Monday, April 25, 2016

3 Channel Equalizer Using LM324

How to make 3 Channel Equalizer settings? Come along follow this circuit.
Here I will post about 3 channel equalizer circuit using LM324 IC as the main amplifier in tone. The 3 tone is the tone of bass, treebel, and middle. Quite simple by setting the tone at a frequency of 108Hz - 108kHz. Equalizer circuit is working on asymmetric voltage 12 Volt DC, to produce a good sound quality and with low noise, required power supply voltage regulated properly.
The following circuit and its PCB design.

3 Channel Equalizer Using LM324 circuit diagram

3 Channel Equalizer Using LM324 circuit diagram

PCB Design 3 Channel Equalizer LM324

PCB Design 3 Channel Equalizer LM324
Thus the circuit 3 Channel Equalizer Using LM324, this circuit can be made cheaply and affordable and requires only a few components. If you want to ask about the circuit above, please make a comment in the comments box below. And See also other equalizer circuit

Mono 150W OCL Power Amplifier

OCL power amplifier circuit used in this circuit is a power amplifier type of OCL (output capacitor Less) with a power output of 150 Watts [Stereo 15W x 2 = 300w]. The Circuit of 150 Watt power amplifier OCL works in class AB with symmetrical VCC voltage source of 25 volts DC to 32 volts DC [If the transformer wear CT18V up to 24V 5A]. OCL power amplifier circuit using a 150 watt power transistor complementary TIP 2955 / MJ2955 and transistor TIP 3055 / 2N3055. 150 watt power amplifier in the circuit can be used to drive a load (4-16 Ohm loudspeaker). Power supply power amplifier circuit can use power supply circuit symmetrical current 5A. This Mono Circuit Diagram , if you need stereo you can multiply this circuit.

Mono 75W OCL Power Amplifier Circuit Diagram

Mono 75W OCL Power Amplifier

PCB Design Stereo 150W OCL Power Amplifier

PCB Design Mono 75W OCL Power Amplifier
PCB size : 11.5 cm x 15 cm Pertinax material and paint can be used circuit production / solder dip.
To increase the performance and tone control, this stereo tone control circuit is suitable for power amplifiers above.

Updated Video test 150W Power Amplifier 32V with TIP3055 TIP2955:

Sunday, April 24, 2016

Super Bass Power Amplifier 2SC2922-2SA1216

This power amplifier same as Power Amplifier 500W but the difference on the components used ,so will result super bass amplifier. Power amplifier circuit is very nice used for subwoofer applications with powerful bass tones. Power is quite high power amplifier, power power issued about 500 Watt. With sustained by the buffer circuit and the drivers were very fitting for a booster transistor 2SC2922 and 2SA1216 which will emit high power. But if you want to reduce the output power you can use transistor 2N3055 and MJ2955. check on the search engines for the transistor datasheet.

Super Bass Power Amplifier Circuit Diagram

Super Bass Power Amplifier 2SC2922-2SA1216

Above is a schematic of the circuit power amplifier super bass. For the power supply voltage, you can supply the voltage 32 volts DC to 48 volts DC.

And I have prepared for assembly pcb layout design. So it will be easier for you to assemble this Super Bass Power Amplifier.

PCB Layout Design

PCB Layout Supwer Bass Power Amplifier 2SC2922-2SA1216PCB Design PCB Layout Supwer Bass Power Amplifier 2SC2922-2SA1216

Wednesday, April 20, 2016

Auto Soft Start for Electronic Device

This circuit auto soft start is function as a reducer load input voltage AC 220V, When the voltage will go first to an electronic device such as a TV / Fridge / Iron / Water Pump / Electric Motor and etc. which require high power, the load on the power supply 220V automatically be high, this could lead to blackouts for excessive electrical loads. Besides this circuit also function as Power Saver Electricity, to lighten the burden of electricity, the electricity needed is not so much and will save on your electric bill.

