Monday, February 28, 2011

Tranceiver DC adapter

This DC adaptor provides a regulated 9V source for operating a transceiver in the car .The IC LM317 is mpounting tab is electrically connected to its output pin. so take this into account tour version of the adapter. The LM317T regulator dissipates 2 or 3 Watt in this circuit , so mount it on a 1- x -2 inch piece of 1/8 inch thick alumunium heatsink. Dont forget to give heatsink on the IC LM317.

High temperature protector with IC 3584

IC 3584 has thermal protection or voltage automatically shutdown when the temperature at IC exceed 150 degrees or more. You can operate this circuit at the transistor or IC heatsing, if a transistor or IC had exceeded the limit of the heat circuit automatically shutdown.

How to use a thermal shutdown circuit above that is first given a circuit of voltage V+,V-,and ground , the given a voltage Vin to be created automatically shutdown if the temperature is high , and the output is inserted in the circuit of an amplifier or other. Then IC embedded in the heatsing or case, which if too hot will shutdown alone. If the circuit already decided voltage, the voltage will re-connect if the temperature returns to normal.

Controlling switch with relay driver

The circuit above is  a circuit of drivers to control high voltage using the relay. Relay is controlled by an NPN transistor , its that works on 5V voltage and has diode in it, if the relay does not have s diode should be given with diode 1N4007 . Pin relay to  move the switch connected to V+ 5V and other is connected from driver NPN transistor , the base od the transistor may have input such us from circuit of infrared to control the distance, or with some other input.
After the transistor was input  and the collector had output a voltage of the switch relay will work, and voltage that in switch relay ready to use. To cut off switch eliminates enough voltage input at the base transistor , the collector will not remove the voltage , and switch are automatically disconnected.

1W Audio power amplifier circuit

LA4145 an IC with SIL-9 package and manufactered by SANYO. This ic has miraculous equation with LA4146 and LA4147, so if you do not have the IC LA4145 but you have IC LA4146 or LA4147 , you still can make the above amplifier circuit. The circuit includes circuit of classes on low power because it has low output is 1W with 8 ohm impedance.
Technical information :
Min. Voltage = 6 Volts
Max. Voltage= 12 Volts
P. Out            = 1 Watt
RL                 = 8 Ohm
Ft                  = 40Hz - 17 Khz
Icco              = 10 mA

You can use to  :
Tuner/ Radio
Mini VCD/DVD
Walkman
Ipod/Ipad
Mp3, Mp4 player
etc.

Transistor checker tool with circuit

The above sequence is a circuit of development of the transistor circuit tester before, which of course added few more components , and resulting in even be better. Examiners transistor circuit above only knows his gain is only on the collector . In addition to well known techniques of data materials used therein . That is , if the elements germanium and the like which are in the tool is still functioning or vice versa.
Part List :
R1=330R/0,5W
R2=27K
R3=1K
R4=1K
R5,R6=5K6
C1=1uF
C2=2,2uF
Q1=Socket transistor
T1=Transformator output (OT)
S1=Switches friction
G1=3V
X1-1,
X1-2=Speaker connector

How to test :
Emitter associated with foot condensator and resistor R4, Base is connected with one leg transformer OT , The Collector is connected to the foot of R2 and R3. If you hear a hiss , the sound in few seconds it still has not changed means that transistor still disqualify technical data.

Transistor quality checker

Transistor are the components that have never missed on any electronic circuit . To determine whether the quality is still good or is damaged then need for testing of the transistor . This test is needed before it is installed in an electronic circuit to avoid disappointing results in the future. Thus , all transistors are mounted has been declared unsuitable for use . Please note that th e damage was not located from the transistors can not stand the temperature is too hot . Therefore emphasized here for use tongs as a heat barrier when soldering each feet transistor.

Part List :
R1=47R
R2=100R
R3=Resistor with adjustable  to the current
Vr1=10K trim
Q1=Transistor socket
S1=Saklar on/off
G1=3V battery

To facilitate testing , the provided holes for the third feet on the transistor Q1. At thefoot of the emitter is connected to the battery (+). Base associated with Vr1, and the collectors associated with R2. The voltage (-) that enter the R3 give ampMeter to check quality of the transistor.

