re-enter the building - you have up to about a minute to move SW1 to the "off" position. If SW1 is not switched off in time - the relay will energize - and the main bell will ring. It will continue ringing for up to about 40 minutes. But it can be turned off at any time by SW1. 

The "Instant" zone has no Entry Delay. The moment one of its normally-open switches is closed - the main bell will ring. Similarly - the moment one of its normally-closed switches is opened - the main bell will ring. If you dont want to use normally-open switches - leave out R8, C8 and Q2 - and fit a link between Led 3 and C7.

The 24 Hour Personal Attack and Tamper protection is provided by the SCR/Thyristor. If one of the switches in the normally-closed loop is opened - current through R11 will trigger the SCR - and the main bell will ring. In this case the bell has no time limit. To reset the PA/Tamper zone - first restore the normally-closed loop - then press SW2 momentarily. This will interrupt the current and reset the SCR.

Two-Zone Expansion Module

The basic schema will be satisfactory in many situations. However, if you have a large building to protect - its much easier to find a fault - when the system is divided into zones - and the control panel can "remember" which zone has caused the activation. 

The expansion modules are designed to do this. Although they will work with the existing instant zone - they are intended to replace it. When a zone is triggered - its red LED will light and remain lit - to indicate that the zone has been activated. 

The idea is that - once youve noted the zone in question - you then press the reset button and turn off the LED. The reset button simply turns off the LED. It doesnt reset the zone. The zone resets automatically when the trigger schema is restored. If youre using more than one expansion module - they can all share a single reset button.

Inertia-Sensor Module

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Build a BTL Stereo Amplifier Wiring diagram Schematic with TDA7052

Build a BTL Stereo Amplifier Circuit Diagram with TDA7052 , you can see schema and start make a BTL Stereo Amplifier Circuit Diagram with TDA7052.

BTL Stereo Amplifier Circuit Diagram with TDA7052 

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Build a Remotely Adjustable Solid State High voltage Supply Wiring diagram Schematic

How to build a remotely adjustable solid state high-voltage supply Circuit Diagram. The output voltage changes approximately linearly up to 20 KV as the input voltage is varied from 0 to 5 V. The oscillator is tuned by a 5-0 potentiometer to peak the output voltage at the frequency of maximum transformer response between 45 and 55 kHz. 

The feedback voltage is applied through a 100-KO resistor, an op amp, and a comparator to a high-voltage amplifier. A diode and varistors on the primary side of the transformer protect the output transistor. The transformer is a flyback-type used in color-television sets. A feedback loop balances between the high-voltage output and the low-voltage input.

Remotely Adjustable Solid State High-voltage Supply Circuit Diagram

Remotely Adjustable Solid State High-voltage Supply Circuit Diagram

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Build a Low Noise And Drift Composite Amp Wiring diagram Schematic

How to Build a Low Noise And Drift Composite Amp Circuit Diagram. This schema offers the best of both worlds. It can be combined with a low input offset voltage and drift without degrading the overall system`s dynamic performance. 

 Low Noise And Drift Composite Amp Circuit Diagram

Compared to a standalone FET input operational amplifier, the composite amplifier schema exhibits a 20-fold improvement in voltage offset and drift. In this schema arrangement, A1 is a highspeed FET input op amp with a closed-loop gain of 100 (the source impedance was arbitrarily chosen to be 100 kfl). A2 is a Super Beta bipolar input op amp. It has good dc characteristics, biFET-level input bias current, and low noise. A2 monitors the voltage at the input of A1 and injects current to Al`s null pins. This forces A1 to have the input properties of a bipolar amplifier while maintaining its bandwidth and low-input-bias-current noise.

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Build a 1000W Power Amplifier Wiring diagram Schematic

This is a like full 1000W Power Amplifier Circuit Diagram. I think youve seen or even have an active speaker and there is written 1500 watts PMPO (Peak Music Power Output), make no mistake this is different from Power Amplifier Active Speaker, I often dismantle such Active Speaker in it only a power with power no more than 150 watts by using the transformer 2-3 Ampere. PMPO is not a real power which is issued by the Power Amplifier, but counting all the speakers that there is, for example: if there are 5 pieces of speakers on each channel and each speaker has a power of 10 W then it is 100 W PMPO.

1000W Power Amplifier Circuit Diagram

 While this 1000 Watt Power Amplifier minimal use transformer 20 Ampere. And the output of Power Amplifier DC voltage contains approximately 63 volts, with currents and voltages of this magnitude, this 1000 Watt Power Amplifier will not hesitate hesitate to destroy your woofer speakers to connect. To overcome that then before the speaker on connects to 1000 Watt Power Amplifier must be in pairs Speaker Protector.

Actually if you want to create a Power Amplifier with great power does not have to make a Power Amplifier with great power. Example: you want to create a Power Amplifier with 10 000 Watt power. You do not have to assemble a Power Amplifier with power of 10,000 watts, but you assemble the power Power Amplifier Small but many, such as you assemble the Power Amplifier with 1000 Watts of power for as many as 10 pieces, it will produce 10 000 Watt Power Amplifier helpless.

Parts List

Circuit uses power transistors pair of 5 x 5 x 2SA1216 and 2SC2922 and 2SC1583 use a differential amplifier that actually contains 2 pieces of transistors that are in containers together. Why use such built-in amplifier differental tujuanya so identical / similar, could have uses 2 separate transistors but can result in amplifier so it is not symmetrical.

Tips combining speaker

To get the speakers with great power combining techniques can be used in parallel series, combining each group of speakers should sepaker they will have the same impedance, the same type (Woofer, Mid Range or tweeter) and the same power. Number of merging these speakers should consists of 4 , 9, 16 ff, see picture

Example
The number of speakers have 4 pieces each of its 200 Watt power generated will be a speaker at = 200 x 4 = 800 Watt. If there are 9 speakers 200 W then the result = 9 x 200 W = 1800 Watt.