Auto Soft Start Circuit Diagram Include PCB Layout Design

Circuit Diagram of Soft Start for electronic device

Line PCB design and layout  Auto Soft starter :

Soft Start for electronic device
PCB Soft Start for electronic device

Bridge Car Amplifier with TDA7560

TDA7560 4X50 Watt quad bridge car audio power amplifier

Bridge Car Amplifier with TDA7560

TDA7560 is a breakthrough BCD (Bipolar / CMOS / DMOS) technology class AB audio power amplifier in Flexiwatt 25 package designed for high power car audio. The fully complementary P-Channel/N-Channel output structure allows a rail to rail output voltage swing which, combined with high output current and minimized saturation losses sets new power references in the car-audio field, with unparalleled distortion performances.

4X50 Watt Bridge Car Amplifier Circuit TDA7560 ic amplifier audio amplifier circuits  

Bridge Car Amplifier with TDA7560 circuit

555 timer chip tester

555 timer chip tester
IC 555 timer tester is a simple circuit that serves to test the condition of IC 555. 555 timer circuit tester, in principle, start the timer 555 in astable multivibrator mode. As an indicator of the status of the timer 555 good condition or damaged to use 2 pieces LED which will light up in a blink alternately when the timer 555 in good condition. 

And only one will turn on or off all the timer 555 when the condition is broken. 555 timer circuit tester is powered using 9 Volt DC voltage source. Complete circuit tester 555 as follows.

tester schematic circuit 55
Tester schematic
How to use 555 timer tester is in conjuction with IC 555 to test the existing IC socket according to the orderbutton. Then activate the power switch to begin testing the 555 timer ic. Then live we observe the LED indicators 2buah before, whether flashing alternately (good) or not blink or even die all (timer 555 damaged).

TDA7012T - Single chip FM received

TDA7012T - Single chip FM received
FM Radio Receiver IC TDA 7012T is very simple, but Radio This FM receiver has good sensitivity and selectivity. Single Chip TDA 7012T FM Receifer is to build an FM receiver requires a few additional components.

Feature contained in FM receiver IC TDA 7012T is quite tempting to an FM receiver. Among features an FM receiver TDA 7012T is a low-voltage applications micro affability arrangement (MTS), Frequency Loked Loop (FLL) to 76 KHz range and selectivity of FM receiver with RC Filter. In an article by FM Radio Receiver IC TDA 7012T can be seen in the FM receiver circuit which can be made​​.

FM received Schematic
TDA7012T- Mini FM received Schematic
Part List
R1 = 8kΩ2
R2 = 10kΩ
R3 = 390Ω
C1,C3 = 10nF
C2,C6,C9,C16 = 100nF
C4 = 33pF
C5 = 25pF trimmer
C7,C10 = 1nF5
C8 = 820pF C11 = 1nF
C12 = 68pF
C13 = 220pF
C14 = 47μF 10V
C15 = 3nF3
L1 = 36nH
L2 = 1μH,
IC1 = TDA7021T

Tuesday, April 19, 2016

70W Mosfet power amplifier

70W Mosfet power amplifier circuit

There are possible alternative input stage transistors, the Toshiba 2SA970BL and 2SC2240BL, which appear to be good substitutes for the Hitachi 2SA1085E and 2SC2547E. The ‘BL’ suffix is the high gain group. Alternatives for the Sanyo 2SC2911 and 2SA1209 are the Toshiba 2SC3423 and 2SA1360.

70W Mosfet power amplifier Circuit Diagram

70W Mosfet power amplifier

This 70W power amplifier is designed for quality rather than quantity, and if much higher power is really needed there are other more suitable design approaches.

This is an awesome amplifier circuit, and this is the older version�(MJR7-Mk3). There is new version released (MJR7-Mk5) for better quality and performance, just go to THIS PAGE for complete circuit explanation.


2SC5200 and 2SA1943 high fidelity power transistor

2SC5200 and 2SA1943 transistor amplifier
Here are two transistors manufactured by Toshiba. 2SC5200 and 2SA1943 transistor pair has been widely applied or used in the amplifier power amplifier because the transistor has a large power, and also not too expensive than other large power transistors. This transistor has the advantage of High breakdown voltage: VCEO = 230 V (min), Suitable for use in 100-W high fidelity audio amplifier's output stage. For more information, please see datasheet below.

