Monday, April 16, 2018

DIY KIT Voice Spectrum Lights 8x8 LED Red/Green/Blue

DIY KIT Voice Spectrum Lights 8x8 LED Red/Green/Blue
Hello elcircuit friends, this time I will post make audio spectrum circuit using LED 8x8 Red / Blue / Green. This circuit you can directly assemble because on icstation.com site is available. Which makes it easy for DIY'ers to create a KIT Audio Spectrum complete with acrylic case. The schematic circuit also you can see below.
DIY KIT Voice Spectrum Lights 8x8 LED Red/Green/Blue

For more details, you can see the video below is complete with KIT, also by testing this circuit of voice spectrum lights

To assemble this kit the things that need to be considered so that these kits can function properly is:
  • Plug the resistors, capacitors in accordance with the existing label on the PCB.
  • Install 47ohm on the label RY1 - RY8, RX1 - RX8
  • Install correctly MIC, The negative electrode of the MIC is connected to the metal case The positive pole is not connected
  • Plug it correctly foot transistor S9014, do not upside down base legs, emitter and collector.
  • Pay attention to the direction of the integrated circuit
  • Plug the led properly the long pin is the positive When installing, please keep each transverse or each vertical one in the same color.

To buy this Audio Spectrum 8x8 Red/Green/Blue DIY Kit Level Indicator w/ Acrylic Shell Voice Spectrum Lights visit here: ICSTATION

Sunday, April 08, 2018

10A 70V SMPS for Power Amplifier

Before the making of Gacun SMPS circuit for a power amplifier, we must know in advance what it is Gacun. If you are an electronics hobbyist who often dabbled with Power Supply TV, then you will not be familiar with Gacun module.

Kit / Module Power Supply Gacun is a very innovative breakthrough. Can be applied to any regulator including TV, as long as the transformer is still good. With this kit, the technicians are very helpful to replace the original regulator circuit.

In this article, we do not discuss more deeply about how to apply/install Gacun for TV regulator, but we will make power supply amplifier by using Gacun module which I will share what kind of Gacun circuit module itself. Which I have previously published on how to create an SMPS circuit with a poison module in this article: Switching Mode Power Supply 10A 20-50V DC CT

The following is an SMPS circuit 10A using Gacun more detail:
Switching Power Supply For power amplifier circuit using UC3843 IRFP460 K3911
Component List:
R4= 22R
R5= 1K5
R6= 39K
R7= 3K9
R8= 1K
R9= 820R
R10= 220K
R11= 0,1R - 0,22R 5W
R12= 5K6
R13= 220K 2W
C1= 100N 275V
C2= 220uF 400V
C3, C4, C8= 10N
C5, C6= 1uF 50V
C7= 2N2
C9= 22N
C10= 10uF 50V
C11= 47uF 50V
C12= 1N 400V
C13, C14, C15, C16= 1000uF 100V
D5, D6= 1N4148
D7= Zener 12V 500mW
D8, D9= MUR8060
BR1= Diode Bridge KBU4M
TR1= EMI Filter from TV PSU Circuit
TR2= Gacun Trafo MK201609
TR3= Primary Winding: 45Turns 0,6mm , Secondary Winding: 14Turns CT 14Turns 0,8mm. Core transformer using from former tv power supply.
IC1= UC3843
Q1= IRFP460, K3911

Examples of the finished Gacun SMPS circuit:
SMPS Gacun Power Supply for power amplifier circuit

Saturday, March 31, 2018

DIY Stereo Yiroshi Power Amplifier 1400W

DIY Stereo Yiroshi Power Amplifier 1400W
This my second project for Yiroshi Power Amplifier Circuit, power amplifier circuit is indeed very super quality, many have tested the strength of this Yiroshi power amplifier. Power amplifier yiroshi is suitable for outdoor or indoor. Previously I have made this yiroshi amp circuit in the mono version. I have also tested it in the unboxed state of the box, using only 2SC2922 and 2SA1943 final transistors, this amplifier is capable of high enough power until my speakers are damaged and also my smps is damaged This power amplifier is tough enough, none of my final transistors parallels broken.