Radio signal interference detector circuit

This circuit is  good for finding component causing incidence trouble voice at radio-set of receiver. Have been realized that in this time a lot of radiation of broadcaster which cannot be arrested by radio receiver limpidly. Sometime - sometime original voice lose to be swallowed  trouble - other voice trouble. So long as in installation each every real correct component, circuit will function properly . Besides can be used for look for the source of voice trouble . This appliance can be made to look for trouble at radio receiver which  not sound at all .

Part List :
R1=220K
R2=4K7
Vr1=100K
Vr1=100K
C1=10pF
C2=1uF
C3=1uF
L1=100R
D1=OA70
Q1=BC327
Q2=TIP42C
S1=Switch On/of
G1=6V battery
Tp=Test Pad
SP=Speaker connector

To determine the level of interference , then the required injector which is connected with one leg and foot trimpot polar + diode crystal. To be more easier then made the switch as circuit above, the switch is derived from the meeting  trimpot legs that are associated with positif leg crystal diode. If the above circuit detects interference on the radio voice of the speaker issued a hiss. From here  can know which areas that emit a hissing sound , it means that components should be replaced. If all the components and the radios have been checked with injector there are no sound problems , but if the radio is turned on there are disturbances that the tool is not working, and you should check back this radio interference detection circuit.

Saturday, February 26, 2011

Fish caller electronics circuit

For those of you who like fishing, this circuit is very suitable for you implement, because it can call the fish and collect a lot of fish so it is easy to provocation and get a lot of fish. Vibrations are excluded from this circuit reaches a distance of several meters in a circle. You can use the river, of where many fish that are easy to find except at sea the waves are fast , so this circuit will not work because it lost by the waves of the sea .Actually , can also be used at sea was calm but the water should not be too choppy.

Part List:
C1   = 10nF
C2   = 47uF/16V
VR1= 5K
R2   = 470R
S1    = Switch On/off
Q1   = BC160
T1   = Transformator Output (OT)
G1  = 3V battery

How to use  the Fish caller circuit :
Ater the circuit is finished and sounds biased, then put inside the bottle and sealed for later when inserted in the water is not damged. After the circuit was put into bottles and then put into water, wait several seconds after the switch on/off button. After this circuit work the fish will come and surround this tool. And when it's like that then it's time to fishing.

Booster amplifier circuit

The above circuit is a circuit of booster amplifiers or amplifier end of a power amplifier circuit, Circuit over in the most important influence whether or not , and many more are affected in this final series.  Because the booster circuit is the amplifier end of the work was too heavy components causing the rapid component of the heat. If we are wrong then consequences will install components that can cause fatal damaged direct component , such us the installation of pin emiter, collector , and base everything must be correct. In the circuit above can strengthen booster amplifier with maximum work and everything is evenly split, what is it evenly split ? evenly split the point here is that all components can work with the same voltage and the heat evenly , this is because at each respetive base transistor were given the same constrains and same wattage resistor. And to maintain if the power output is too large then the resistor on Re will hamper so that the transistor is not easily broken.
Part List :
Rb=10R/1W
Re=0,5-1R/5W
Q1=Transistor power NPN such us 2N3055 , TIP3055,TIP120,TIP142,2SC2922 , etc.
Q2=Transistor Power PNP such us MJ2955 ,TIP2955,TIP125,TIP147,2SA1216, etc.
X1=Voltage connector (-)
X2=PNP Base connector
X3=Speaker connecor but also must be connected from the buffer
X4=NPN base connector
X5=Voltage connector (+)

Friday, February 25, 2011

78XX and 79XX stabilizer circuit with mini PCB design

Here I present the stabilizer circuit of the IC 78XX and 79XX commonly used for voltage stabilization with a mini PCB design , and practical. In the picture above is looking from top the PCB, with a width of 2 cm and 5 cm height. For input voltage can be directly through the AC because i've put it four rectifier diodes are then forwarded to the Elco and IC , that has a stable output in accordance with IC series. What if the IC series 7805 and 7905 , the output voltage of 5 Volts. If the series IC 7812 and 7912 then the output voltage of 12 volts , and so on. See circuit schematic below :

Part List :
D1,D2,D3,D4 = 1N4007
C1,C2             = 1000 uF/50V
C3,C4             = 470 uF/50V
IC1                 = 78xx series
IC2                 = 79xx series
And this is PCB design look from bottom :
 