Maximum Ratings (Tc = 25°C)

datasheet 2sc5200 and 2sa1943

Electrical Characteristics (Tc = 25°C)

characteristics transistor 2SC5200 and 2sa1943

Sunday, April 17, 2016

STK465 Stereo Power Amplifier 2x30W

A STK465 Stereo Power Amplifier of acoustic frequencies can be there manufactured with apparent supplies, despite is common so much the difficulties of conclusion of resources, I beg your pardon? the difficult of regulations. These difficulties are overcome relatively without difficulty if we locate amplifier modish form fulfilled.

Completed STK465 is an amplifier circuit of acoustic frequencies to offers qualitative output, using nominal outdoor elements. Substantially he is lone of bulky complete force. Has a line pins and incorporated metal rise on behalf of adaptation in cooler. The provision pins in a line, facilitates the placement complete inwards the point printed and his support in cooler. The circuit functions in a big range of remuneration of catering, from 20V seeing that 60V, and it attributes 30WRMS, at what time the tendency of catering is higher than 50V and composer resistance of loudspeaker is the 4 or else 8 Ohm. The catering ought to be real symmetrically.

while it functions with tendency 56V it follows that the tendency self-control be ± 28V since meant for the ground. With this recommended tendency of catering, the attributed force is 30 WRMS hip charge 8W. The consequences of malformation is acceptable and oscillates around in the 0,08% for force of expense from 1W until 30W. Curve response his it is extended from 10Hz and reaches 100 KHz, with divergence 0dB and -3dB in that order, measured in force 1W. Using evolved techniques, concluded amplifier STK465, can minimise the deformities even in the field of highest levels of force. Other naturally to facilitate determines the finished circuit they are: the broad area and the exalted aid.

 STK465 is drawn to remain constant, whilst it functions in conjunction clogged bronchi with enormous collect. equally all the amplifiers, hence and this, under certified unfavourable conditions, can seizure happening oscillations. These oscillations say as answer of recurring in the same stage from the exit in the opening, or else from bad wily PCB, or else from bad superior of corridors in the circuits of entry. as soon as you entice a printed circuit, it is critical to return the current of charge and the current of show of entrance arrived the ground, via dissimilar corridors. usually, conclusive is the charge it is connected unswervingly in pin the catering and in meticulous in collective pin electrolytic the catering. If statement and charge are connected directly in the 0V via the same road, so therefore are produced retroactions, pardon? receive in the same way as consequence oscillations and the abnormality. To you we propose maintaining as much as potential slighter the cables of ground 0V and the capacitors of unharnessing, so with the aim of are some degree of the results of self-induction and resistance of outline of copper PCB. on occasion the oscillation is allocated during great time taken drivers involving way in and expense, particularly if these allow big length and the dense resistance of source are superior. Can anticipate the oscillation with the aim of is to be paid in extended wirings, accumulation capacitor from 50 - 500pf relating pins access. in favor of the low abnormality, of the essence role the stage furthermore the placement of conductors of catering. This be supposed to be present reserved the same as much as likely additional far from the wiring of entrance, so with the purpose of is deterred in this way the not linear catering stylish the entry of IC.  STK 465 does not boast technique of thermal protection, so to facilitate are avoided the thermal elations. If the hotness of JC reaches in from head to foot outlay, at that time the amplifier changes the polarisation of rung of expense. If the heat is increased, then in order to is ensured the business it ought to you grow cooler. The amplifier functions with catering of lookalike polarity. into form 1 we envision the electronic circuit of amplifier so as to Is based on the STK 465.