here is the circuit scheme of the stereo power amplifier yiroshi, the scheme below is still the same with the yiroshi circuit that superpower driver before, only later will replace the transistor previously used TIP3055 and TIP2955 I replace it with transistor 2SC5200 and 2SA1943. Because the previous transistor has only a maximum voltage of 60Volt with a maximum current of 15Ampere, so it is advisable to use a larger transistor maximum voltage and current. If for 2SC5200 and 2SA1943 transistors this is enough for me, maximum CE CE voltage up to 230V and maximum current up to 15 Ampere.
stereo power amplifier yiroshi NJW0302 NJW0281
In the above circuit scheme is a combined stereo of two series of yiroshi power amplifiers, so to list the components to make it easier for you to buy, please just look at the previous post here Yiroshi Power Amplifier Circuit.

To make it easier for this yiroshi amplifier circuit you can use this PCB Layout design:
PCB Layout design for stereo power amplifier yiroshi.

PCB Final Transistor Parallel for stereo amplifier yiroshi driver.
PCB Layout transistor final for yiroshi amplifier

I have made this stereo yiroshi power amplifier circuit, but this is still in the test process stage. and it turns out for PCB Layout for the driver you have to reverse the position of all transistors, so the same face with the top component layout. Later you will be able to see the location and position of the transistor, after the power amplifier is finished and ready to be produced.

For the final transistor, on this yiroshi stereo amplifier project, I do not use transistor Toshiba 2sc5200 and 2sa1943 as well as sanken transistor 2sc2922 and 2sa1216.

I am using transistor NJW0302 and NJW0281, the transistor price of NJW0302 and NJW0281 is almost same as Toshiba transistor 2sc5200 and 2sa1943.

Both transistors both have 150Watt power output, and IC 15Ampere but for VCEO and VCBO are different, a 20Volt difference is higher transistor NJW0302 and NJW0281, where the maximum voltage is 250Volt.

The following is a final transistor picture of NJW0302 which is embedded in the PCB:
transistor NJW0302 and NJW0281 VS 2SA1943 2SC5200

And this is the final transistor image I've paralleled using the PCB Design layout above.I am using 14 pairs of NJW0302 and NJW0281 transistors and for per channel yiroshi driver I use 7 pairs of transistors.
Parallel final transistor NJW0302 NJW0281
Already tested power amplifier yiroshi I will supply with 20Ampere 60Volt Switching Mode Power Supply 
Stereo Yiroshi power amplifier high power amp circuit


Download File PCB Layout.PDF
PCB Stereo Yiroshi Amplifier
Transistor Final Top
Transistor Final Bottom

Sunday, March 25, 2018

DIY 500W Class-D TL494 Switching Amplifier

Power Amplifier Class D using TL494 IRF N Channel mosfet
In this project, I will share about class-d power amplifier using TL494 IC for PWM, and use N-Channel MOSFET transistor as the final amplifier. This circuit is not so complicated and cheap to make practice making power amplifier class-d. This power amplifier circuit can be supplied with 30V to 100V DC asymmetric power supply using 8VDC bias voltage up to 12VDC. For the output power of this amplifier can generate power up to 500Watt, pretty good is not it? to make this power amplifier please see the circuit schematic of TL494 Power Amplifier below along with PCB Layout design that you can download in the form of .PDF format.
TL494 Power Amplifier Class-D SMPS Audio PWM to Audio
Part List:
C2, C3=1N
C4, C6=10uF/50V
C7, C9, C10=220uF-1000uF/100V
C8= 100N/400V
C11, C12= 1uF - 4u7F / 400V
Q1= MJE350
Q2, Q3=MJE340
Q4, Q5= IRF540, IRF460, IRF250, IRF 4227 N-Channel Mosfet
U1= TL494, TL494CN
L1= 22uH - 35uH
J1= Audio input
J2= Bias Voltage 8-12V
J3= +V 30- 100V DC
J4= Speaker Output

Below the PCB Layout Design for Power Amplifier Class-D TL494, You can download and print the PDF file:
PCB Power Amplifier TL494 Class-D Amplifier PWM SMPS Audio
Download PCB.PDF: PCB Power Amplifier TL494

DIY Power Amplifier class-d high power amplifier
In the picture above is when PCB I etching using Ferichloride and shake it into the container. For more details, I will update the video complete making this class-d power amplifier using TL494.

