Thursday, January 17, 2019

PCB Manufacture Process in JLCPCB Factory

Established in 2006. JLCPCB Factory is the earliest prototype and small-batch PCB production factory in China. Now, JLCPCB has four PCB manufacturing sites. Come with us on a tour of the PCB manufacture process for a 2 layer board to find out how a PCB is made and you will see the care and attention that we give to every step of process, from Production, Quality Control to Shipping. 

Step 1 From File to Film 

After orders are received online on JLCPCB ($2 for 10PCBs), customer supports pass the Gerber files to engineers for pre-production checking. After the file review is approved, the file can be plotted in our laser photoplotters and made into photomasks or films in a temperature and humidity-controlled darkroom. The photoplotter takes the board data and converts it into a pixel PCB image. The exposed film is automatically developed and unloaded for the operator. The films are ready for the PCB fabrication process


Step 2 Material Cutting

Starting as a large sheet, standard industry quality FR4 in 0.4/0.6/0.8/1.0/1.2/1.6/2.0mm thicknesses with a high-quality copper foil bonded to both sides - referred to as laminate - is cut to into all kinds of suitable sizes to make panels.

Step 3 Drilling 

Holes are drilled through the panel for component leads and vias where specified in the Drill File that EasyEDA generates as part of the Gerber file package. Extra holes are drilled around the edges of the panel to provide registration points to align the photofilms on the top and bottom layers on Step 5. This is to ensure that these pre-drilled holes will then appear exactly in the center of the pads and vias.

The drill machine is computer-controlled, the worker chooses the right drill program which tell machine which drill to use and how to drill on PCB. Many drill machines automatically loads and unload the panels at the completion of each drill cycle in 24 hours every day. There about more than 70 drill machines in one of JLCPCB factory

JLCPCB Drilling

Step 4 Copper Deposition

After drilling, the panels are cleaned and then they are placed in baths where, using an electroless deposition process, a very thin additional layer of copper is deposited over the whole panel including an even plating around the walls of all the drill holes to create what are called plated through holes. Almost all PCBs with two or more copper layers use plated through holes to connect the conductors between the layers. The entire process of dipping, plating, washing and drying is machine controlled.

JLCPCB Copper Deposition

Step 5 Image the outer layers

In the process of Dry Film etching, the whole board surface is first coated with a thin layer of photosensitive etch resist (“photoresist”), as a “dry film”. This resist layer is exposed to ultra-violet (UV) light through a photomask which masks off the required pattern of tracks and pads but allows the whole of the rest of the panel to be exposed to the UV light. Exposure to UV light polymerizes and hardens the photoresist. An unhardened photoresist is removed by “developing” to leave bare copper that will form the required pattern of tracks and pads clean and clear of photoresist. The panel is then baked to increase the durability of the remaining resist for the next process.

JLCPCB Image outer Layer

Step 6 Pattern Plating 

Following a stage of electroplating to increase the copper thickness on the exposed areas and inside the plated through holes, the exposed areas - again including inside the plated through holes - are then plated with a thin layer of tin. At the end of this step, all the remaining photoresist is removed leaving a panel covered in bare copper with only the tracks, pads and through holes covered in a thin layer of tin.

JLCPCB Pattern Platting

Step 7 Etching

The tin plating protects the sections of the panel meant to remain covered with copper during the etching stage. Etching removes the unwanted copper foil from the panel but leaves the tin plated areas unetched (apart from a small amount of side etching which is adjusted for by automatically increasing the track and pad widths to compensate during the original photomask preparation in Step 1). 

Next, the tin plating is chemically removed in a process that re-exposes the bare copper. so that the conducting copper areas, tracks, pads, and through-plated holes are now all that is left of the original overall copper coating on the panel. 

Step 8 AOI Inspection

Automated optical inspection(AOI) is an automated visual inspection for bare boards. An AOI is able to detect faults such as tracks with over etched edges or regions where the photoresist may have been scratched or chipped and so caused a notch in the track. Faults such as this are very hard to detect in an electrical continuity test.
The AOI system scans the layers using a laser sensor. The captured image is digitized, enhanced and then electronically compared with the original Gerber file. Using this comparison the AOI system is able to detect and highlight any defects or suspect areas far more swiftly and accurately than manual inspection.

JLCPCB AOI Inspection

Step 9 Solder Mask 

Solder mask is an epoxy coating applied to the bare printed circuit boards to prevent accidental solder bridging and protect them from the environment. Solder mask is usually green but many other colors are available, such as red, black, white, yellow and blue.