STK465 Stereo Power Amplifier 2x30W Circuit Diagram

STK465 Stereo Power Amplifier 2x30W

The STK465 Stereo Power Amplifier circuit is stereo and has two channels of amplifier in a nutshell. It is a strict manipulative to facilitate develops positively all the particularities completing. Concretely, we observe that the not inverting access fulfilled (pins 2 and 15, pro all channel), is supplied from dividing wall of tendency, which ensures tendency from the tendency of expense completing. next to the same period with the application inwards apiece channel, exists a capacitor 470uF, which achieves the unharnessing, in to it concerns the AC components of climax frequency, while en line a capacitor 1mF allows in the amplifier to be situated supplied from advantageous show acoustic frequencies, fence simultaneous the unremitting piece. Bronchi unharnessing it is realised with the help of networking of two resistances 33KW and 330W and a capacitor 100mF, which to end with ensures dynamic of aid equal with 100. Finally, by the same occasion with the exit exists networking RC (0,1mF - 4,7 Ohm) to it attends to the minimisation of phenomenon  crossover.  The amplifier can survive supplied from a line of doppelganger polarity. Still it can function under a open region of tendencies (±10V for instance ±28V). The supplies of current depend from the force of expense and it can they instigate from 120mA up to 1A. It is very foremost the catering to stay adequately unharnessing, so with the aim of is avoided imports of maddening noises.

Parts :
R1= 1K C1= 1uF/35V R2= 3,3K C2= 470pF R3= 100 C3 = 100uF/60V R4 = 330 C4 = 100uF/60V R5 = 3,3K C5 = 10uF/60V R6 = 1K C6 = 47uF/60V R7 = 0,33 C7 = 8,2pF R8 = 33К C8 = 0,1uF R9 = 4,7 C9 = 1uF/35V R10 = 1К C10 = 470pF R11 = 3,3К C11 = 100uF/60V R12 = 100 C12 = 100uF/60V R13 = 330 C13 = 10uF/60V R14 = 3,3К C14 = 47uF/60V R15 = 1К C15 = 8,2pF R16 = 0,33 C16 = 0,1uF R17 = 33К R18 = 4,7 IC1 = STK465 LS1 = Speaker 40W 8 or 4 Ohm

Fan control temperature using sensor LM35

Basic circuit of the LM35 are made to control the fan is either used on amplifier that requires automatic cooling. Its use on power amplifier circuit above and only requires DC fan. From basic sensors based on ic and amplifier op-amp is added again to the transistor Q1 to drive the fan.

Fan control  temperature using sensor LM35 circuit diagram

Part List :
R8___33R 4W
F1___DC Fan 12V

Basic LM35 temperature sensor circuit

 This is basic of  working circuit of LM35 temperatur sensor, whish is taken from the LM35 spending and boosted again by the amplifier op-amp. High output if the sensor is received by ic LM35 high temperature . You can use the output as driver relay, fan , or other. And if yo want to see modifications LM35 temperature sensor see here.

 working circuit of LM35 temperatur sensor

Temperature protection using PTC and LM393

Used as a protective circuit above uses a component named PTC , the components in the operating obstacles , but obstacles desert PTC component is influenced by temperature, whereby if the cold temperatures of less than 100 degrees celcius , then this component has a few obstacles. And when temperature run to 100 degrees celcius or higher, which is owned PTC resistance will rise ass well. Because it depends on ambitient temperature , the PTC can be assembled into a circuit protection if high ambitient temperature, tand automatically switchess off, circuit like a schematic above.

Temperature protection using PTC and LM393

Part List :
TH1__PTC thermistor

Saturday, April 16, 2016

Low power amplifier with IC TA7140

Low power amplifier with based on the IC (intregated circuit) TA7140 manufactered by TOSHIBA , its have original output power is 0,15 Watts, and the schematic diagram is monolithic power amplifier.Though the amplifier circuit has a low output , but the maximum voltage large enough to 30 volts.
Low power amplifier with IC TA7140 circuit diagram
Low power amplifier with IC TA7140 circuit diagram

Part List :
Resistor     = 100R
Capacitors = 4u7F , 33uF , 100uF , 1000nF , 4700nF , 47uF
IC              = TA7140P

Technical information :
Max. Voltage = 30 V
Min. Voltage = 5 V
Max. Output = 1 W
RL                =  150 Ohm