Tuesday, March 13, 2018

Power Amplifier 1000W Rocky TEF

Hello friends, this time I will share project about Power Amplifier with the name of Rocky TEF power amplifier with output power up to 1000 Watt RMS. With high power category, this amplifier is capable of controlling 12Inch speakers A total of 4 even 6 pieces with each speaker power of 300W. The following is a project of making this Rocky TEF power amplifier, starting from circuit scheme, PCB Layout, and also there is video assembly, also testing power amplifier.

Power Amplifier Circuit Diagram:
Power Amplifier 1000W Rocky TEF
Component List:
R1= 47K
R2, R5= 1K8/1W
R3= 33K/1W
R4= 15K
R6= 27K
R7= 1K
R8= 47K/1W
R9= 6K8
R10= 10K
R11, R12, R13, R14= 100R/1W
R15, R16 = 22R/1W
R17, R18=220R/5W or 470R/2W x2 Parallel
R19, R20= 2R2/W
R21, R22= 120R/5W or 220R/2W x 2 Parallel
R23, R24= 22R/2W
R25, R26= 10R/5W
C1= 10uF/50V
C2= 120nF
C3, C4= 220uF/80V
C5, C6= 120pF
C7, C8= 470pF
C9= 100nF/275V
D1= Diode Zener 33V
D2,D3,D4= 1N4007
Q1,Q2,Q3,Q4= MPSA92/ 2N5401
Q5,Q6,Q7,Q9= TIP31/ 2SC4793
Q8= TIP32/ 2SA1837
Q10, Q12, Q15= 2SC5200
Q11, Q13, Q14= 2SA1943
L1= 10uH
J1= Input
J2= V+ 45 - 70V DC
J3= V- 45 - 70V DC
J4= Emitter
J6= Base +
J7= Base -
SP= Speaker Output

PCB Layout Design Power Rocky TEF 1000W
Power Amplifier 1000W Rocky TEF Rockola Expandable
PCB Size: 120mm x 80mm

Making PCB Power Amplifier Rocky TEF [VIDEO]

Wednesday, March 07, 2018

Subwoofer Filter NE5532 Schematic PCB

On this occasion, I will share the circuit for subwoofer filters in this subwoofer filter different from the previous filter or subwoofer module. In this circuit only use 3 pieces of Op-Amp IC which we usually encounter in tone control circuit, active crossover, a filter circuit, another preamp circuit that is IC NE5532. This IC is very popular so I will apply it to this filter subwoofer circuit and its circuit schematic.
Subwoofer Filter NE5532, Bass Booster
In the above circuit, there are three settings for the subwoofer filter frequency, where the frequency can be filtered from 50Hz up to 300Hz. This frequency setting is on a 50K stereo with a FREQ label, then also there for subwoofer phase settings that we can use ranging from 0 to 180 degrees. Phase settings contained in Phase 100K pot. then the last is the level setting or also can be called the volume subwoofer, which is used to set the amount of voice signal to be transferred to a special power amplifier bass/subwoofer. Level settings contained in the 50K pot Level.