PCB design by SIGMA4-Madiun

Audio amplifier circuit with IC STK0039 (good quality amplifier)

Although the output of which was issued in this circuit only 35watts maximum, but th esound can be issued harsh , loud , and clear. If the voltage is fit and clean , how to assembly , components are good , the right speakers , this circuit will definitely make a sound that good to hear the ear.
See audio amplifier circuit  below :

Technical Information :
Vcc Max = 45V
Vcc TYP = 30V
Po            = 35W
RL           = 8Ohm
Icco TYP = 40mA
Icco Max = 80mA
I Max      = 10A
The amplifier can use to : tuner , subwoofer surround amplifier , surround amplifier , subwoofer system , car amplifier , PC amplifier , DVD/CD amplifier , Room amplifier . Because this amplifier good quality amplifier circuit.

Power amplifier circuit with IC LM386

IC LM386 is working for the amplifier audio circuit with a low power output , range from 0.325 watts to 2 watts with impedance 8 ohm. In this circuit requires voltage of 12 volts to the maximum work, and maximum current 3 Amp.
Components List :
R1=33K / 0,25W
R2=1K / 0,25W
R3=10R / 1W

C1=100n
C2=0,1uF/35V
C3=100uF/16V
C4=220uF/35V
C5=4,7uF/16V
IC1=LM386

Connector Instruction:
X-1  = Input , connect to output
X-2  = Input Ground
X1-1= V+ , 12 Volt DC
X1-2= V-/ Ground
X1-3= Speaker+
X1-4= Speaker-

TDA2822 made for 5.1 audio amplifier system

Circuit combination of the 3 IC TDA2822  above can be used for 5.1 audio power amplifier system with low power output . The input signal used is analog signal not digital (SPDIF) , so it needed some input to the jack input. The speakers are suitable for use have impedance 8 Ohms , and with power 4 Watt, to Left , Right , Rear pair , center , and subwoofer speakers. To run this circuit , is also required circuit for volume control as tone control.


Component and technical Information :
C1-C6 : 220uF/25V
C7-C9 : 47uF/16 V
IC       : TDA2822 x3
CON-1: VCC +12volts DC
CON-2: Ground
CON-3: Left Speaker
CON-4: Right Speaker
CON-5: Rear Speaker
CON-6: Rear Speaker
CON-7: Center Speaker
CON-8: Subwoofer Speaker
X1-1:Ground
X1-2:Subwoofer Input
X1-3:Center Input
X1-4:Rear Input
X1-5:Rear Input
X1-6:Right Input
X1-7:Left Input

See this Printed circuit board below:

circuit and PCB Design use Cadsoft Eagle Software

Thursday, February 24, 2011

USB to phone battery charger circuit

Without any  USB to phone battery charger circuit we can charging phone battery using port on USB computer , but it will quickly damage the phone battery, and the battery will bulge. Because the voltage which was issued on usb is 5 volts , while the average-voltage phone battery 3.5 - 3.7 volts. That's why this USB to phone battery charger circuit is required , this USB to phone battery charger circuit reduce votlage to 3.7 volt usb, but will not reduce currents and  will make a durable phone battery.
USB to phone battery charger circuit diagrams
List of components :
R1 : 1 K
R2 : 330 R
R3 : 4K7
R4 : 300 R
R5 : 27R
D1 : 4.7 volt zener /1W
C1 : 100uF/16V
Q1 : BC548
Q2 : BC558A
LED1 : Green Led
X1-1   : Vcc USB
X1-4   : Ground USB
X2-1 , X2-2 : To phone battery
See also this printed circuit board ( PCB ) of USB to phone battery charger :
USB to phone battery charger printed circuit board

Wednesday, February 23, 2011

Phone Battery Charger circuit


The circuit above is a simple circuit to charge phone battery . Charge battery uses an output transformer secondary voltage fast-flowing with 9 Volt 350 mA. First voltage 220/110/120/240 VAC 50/60 Hz , will be reduced to 9 volts,
then rectified by 4 diodes 1N4007 and then flowed to light Led voltage power resistor 1 kOhms inhibited. + directly to the battery volltage and voltage - across 47 Ohm resistor and Led charge indicator which is inhibited resistor 100 Ohm then directly to the phone battery.