Versatile and simple power supply

Versatile and simple power supply is one of several series of power supply many other well-known, because making a fairly easy circuit power supply is also nice, versatile addition also can be used on any circuit, for example, Radio tuner, Intregated power amplifier circuit, etc. . But we need to know the Versatile and simple power supply is not used to charge the battery because it will quickly damage the transistors that exist. To have a good output voltage, use of quality components.
Versatile and simple power supply
Versatile and simple power supply
Part List :
R1 = 1K
C1 = 0.22uF 275V
C2 = 4700uF 50V
C3 = 100n
C4 = 220uF
C5 = 1000uF
Q1 = TIP30
T1 = Step-down Transformer 220V to 12-35V

Portable Battery Charger Circuit

This circuit was designed to charge Nicad battery packs in the range of 4.8 to 15.6 V from a convenient remote power source , such as automobile battery. When power is first applied to the circuit applied to the circuit , a small bias current supplied by R1 via winding L1 , starts to turn on the transistor TR1.

Portable Battery Charger Circuit Diagram

portable battery charger acircuit diagramThis forces a voltage across L2 and the positive feedback given by the coupling of L1 and L2 causes the transistor to turn hard on , applying the full supply across L2. The base drive voltage induced across L1 makes the junction the necessary base current to hold Q1 on.
Component List

R1 = 1M
R2 = 120R
R3 = 10R
R4 = 39R

C1 = 100uF 25V
C2 = 0.01uF
C3 = 4700pF
C4 = 100uF 25V

D1 = 1N4148
D2 = BYV27-5
D3 = BYV27-5

Q1 = ZTX650

L1 = 12T 36awg
L2 = 13T 36awg
L3 = 20T 30awg
L4 = 40T 30awg
Core FX3437 with gap of 0.08mm
Former DT2492

Super Boost USB Charger Circuit

This design is inspired by the Minty Boost but it fixes some of the issues that I had with it. The Minty Boost is limited to 600mA due to the LT1302 chip. The Super Boost uses the LM2700 which can push up to 3.6A. This will enable i-devices to draw up to there maximum of 1A which will enable a faster recharge.

Super Boost USB Charger Circuit

STK013 Power Amplifier

On the amplifier circuit using ic STK 013, the same as my previous posting. However, in this circuit has 2 inputs and 2 outputs, or commonly called a stereo amplifier. This issue of power amplifier 2 x 18Watt and has impedance 8. That it takes about 35-38Volt.

STK013 Power Amplifier
stk 013 amplifier
Component list :
R1 =  390K
R2 = 390K
R3 = 220K
R4 = 220K
R5 = 220K
R6 = 220K
R7 = 100R
R8 = 1R
R9 = 9.1K
R10 = 9.1K
R11 = 1R
C1 = 10uF
C2 = 10uF
C3 = 0.47uF
C4 = 0.47uF
C5 = 220uF
C6 = 0.047uF
C7 = 4700uF
C8 = 100uF
C9 = 1000uF
C10 = 100uF
C11 = 4700uF
C12 = 470uF
C13 = 0.047uF
U1 = STK013

12V to +/- 20V DC Converter

100 Watt 12V to +/- 20V DC Converter Circuit
DC To DC Converter circuit used to be an convert  voltage DC to DC with different concepts. DC to DC converter circuit +12 V to + /-20V is working to change the battery voltage from 12V DC to 20V DC voltage symmetrical. DC to DC converter circuit is often applied to the power amplifier udio on car audio systems. DC to DC converter circuit uses a TL494 IC as power plsa for the converter. 

TL494 IC is a PWM controller with an adjustable frequency from 40-60Hz through a potentiometer. Then from the TL494 PWM signal is given to the driver MOSFET inverter TPS2811P to be given to the power inverter with 2 units of MOSFET transistors. Circuit details can be seen in the figure following the DC to DC converter.