Buy NE5532 IC for this filter circuit from allchips.ai, see image and link below:
To facilitate the making of this filter subwoofer circuit I also share PCB Layout design below, with the size of PCB 107mm x 69mm.
PCB Layout Subwoofer Filter NE5332

DIY Subwoofer Filter Circuit

This Subwoofer Filter NE5532 is tested with Power Amplifier SOCL 504, see this video:

Sunday, March 04, 2018

Speaker Protector 3 Transistors

This speaker protector circuit serves to protect the loudspeaker from the DC voltage that flows from the power amplifier, especially from the type of OCL power amplifier. In fact the working system of the protector speaker circuit is simply delaying the connection between the amplifier and loudspeaker output for a few seconds. When the power amplifier is first turned on, there is usually a momentary voltage surge at its output. The problem is this surge voltage is a DC voltage which is of course dangerous when it flows on the loudspeaker. Below the circuit diagram of speaker protector it's using 3 transistor.
Speaker Protector Circuit 3 Transistor

82R x 1, 1K  x 1, 8K2 x 2, 10K x 1, 47K x 2, 68K x 1, 180K x 1
100uF/35V x 4
1N4148 x 2, 1N4001 x 7, LED x 3
Relay 8 Pin DPDT
Transistor & IC
7812 x 1, 2N5551 x 3
PCB Layout Design:
Speaker Protector PCB Layout
The workings of this protector speaker circuit is as a delay or also timer for the speakers that will connect to the amplifier when pwoer amplifier is turned on, as I have explained above. and the above circuit is used for stereo channel which only use 3 transistor as timer controller, and also not less important is the capacitor. If you want to change the working speed of the timer in the circuit you can replace the capacitor 100uF/35V near the 68K resistor, besides you also change the resistor itself. If the capacitor value gets bigger and the resistor gets smaller, the timer will longer work for the relay, and vice versa.

Video Assembling

Friday, March 02, 2018

4500W High Power Class-D Amplifier D4K5

Power Amplifier Class D D4k5 1000W 4500W

This High Power Amplifier circuit is a class D power amplifier, which has a high enough power to generate 3000W of power at 4 Ohm impedance - and also more power up to 4500W at 2 Ohm impedance. This Power Amplifier can generate great power if given enough power supply. For example, you can use 30A transformer with 100V symmetric voltage.  Here is the circuit scheme of High Power Class-D Amplifier D4K5:
Power Amplifier Class D D4K5 4500W Circuit Diagram
View larger schematic image here: Power Amplifier Class-D D4K5

Component List
R1, R3, R4, R9, R13, R18, R19, R20= 1K
R2, R16, R39= 100K
R5, R6= 10R
R7, R8=6K8/2W
R10, R21, R26, R27=4K7
R11, R17=6K8
R14, R15=4R7
R22, R23, R24, R25, R31, R33=47R
R28, R29, R30=0,1R/2W
R36, R38=22R/2W
RV1=10K Trimpot

C3, C4=1N
C7, C9, C11, C12, C13, C15, C16, C18, C19=100N MKP
C10, C14, C17=100uF/16V
C21, C22, C23=220N/475V
C24, C25, C26=470uF/180V
C27, C31, C33=100N/275V
C28, C29, C30=470uF/180V

D1, D2, D5, D10, D11= 1N4148
D3, D4= ZD5V6
D6, D18, D19= MUR460
D8= ZD5V6
D12,D13,D14,D15,D16,D17= 1N5819

Q1= 2N5401
Q4, Q6= BD139
Q5, Q7= BD140
Q8, Q9, Q10, Q11, Q12, Q13= IRFP260

U1= TL071
Q2= CD4049
Q3= IR2110
U2= NE555
U3= LM311
Class d power amplifier circuit
ir2110 irfp4227 mur460 mur860 cd4049 tl071

The Power Amplifier is using view components and this power amplifier include OCP, DCP. And using 6x N-Channel Power Mosfet. You can use IRFP260, IRFP4227, IRFP4242 and others. If you want to make this power amplifier, see the following PCB Layout Design
PCB Layout Class D 4500W power amplifier
View larger PCB Layout Design: PCB Class-D D4K5
DOWNLOAD PCB .PDF: PCB Layout Design Class D D4K5

How to make Class D Power Amplifier [VIDEO]

High Power Amplifier Test Class D 

Below step by step how to make yourself PCB board for this power amplifier [VIDEO]