After another stage of cleaning, panels are loaded into the solder mask coating machine. This completely covers both sides of the panel with a solder mask ink. The panels are then put through a drier which hardens the ink just enough to allow it to be printed. Next, the “tack-dried” coated panels are imaged under UV light using a set of photomasks which, before exposure to UV, are checked to ensure that they are precisely aligned (to better than 50um) with the copper tracks and pads on the panel.  The photomasks are clear where the solder mask is to be further hardened and opaque where the solder mask is to be washed away in the “development” stage to expose the pads on the panel. 

The development stage strips off the unhardened and unwanted resist. To ensure that the exposed copper is ideally solderable, the panels are then inspected to ensure that there is no residual ink left on the pads or through the holes.  Even slight traces would compromise the solderability of the finished PCB. Lastly, the resist will be further hardened or “cured” to provide a permanent, hardwearing coating.

Step10 Silkscreen 

Silkscreen guides customers to better understand the board’s component layout.

In an automated process, Letters, numbers, logos, production date, and component outlines, as defined by the silkscreen layer file of the Gerbers, are printed on the top surface of the panel, using a white etch-resistant ink printed onto the board using a special type of ink-jet printer. If silkscreen is required on the bottom surface then the top surface ink is tack-dried before the board is turned over and the printing process repeated using the bottom side silkscreen file.

The panel is then cured again to finally harden off the solder mask and silkscreen inks.

JLCPCB Silkscreen

Step11 Surface Finish

During this stage, boards are plated with an electroless-gold-over-nickel (ENIG),  silver or hot-air-solder-leveled surface. The surface finish has two essential functions, to protect the exposed copper areas from corrosion and to provide a solderable surface when assembling (soldering) the components to the printed circuit board.

JLCPCB Surface Finish

Step 12 Profiling & V-cutting 

After surface finishing, panelized boards need to be shaped to suit enclosures via a computer-controlled milling or routing machine. With profiling, boards were usually finished to give a smooth edge once they are cut. Fast profiling methods allow the PCBs to be laid edge to edge and so gives the best panel utilization.

V-scoring/V-cutting is used for mechanical pre-separation of circuit boards. A V-shaped breaking line is formed in the circuit board with a precision cutting tool. These breaking lines permit the boards to easily be snapped out from the panel.
JLCPCB V-cutting

Step 13 Electrical test

We electrically test every multilayer PCB against the original board data. Using a flying probe tester we check each net to ensure that it is complete (no open circuits) and does not short to any other net.

JLCPCB Electrical Test

Step 14 Final Quality checking & Package & Shipping

All PCBs produced by JLCPCB are given an electrical connectivity test and a final visual inspection to ensure everything is OK before being packed and shipped.

JLCPCB Final Quality

This article sponsored by JLCPCB

Monday, January 14, 2019

High-End LM1876 Quad Amplifier Gainclone using High Quality PCB

LM1876 Quad (4 Channel) Amplifier Gainclone

Creating a power amplifier circuit for the high-end class AB using the LM1876 IC is in great demand among audio amplifier lovers. Amplifiers using the LM1876 IC have power up to 20W per channel, while the LM1876 IC has 2 input outputs so that it can output 20W + 20W per IC, with very low distortion compared to other amplifier chips. This LM1876 IC is the same as the LM1875 IC with the same audio quality produced. The difference is only in the number of output inputs and also features a mute and standby feature on the LM1876 IC.

You can use this amplifier for home theater or audiophile amplifiers, or it can also be applied to system power amplifier circuits 2.1 Stereo + Subwoofer using 2 ICs. And on this occasion, I will share the circuit and the PCB layout file for the LM1876 Quad amplifier circuit or 4 channel power amplifier using 2 ICs. Besides that, I have also completed the preamplifier circuit along with the power supply regulator for the IC op-amp. The Op-Amp IC that I use is dual type. You can use several types of op-amps such as 4558, NE5532, TL082, etc. Recommended power supply using +-25V with 5A Current.
Below is the LM1876 series of quad amplifier circuits:

Schematic LM1876 Quad (4 Channel) Amplifier Gainclone High-End
Part List
LM1876TF U1,U2 TF15B
1k R1,R3,R4,R5,R11,R13,R14,R15,R25,R26,R32,R33,R37,R38 PKG-0.25W RESISTOR
47k R2,R6,R12,R16 PKG-0.25W RESISTOR
10uF C1,C2,C9,C10 CAP-D5.0XF2.0
1000uF C3,C4,C11,C12 CAP-D16.0XF7.5
1uF C5,C6,C13,C14 CAP-CBB-23.0*8.0
100nF C7,C8,C15,C16 CAP-CBB-12.0*4.5
4.7Ω R7,R8,R17,R18 AXIAL-0.8
22k R9,R10,R19,R20,R24,R31 PKG-0.25W RESISTOR
555 U3,U4 DIP08
10k R21,R22,R28,R29 PKG-0.25W RESISTOR
4k7 R23,R30 PKG-0.25W RESISTOR
50k R27,R34 RES-ADJ_3296W
MKP 250V 2.2uF C20,C18,C17,C19 CAPACITOR-MKP250V-2.2UF
100NF C21,C22,C23,C24 100NF, 63V CAPACITOR
AKL701_3_15 X1 AKL701_3_15
BD140_C20604 Q1 TO-126
BD139 Q2 TO-126
Z12V D2,D3 ER_ZENER_12V_D0-35
22uF C35,C36 CAP-D6.3XF2.5
100uF C37,C38 CAP-D6.3XF2.5
100n C39,C40 100NF, 63V CAPACITOR
XHB-2A Connector P1,P2,P3,P4 XHB-2A
1M R39,R40,R41,R42 PKG-0.25W RESISTOR

PCB Layout LM1876 Power Amplifier Quad Gainclone
PCB Layout LM1876 Quad (4 Channel) Amplifier Gainclone High-End

How to get High-Quality PCB from JLCPCB 
First, you must download the Gerber file at end of this post.
If you have downloaded it via google drive with the .rar format, please visit the JLCPCB site here:

Here is the website homepage of JLCPCB, next login to your account or register if you don't have JLCPCB account.
JLCPCB website homepage

If you have already entered the account, click quote now. And then upload the Gerber Files
How to uploading Gerber files on JLCPCB

Uploading gerber files JLCPCB
Then select your PCB options such as number of PCBs to be ordered, PCB thickness, copper thickness, masking color etc.
PCB option at
Then click save to cart, and checkout securely, and you will be redirected to the page to fill in the shipping address, and shipping options and payment options. You can use a credit card or PayPal to pay it.
How to pay JLCPCB

The following is an example of a PCB that I have ordered from JLCPCB with a red double layer masking PCB, HASL (with Lead) surface finish.
PCB Review from JLCPCB LM1876 gerber files

Using a high-quality PCB from JLCPCB and using the Audio Grade component makes it possible to get good results for this LM1876 Power Amplifier. Apart from good sound results we also get a cool look too.

Gerber Files Power Amplifier Quad LM1876 High-End Audio
Bill of Materials Quad Gainclone Amplifier LM1876 .CSV

Wednesday, December 26, 2018

Powerful 2000W Power Amplifier Class-H

Class H Powerful amplifier circuit 2000W
Class H is an analog amplifier which aims to improve the efficiency of the amplifier B / AB class. In class B / AB, the supply voltage is only one pair which is often denoted as + VCC and -VEE for example + 24V and -24V (or written with +/- 24volt). In class H amplifiers, the supply voltage is multilevel. Especially for applications that require high voltage power, so that the supply voltage is efficient, there are 2 or 3 different pairs. For example, there is a supply voltage of +/- 154 volts, +/- 77 volts and +/- 12volt. For example, for soft and low sound, the active pair is +/- 77 volt supply voltage. Then if it is necessary to drive a loud sound, the supply voltage can be switched to a maximum supply voltage pair of +/- 154 volts.

And below the circuit for Powerfull 2000W Power Amplifier Class-H
Powerfull 2000W Power Amplifier Class-H Circuit

Resistor 1/4W
4R7 x 2, 33R x2, 10R x1, 47R x1, 68R x3, 100R x3, 180R x2, 220R x2, 270R x2, 470R x5, 680R x2, 820R x1, 1K x4, 2K2 x3, 2K7 x4, 4K7 x1, 8K2 x1, 10K x7, 12K x2, 15K x 1, 22K x1, 27K x2, 33K x2, 39K x2, 47K x1, 100K x3, 180K x1,
Resistor 1W
10R x1, 1K x1, 100K x2
Resistor 2W
5R6 x2, 22R x2, 220R x2, 2K2 x2, 4K7 x2, 6K8 x1, 47K x1, 56K x1
Resistor 5W
0.33R x15, 10R x1
500R x1