DC To DC converter circuit +12 V To + / - 20V 

12V to +/- 20V DC Converter Circuit Diagram
Click to View Larger

List Components DC To DC Converter +12 V To + / - 20V
  • R1, R2 = 10 
  • R3, R4, R6, R7 = 1k 
  • R5 = 22k 
  • R8 = 4.7k 
  • R9 = 100k 
  • C1, C2 = 10000uF 
  • C3, C6 = 47 u 
  • C4 = 10U 
  • C5, C7, C14 = 100n 
  • C8, C9 = 4700u 
  • C12 = 1N 
  • C13 = 2.2u 
  • U1 = TL494 
  • U2 = TPS2811P 
  • Q1, Q2 = FDB045AN 
  • D1-D4 = 1N5822 
  • D5 = 1N4148 
  • FU1 = 10A 
  • L1 = 10U 
  • L2 = ferrite BEAD 
  • RV1 = 2.2k 
  • RV2 = 24k 
  • T1 = TRAN-3P3S 

DC To DC converter circuit +12 V To + / - 20V is capable of supplying up to 100W and can power supplying currents up to 3A. In making DC To DC Converter +12 V To + / - 20V has to be careful and cautious because there are parts of DC To DC Converter +12 V To + / - 20V in the form of an AC circuit.

700W Power Amplifier with 2SC5200, 2SA1943

700W Amplifier Adjust the amplifier power 700W looks calm, but we requirement not put out of your mind to the adjustment happening forcing transistors, the whole relating to-engagement of frequency offset. It is compulsory to change the current insurance rule which serves to guard the final transistors.

Their tendency to happen allowable to keep the transistors in the SOAR characteristics. primary it was needed to evaluate all the necessary resistors and subsequently measured to verify the accuracy of the calculations, it is managed with satisfactory results.

Peripheral changes required in support of it to be there able to consistently amplifier to supply power. - First you need to restore the 2k2 resistors stylish string with the LEDs on Zenerovými resistors with upper wattage. be enough 1/2W resistors, power loss next to 80V +-based 1W. - therefore was traded 1k2 resistor in the pointer resistor by the side of 620 ohms. 

700W Power Amplifier with 2SC5200, 2SA1943
700W Power Amplifier with 2SC5200, 2SA1943 Circuit Diagram
Which is the initial reap has doubled, so at this point is the overall gain amplifier 40 and the limit excitation is sufficient to 1V rms. - Předbudiči transistors were replaced by stronger MJE15032/33 since KF467/470 are permitted satellite dish current 20mA - by the side of the exciter output stages are used the same transistors for example the output stage. - add up to of terminals of transistors has been increased to eight pairs - It had to occur to compensate designed for the excitation level by calculation a capacitor 10pF to 47pF + 22K appendage.

This led to a slight "gradual" amplifiers, but this did not affect the ensuing parameters. This power is tuned correctly in support of this type of terminal transistors 2SA1943/2SC5200. 

With with the purpose of it is a least assessment next to which the amplifier operates stably exclusive of pass by the side of the rising and falling edges of the genuine. - The ultimate adjustment, the adjustment terminal current protection transistor.

The final transistor characteristics shows with the intention of the most allowable radio dish current once the voltage of 1.5 A is ideal in favor of cooling, so it's essentially not as much of. Therefore, the current protection is customary to 12A, single-arm.

This impersonate protection SOAR transistor characteristics. curt-circuit current is regarding 6 A which is about 075A for every transistor. This is far beneath the SOAR characteristics. The mechanical design is relatively clear-cut, the transistors are placed on the two cooling profiles with a height of 66 mm, width 44mm, overall part 260mm.

They are twisted contrary to each one other in this way, from the cooling tunnel. Coolers are attaching the nylon aid which allows the compilation of transistors exclusive of washers, and thus better conveying tepla.DPS amplifier next to the top of the tunnel and the transistors are soldered from the underside of PCB.

700W pcb power amplifier

Friday, April 15, 2016

Power Amplifier IC KA2203, SN16975, TBA820, UL1482P

For this time I will post circuit diagram power amplifier based on IC KA2203, SN16975, TBA820, UL1482P. Which has 4 Watt power output with 4 Ohm impedance. At least 8 Volt supply voltage and a maximum of 20 volts.

Power Amplifier IC KA2203, SN16975, TBA820, UL1482P circuit diagram :

Circuit power amplifier KA2203 , SN16975, TBA820, UL1482P Part List
R1 = 100K
R2 = 56R 
R3 = 56R
Use 1/2 W resistor
C1 = 47uF
C2 = 100uF
C3 = 100uF
C4 = 470uF
C5 = 470pF
C6 = 0.22uF
C7 = 100uF
U1 = KA2203 , SN16975, TBA820, UL1482P

Car Power Amplifier using PA02

high power car audio amplifierThis is a power amplifier which functioned as the car audio amplifier IC that uses PA02 and LH0101. That each IC has a 30W output power with 8 ohm impedance.