Tuesday, February 22, 2011

-15 Volt output regulated power supply circuit

The circuit above get from -20 volt DC the rectifier diode which is fed to the collector of the Darling pn pass transistor , a TIP105 . The diode use IN4007. The base drive to the TIP105 is supplied through resistor R5. The base of the TIP105 is driven from Vz terminal at pin 9 , which is the anode of a 6.2 -V zener diode that connects to the emitter of the uA723 output control transistor.
The method of providing the positive feedback required for foldback action is shown. This technique introduces positive feedback by increased current flow through resistor R1 and R2 under short circuit conditions. This forward biases the base emitter junction of the 2N2907 sensing transistor , which reduces base drive to the TIP105.

+15 V output regulated power supply circuit with uA723 and 2N3055

The supply receive from 220 /120/110 Volt AC , then lowered by the transformer . Then receives +20 Volts DC from rectifier / filter section. This applied to pin 11 and 12 of the IC uA723/LM723 , as well as to the collector of the 2N3055 series pass transistor. The output through R1 and R2, providing about 7 V with respect to ground at pin 4. The reference terminal at pin 6 is tied directly to pin 5 , the non inverting input of the error amplifier . For fine trimming the output voltage , a potentiometer can be installed between R1 and R2. A 100-pF capacitor from pin 13 to pin 4 furnishes gain compensation for the amplifier.
Base drive to the 2N3055 pass transistor is furnishes by pin of the uA723. Since desired output of the supply is 1 Ampere, maximum current limit is set to 1,5 Ampere by resistor Rsc whose value is 0,422 Ohm. A 100uF electrolytic capacitor is used for ripple voltage reduction at the output. A 1 kOhm output resistor provides stability for the power supply under no - load conditions. The 2N3055 pass transistor must be mounted on an adequate heatsink.

Dual Tracking regulator circuit

A IC MAX634 inverting regulator is combined with a IC MAX630 to provide a dual tracking approximately 15 Volt output from a 12 Volt DC battery. The reference for the - 15 Volt output is derived from the positive output via R3 and R4. Both regulators are set to maximize output power at low battery voltages by reducing the oscillator frequency , via LBR, when V Batt falls to 8,5 volt.
Technical instruction :
Max. Input voltage    : 13 Volt / N/a mA
Max. Output voltage :-15 Volt , + 15 volt / 45 mA

Low power audio amplifier with IC TA7066P

The TA7066P is original monolithic Intregated Circuit Audio Power Amplifier. Package IC is SIP10-16 and manufactered by TOSHIBA.  The above sequence is a series of low-grade intregated circuit amplifier , which was very small output . But this amplifier is very high impedance power output. For more details , see description below.
Technical information :
Min. Voltage   : 8   Volts DC
Max. Voltage  : 25 Volts DC
Max. Power    : 0,3 Watts
Impedance      : 150 Ohms
Min. Currents : 2,8 mA

Stereo Audio Amplifier with IC TEA2024

 The circuit above is based on IC TEA2024, package IC is SIP2-10 and manufactered by THOMSON. Circuit above can be applied anywhere as long as the speaker must be required , do not use powered speakers, it will make this circuit of hot , especially on the IC. So the use of powered speakers with the power output of this circuit.
Technical Information :
Minimum voltage : 6 Volts DC
Maximum voltage: 18Volts DC
Power Output       : 2 x 7 Watts
Impedance           : 4 Ohms
Currents               : 35 mA

14 Watt car audio amplifier circuit

Basic operation of this amplifier is on IC TEA2021 ,
In this circuit minimum require voltage is 4 volts and maximum voltage 25 volts. Power output 14 Watt with 4 Ohm impedance. See this schematic.

Monday, February 21, 2011

Low battery detector circuit

You feel confused to detect wether a battery is low or high, or you want to be notified if the battery and has expired , this circuit can detect if a battery has begun to decrease its strength. Circuit is based on LM4250 IC is able to detect if the battery runs out and will issue a notification signal.

Battery charger circuit

This cahrger based on chargeing voltage 2,4 Volts per cell , in accordance with most manufacterers recomendation. This circuit pulses the battery under with 14.4 Volts ( 6 cells x 2,4 volts per cell) at a rate 120 Hz.