Friday, February 23, 2018

Subwoofer Amplifier with Power SOCL 500W

In this project, I will make a special power amplifier for the subwoofer speaker that I use for a power amplifier circuit that is Power SOCL 500W which use 2SC5200 and 2SA1943 final transistor 1 set/pair. Then for my subwoofer preamp use 4558 subwoofer filter/ 4558 subwoofer module. For power amplifier and subwoofer filter, each requires different power supply voltage. This power amplifier can be supplied with power supply from 25V to 63V DC Symmetrical. And for my subwoofer preamp circuit use 15V regulator power supply using IC 7815 and 7915

The power supply of subwoofer preamp needs stable starting from 12V to 15V recommend from me. Above 15V, the filter subwoofer circuit can generate buzzing noise or even damage the IC 4558. It is recommended to use 12 or 15 Volt regulator power supply, which will make stable voltage so good for sound and component itself. The following circuit scheme for subwoofer power amplifier using SOCL + preamp subwoofer.
Subwoofer Power Amplifier Circuit

In the circuit scheme to get more details the circuit please click the link that is in the first paragraph. For the circuit connection, you can see in the schematic above, there is a power supply voltage connection, where the power supply for the preamp subwoofer is taken from the output of 7815 and 7915 while the input of the regulated power supply is taken directly from the symmetric voltage of the power amplifier. You can take the voltage + and - only, while the ground is connected to all circuits.
15V Regulated Power Supply Video Schematic, PCB design

Wiring Circuit for PCB
Power SOCL 500W Subwoofer Amplifier

For input sound signal output that enter from the media player, go first to the subwoofer filter circuit and will be forwarded to the power amplifier, so the output of this SOCL power amplifier becomes a low tone which is good for subwoofer speakers.

This subwoofer power amplifier circuit is very satisfactory, which can control 12-inch subwoofers with ease. See the following SOCL power subwoofer amplifier videos, making amplifier and test with subwoofer speaker.

Subwoofer Amplifier with Power SOCL [VIDEOS]

Wednesday, February 21, 2018

Clip Indicator for Power Amplifier

Clip Indicator for Power Amplifier Circuit
There are many indicator clip circuit on the internet, with various models and design, starting from the easy to the hard. But in this article let us discuss the circuit of clip indicators that are easy and simple to be made with the advanced function of the clip indicator itself.

Clip Indicator power amplifier is a tool for detecting limits or clipping of audio signal power amplifier. Why should be installed clip indicator tool? Actually, this is the accessories and additions to make the power amplifier, so it is not installed is not a problem. I think this Clip Indicator Circut is very important because we can monitor the maximum limit of the out power amplifier so there will be no overdrive that can cause the sound broke and damage the speakers.

Clip indicator circuit is very simple and we can make it yourself easily and cheaply. Below is a circuit diagram of indicator clip for power amplifier:
Clip Indicator Power Amplifier
Component List
R4, R5=15K
D1=LED (Green)
D2=LED (Red)
D3=LED (Yellow)
D4, D6=1N4002/1N4148
D5=ZD 15V 500mW
J1=1: Ground 2: Input 3:+V Amplifier
Q1, Q2=C945/C828

PCB Layout Design Clip Indicator Power Amplifier
Clip Indicator PCB Design
Download link: 

How to Connecting Indicator Clip Circuit
This circuit requires a supply voltage that we can take from a positive supply power amplifier, so do not need additional power supply again. For clip indicator connection position on PCB power amplifier. My power amplifier PCB take example use PCB power Yiroshi Amplifier. For other PCB power I think it same, just different position of the layout only. Here is the image clip indicator connection on PCB power.
Clip Indicator Connecting circuit

The ground terminal of the PCB Clip Indicator is connected to the ground amplifier. Then Input Clip Indicator is connected to Output Speaker Amplifier. And for V + from clip indicator connected to voltage V + power amplifier. Led Signal detects incoming audio signal, Led Power indicates Power On and for Led Clip indicates output from power amplifier overdrive or maximum limit.