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Build a Charger Extends Lead Acid Battery Life Wiring diagram Schematic

The Charger Extends Lead-Acid Battery Life Circuit Diagram furnishes an initial charging voltage of 2.5 V per cell at 25°C to rapidly charge a battery. The charging current decreases as the battery charges, and when the current drops to 180 mA, the charging schema reduces the output voltage to 2.35 V per cell, floating the battery in a fully charged state. 

This lower voltage prevents the battery from overcharging, which would shorten its life. The LM301A compares the voltage drop across R1 with an 18-mV reference set by R2. The comparator`s output controls the voltage regulator, forcing it to produce the lower float voltage when the battery-chaiging current passing through R1 drops below 180 mA. the 150-mV difference between the charge and float voltages is set by the ratio of R3 to R4. The LEDs show the state of the schema . 

Charger Extends Lead-Acid Battery Life Circuit Diagram

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Build a Voltage Regulator 12v to 24v using 7812

How to build a voltage regulator 12v to 24v using 7812. What many people do not know is it possible for a voltage regulator IC to provide an output voltage higher than its actual value. One method to achieve this is by connecting the "common" terminal to the middle point of a potential divider, but the problem with this method is that the regulators IC has a small quiescent current (~ 10 mA) flowing out the common terminal to ground.

The schema presented here avoids the problems of using the IC regulator to raise the voltage via the transistor Q1 to generate a low impedance to the common terminal video controller during the transfer of the voltage divider from a resistor divider network relatively high. The value of R3 is not critical, but should be low enough to accept the higher quiescent current without causing problems for T1.

Voltage Regulator 12v to 24v Circuit Diagram 

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How to Build Unregulated Linear Power Supply

Unregulated power supplies contain four basic components: transformer, rectifier, filter capacitor, and a bleeder resistor. This type of power supply, because of Us simpticity, is the least costly and most reliable for low power requirements. The disadvantage is that the output voltage is not constant It will vary with the input voltage and the load current, and the ripple is not suitable for electronic applications. The ripple can be reduced by changing the filter capacitor to an LC (inductor-capacitor) filter but the cost to make this change would make use of the regulated linear power supply a more economical choice.

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Build a Bootstrapped Amp Current Source Wiring diagram Schematic

Build a Bootstrapped Amp Current Source Circuit Diagram. This schema responds to the difference between Vj and V2. Rq on sets gain. Resistors XR2 and (1 -X) R2 produce the bootstrap effect. These two resistors convert the schema`s output voltage to a current. IC1 and IC2 are Burr-Brown OPA2107 or equal.

Bootstrapped Amp Current Source Circuit Diagram

Build a Bootstrapped Amp Current Source Circuit Diagram

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LM380 Build 2 Watts Audio Amplifier Wiring diagram Schematic

LM380, Build 2 Watts Audio Amplifier Circuit Diagram. Small audio amplifier is useful for audio troubleshooting or simple audio projects. It should be a low cost and easy to build. Using integrated schema for this purpose is the right choice. With LM380  audio amplifier integrated schema, 2 Watts power can be delivered. For better thermal endurance, a large copper track can be printed in the board to provide heat sinking, this copper track should be soldered to pins 4, 3, 10, 5, 12 and 11. Here is the schematic diagram of the schema.

LM380, Build 2 Watts Audio Amplifier Circuit Diagram

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Build a Low Noise Active Antenna Wiring diagram Schematic

Build a Low-Noise Active Antenna Circuit Diagram. This is a Vlf/Vhf Wideband Low-Noise Active Antenna Circuit Diagram. A 30- to 50-cm whip antenna provides reception from 10 kHz to over 220 MHz. Tl, a dual-gate MOSFET, provides low noise, high-input impedance, and high gain, The schema is powered via the coaxial cable used to connect the antenna to a receiver.

 Low-Noise Active Antenna Circuit Diagram

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Build a Bridge Wiring diagram Schematic With One Power Supply

This is simple Bridge Circuit Diagram With One Power Supply. For systems with only one power supply, two op amps act as instrumentation and buffer amps. The OPA111 AM buffers the reference mode of the bridge and applies that voltage to the instrumentation amps ref terminal. Output is taken between the amplifier outputs to exclude the fixed output offset. 

The additional op amp creates a bridge error of 2, where IB=bias current of op amp and R is the resistance of one leg of the bridge.

Bridge Circuit Diagram With One Power Supply

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Build a Voice Scrambler or Descrambler Wiring diagram Schematic

This Voice Scrambler or De-scrambler Circuit Diagram uses an NE602 as an inversion mixer. U2 is set to run at about 2.5 to 3.5 kHz. U3 drives a loudspeaker. Because speech inversion scrambling is its own inverse, the schema will also descramble . 

Voice Scrambler or Descrambler Circuit Diagram

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Build a Toy Siren Wiring diagram Schematic

This simple Toy Siren schema for hobbyist and student who game liker, this is a very simple Toy Siren schema,  This Toy Siren schema can be built small enough to frt inside a toy. The Toy Siren schema consists of a relaxation oscillator utilizing one uni-junction transistor (2N2646, MU10, TIS43). R2 and C2 determine the frequency of the tone. 

 Simple Toy Siren Circuit Diagram

Pushing the button, SW1 charges up the capacitor and the potential at the junction of R2 and C2 rises, causing an upswing in the frequency of oscillation. On releasing the push-button the charge on C2 will drop slowly with a proportional reduction in the frequency of oscillation. Manual operation of the button at intervals of approximately 2 seconds will produce a siren sound.

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