Variable charger circuit

Indeed the accu charger circuit , the voltage required must be in accordance with voltage batteries , such accu 12 volts the the output voltage should not be above 12 volts and 12 volts should not be too down. If it does not comply with the required voltage , it will make the batteries or accu quickly broken. But not to worry to find the right voltage to charge to accu, the voltage control circuit is equipped to facilitate in determining the voltage.
Transformer
Primary : 33 turns #22
Secondary : 45 turns #22
Core : Ferroxcube 203 F 181.3C3

Unique amplifier circuit schmeatic based on IC TDA7255

This circuit equipped with 2 switches that are useful for loudness and filtering, on SW1 as the loudness , SW2 as a filter. It also equipped with direct  adjust of sound on Potentiometer 10k , but only useful as a master volume.
Minimum Voltage  : 8 volts
Maximum Voltage : 18 volts
Maximum Power   : 2 X 13 Watt stereo
Impedance Power  : 4 Ohms

Schematic Power Amplifier with IC TDA7370

Here..... this circuit is stereo power amplifier , based on IC TDA7370, its nice Intregated Power amplifier , He does not have hre slightest sound buzzing , although power amplifiers without additional reinforcement , such as filters , tone control, etc.
Voltage                      : 9 to 24 volts
Max. Power Output  : 2 x 20 Watts
Impedance                : 4 Ohms

TDA7240 / TDA7241 amplifier schematic

On this circuit based at IC TDA7240A , this circuit require minimum voltage 8 volt and maximum voltage 18 volt DC. Max power output 40 Watt with 4 Ohm impedance. this circuit can use to Amplifiy the audio device. See the circuit schematic below :

Sunday, February 20, 2011

Low voltage audio amplifier circuit from 0,9 volts

Here i share power amplifier based on IC TDA7236 . This amplifier require minimum voltage 0,9 volt and maximum voltage is 1, 6 volt , its very low voltage amplifier. You can use this amplifier everywhere just with one battery 1,5 volt. Power output 16 mW with 32 ohms impedance. see circut below :

Saturday, February 19, 2011

1 W low power audio amplifier circuit

This circuit based on IC TDA7233 or you can use  IC TDA7233D . Minimum supply voltage 1,8 volts  and aximum voltage 15 volts. Power Output 1 Watt with 1 Ohm impedance. This circuit include mute switch, which allows you to the mute sound completely.

1,6 Watt intregated circuit audio amplifier

This Circut based on IC TDA7231 , Minimum voltage require 2 Volts and maximum voltage 15 volts . I recomended voltage is 12 volt DC. Power output 1,6 Watt with 4 Ohm impedance. See audio amplifier with IC TDA7231 below :

Tone control mono circuit with C828 / C945

This is mono circuit tone control , include adjusting bass , trebel , and master volume. Minimum voltage require 15 volt and maximum voltage 45 volts.See schematic and construction below :



Master mixer circuit with one potentiometer

This circuit is used for controlling the volume of output  and then entered the mixer, but this circuit not only as the volume setting. This circuit also serves to reduce noise , and increase the gain  at the signal coming from the output. See schematic , PCB line ,and construction below
 
Master mixer circuit

Looked Down
Looked Up

Friday, February 18, 2011

OCL 150 Watt with 2N3055 and MJ2955

This is OCL 150 W mono audio amplifier circuit , with impedance 8 Ohms. The supply voltage using 25 volt DC with triple voltage + ,- ,ground. see below this circuit :
Buffer amplifier use PNP transistor is A564 / A733 /A1013 and NPN use D400 / D438. Driver Amplifier use NPN transistor is TIP31 / TIP41 / D401, and PNP transistor use TIP32 / TIP42 / B546. For the transistor booster or end , here I use a 2 x 20355 and MJ2955 . This anplifier is recomended to full range speakers. See pcb line and construction audio amplifier below :
Click to view larger

PCB line
Components are already installed


The booster amplifier already installed.

600W subwoofer audio amplifier with 20 channel mixer and parametric

This picture below is about my setup subwoofer amplifier with 20 CH mixer and parametric. This amplifier use transformer 10 ampere to supply the power and 3 ampere transformer use to supply mixer and parametric.Elco capacitor that i use for the transformer 10 A, only 10000uF numbered 2. The circuit of amplifiers that i use which is 600 watt mono subwoofer amplifier . And booster amplifier only use 2 Sanken transistors. See picture subwoofer amplifier assemblies below :
Looked over the side
Front view

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