Part List 
R1 = 10K
R2 = 0.15R
R3 = 20K
R4 = 2.7R 1W
R6 = 15R
R7 = 10K
C1 = 0.1uF
C2 = 0.1uF
C3 = 0.1uF
IC = LH0101 , PA02

Car Power Amplifier using PA02 circuit diagram

high power car amplifier circuit diagram

Supply voltage from 7 volts to 25 volts. For a car battery can also be used but must be first converted into voltage +, -, and ground. 

Power Amplifier Component placement design

Box amplifier
Here I will share about the arrangement of Power Amplifier Component placement design. That where the components are a series of audio amplifiers that use relatively large components, which consume a lot of places in the box to the amplifier.

But in this post I just gave inspiration only in the arrangement, or design place for neat, clean and have good audio output as well. please see image below.

component arrangement design
1.AC 220V terminal
2.Switch on/off
5.Capacitor elco
6.PCB kit amplifier
8.Master Volume
9.Terminal input output.

Then this is the image of the booster amplifier using 2 sets of Sanken 2SC2922 and 2SA1216 transistors, which has a high output power.

high power transistor

High voltage regulator circuit

High Voltage regulatorIn this circuit of essentially the same principle with the power supply, but power supply is working to produce high voltage High Voltage regulator . And high voltage which is regulated by this series becomes more filtered and either used for electronic devices that are not easily damaged.

High Voltage regulator schematics

High Voltage regulator
Component List
C1_____________39uF 450V
C2_____________39uF 450V
C3_____________39uF 450V
C4_____________39uF 450V
C5_____________10uF 25V
C6_____________220nF 250V
C7_____________100nF 400V

Sunday, April 10, 2016

35 Watt power amplifier with STK4065

35W amplifier schematic
Amplifier circuit using ic STK4065 above that which the power amplifier circuit uses only ic, or also could be called this series do not have equality in the use of ic. Power amplifier output power 35 Watt supplied with a voltage of 13.5 volts DC. Impedance of the output is 8 ohms. that can be applied to the speaker subwoofer, woofer, and fullrange.

Component list :
R1 = 2,2R
R2 = 2,2R
C1 = 1uF
C2 = 100uF
C3 = 100uF
C4 = 220uF
C5 = 470uF
C6 = 0.47uF
C7 = 220uF
C8 = 33pF
C9 = 220uF
C10 = 33pF
C11 = 0.47uF
U1 = STK4065

50W Car Subwoofer Amplifier Circuit

50W Car Subwoofer Amplifier Circuit
The Car Subwoofer Amplifier 50W Circuit was posted by the side of trendy kind Amplifier. Please examine carefully and look on circuit design pictures of Car Subwoofer Amplifier 50W Circuit to catch aspect in sequence.
50W Circuits Car Subwoofer Amplifier
50W Circuits Car Subwoofer Amplifier 

This car stereo amplifier with TDA1562Q  output 50W of audio power can using for car subwoofer system.
Complete Component list  :
2 resistors 1 KOhms
2 resistors 4,7 KOhms
2 resistors 100 KOhms
2 resistors 1 MOhms
4 capacitors 470 nF LCC 63V
4 capacitors 10 µF 63V radiaux
6 capacitors 4 700 µF 25V radiaux
2 capacitors 100 nF LCC
1 capacitor 10.000µF 25V radial
2 x LED
2 x TDA1562Q
2 switches unipolaires
2 heatsink (Rth < 2.5°C/W) (+ pasta termica)

Sound Processor with 555

Easy sound processor provided here is an ultra-simple circuit module suitable for nearly all primary electronics and microcontroller initiatives. As an instance, this module may be used as a the front-result in an electronics mission to stumble on and technique ambient sound in an green manner. Even much less-skilled hobbyists will discover the development of the circuit on a preferred motive published circuit board a reasonably smooth affair, in view that there is no at a loss for words wiring and all additives are housed at the board. As the circuit has no essential adjustment points it is straight away prepared for real-world packages.

Sound Processor With 555 circuit diagram

The acoustic sensor within the circuit is a preferred omni-directional foil electret microphone (mic). Sound indicators picked up by means of this microphone is processed by  bc547b transistors (t1 and t2). Pre-processed alerts from this segment is linked to the monoshot brick found out using the famous ne555n chip (ic1). The whole module may be powered from any popular five volt dc supply. Pins 1 and a pair of of the 3-pin jst connector (j1) denotes vcc (+5v) and gnd (0v) connections respectively, even as the very last 3rd pin works because the digital signal output (do) pin.

IC 555 generates a PWM signal

Here is a very simple ic 555 oscillator that generates a PWM signal. in this case, i am using a 2n3904 NPN transistor (Q1) as a switch to turn an led on and off. you can also use this to run a dc motor or other heavy load hardware. make sure you use a switching transistor that can handle the voltage and the current you require.you can pretty much use this circuit anywhere because with some modification, you can change the duty cycle limit and such,so i include a link at the end of this article for a ic555 calculator so you can modify this circuit to perfection.

What you will need:

  • 555 timer chip, it can be any variation of the chip like the ne555 or lm555.
  • 2x 0.1uf (micro Farads) ceramic capacitors.
  • 0.01uf (micro Farads) ceramic capacitor.
  • 200k R(kilo ohms) potentiometer ( or equivalent resistor voltage divider)
  • 10k R (killo ohms)
  • 350R resistor
  • 2n3904 npn transistorled with your choice of colour
  • 2x 1n5818 Schottky Rectifier diods
IC 555 generates a PWM signal

IC 555 Notes:
this circuit requires +3v min to +15v max input voltage. this circuit can have a seperate voltage source than the one used by the load (led), but as always they need to have a common ground.
Discharge pin on the 555 is the signal output.

Q1 can handle up to 200ma but anything higher than that and you will get magic smoke. always check your data sheet for your components limitations.
for example 200ma = 10 leds that require 20ma of current each
Q1 can be replaced with other transistors or even mosfet like tip31.

R3 and R4 act as a potentiometer as LTspice simulator does not have a potentiometer model. just use a 200k potentiometer. the potentiometer will act like a voltage divider.

D1 and D2 are the 1n5818, make sure they are pointing to opposite direction of each other.

as you can see in the pictures below, the circuit is producing PWM signals. fist picture is full duty cycle, second picture is half.
IC 555 generates a PWM signalIC 555 generates a PWM signal

Automatic Fuse Circuit

To restrict / security, electric current is usually used fuse or patron is dissolved when going short will drop out and must be replaced with a new one. Then, in order not to drop out of each new change means that more money out to buy, then there Automatic Fuse Circuit work with the reset button. So there are problems with each short, fuse will automatic decided flow then to return it does not need to buy a new (if not broken) just press the reset the equipment will live again.

Automatic Fuse Circuit

This is one of the simplest electronic
fuse circuit one can make. The circuit uses only one transistor, one SCR, one push button switch and two resistors.

The value of R1 can be obtained from the equation; [Imax] X [R1] = 0.7V.
R2 can be obtained from the equation; R2 = [Vs] X [1K Ohms].
Wattage rating of R1 can be obtained from the equation; W = [Imax] X [Imax] X [R1].
For this circuit to work the current consumption of the load must be greater than the holding current of the SCR.

The working of the circuit is very simple. Initially the load current flows through SCR and resistor R1.The value of R1 is so selected that, the maximum load current multiplied by the resistance of R1 is equal to 0.7 volts. When the load current exceeds the maximum value the voltage drop across R1 becomes more than 0.7V and switches transistor Q1 ON. Now the transistor completely bye passes the load current and the current through triac falls below the holding current. This makes the triac OFF. When SCR is OFF there will not be any current flow through R1 and so the voltage across it falls to 0.This makes the transistor OFF, completely isolating the load circuit.The fuse can be resetted by pressing S1.When S1 is pressed the SCR is again triggered and remains latched to conduct the load current.