22pF x2, 27pF x1, 47pF x4, 220pF x6, 470pF x4, 1nF x 1, 100nF x1, 100nF/250V x4, 100nF/400V x3
Capacitor Elco
4u7/50V x4, 3300uF/50V x1, 10u/50V x2, 10u/250V x3, 33u/50V x1, 100u/25V x2, 100u/50V x2, 220u/50V x1

1N4148 x13, 1N4007 x4, HER205/1N4937 x3, 1N5408 x4, RHRP/ MUR1560 x2, LED x2, ZD5V1 x2, ZD6V2 x2, ZD15V x2, ZD15V/1W x2

NE5532 x1, 7812 x2

2N5551 x11, 2N5401 x5, BD139 x1, 2SA1837 x2, 2SC4793 x3, 2SA1941 x1, 2SC5198 x1, 2SA1943 x11, 2SC5200 x11

Relay 12V x1

For PCB layout class-H 2000W power amplifier circuit above you can use PCB Layout below, this PCB layout has worked well. If you need a layout. PDF you can download at the end of the post that I have compressed into the RAR file.
PCB Layout Power Amplifier class-H work
Schematic & PCB Layout Design Power Amplifier Class-H PDF

Friday, December 14, 2018

Power Class-D Full-bridge Amplifier - D2K PCB Gerber File

Power Amplifier class-d fullbridge D2K 2000 Watt
Before I share PCB Layout about full-bridge class-d power amplifiers with 2000W power I will tell you a little more about class-d power amplifiers.

Class D amplifiers are known as PWM (Pulse Width Modulation) amplifiers or Switching amplifiers which are now increasingly popular in use. Replaces the class AB amplifier that has been used a lot before

Then what is the D class amplifier like? And what are the advantages?

Class AB amplifiers have a relatively large "power dissipation" (loss of power) that requires a large amount of heat sink. The greater the power (Watt) of class AB amplifiers, the greater the cooling needed. Here there is more or less a power loss of about 25 ~ 40% which turns into heat, which must be removed through the cooler.

Class D amplifiers produce almost no heat so they don't need a cooler. The efficiency achieved is close to almost 100%, only requires a little space and a few supporting components, and of course, the price becomes cheaper. Only the INDUCTOR and CAPACITOR components of filters in class D eat a lot of space.

The working principle of Class D Amplifiers
Sound signal (audio) is a signal in the form of Sinus. Class D amplifiers first convert these sound signals into "ON-OFF" pulses (such as switching) with "period length" which can change as shown below (indicated by Vo). Therefore class D is also called PWM (Pulse Width Modulation)
To change the input signal in the form of a sine to a PWM signal, a triangle oscillator is used and a comparator as shown below.
Then the PWM signal is amplified using the Gate drive amplifier and an amplifier Output using the FET (MOSFET).
The output signal in the form of PWM pulses is then converted back into a sine signal using "Low Pass Filter" (which consists of Lf + Cf) before being to the Speaker.

The following is the PCB layout of a Power Amplifier Class full D2K bridge with a double layer layout:
PCB Layout Power Class-D Fullbridge Amplifier - D2K

Part List Power Class-D Full-bridge Amplifier - D2K:

Core T157
22 uH = 2

10 ohm (1/4 watt)=10
100 Ohm (1/4watt)=5
470 ohm (1/4 watt)= 3
1k Ohm (1/4 watt)=4
1k2 =1
3K3 (1/4watt)=2
4k7 (1/4watt)=16
6K8 (1/4 watt)=3
10k (1/4watt)=14
47k (1/4watt)=2
15k (1/4watt)=4
22k (1/4watt)=1
33k (1/4watt)=1
100k (1/4watt)=7
220k (1/4watt)=1
4r7 (1 watt)=2
10 ohm (2watt)=4
10K (2Watt)=1
10 ohm/5watt=1
1k /5watt=2
5k6 (5Watt)=2
0.1R (5Watt)=4

Capasitor milar/mkm/mkp
105/400v =2

Mur 460=7

10uf/16v Nonpolar=4

IRFP250/P260/ IRFP4227=4

CD4070 /4030=1



The problem and input for this full-bridge amplifier.
  • 2x Core MS157060, 19 turns for 90Vdc. 4x157060 14 turns to supply 90Vdc to 130Vdc
  • Mosfet IRFP4227 for supply 90Vdc. IRFP4229 / IRFP4332 / IRFP4242 / IRFP4768 / IXTQ76N25 for supply 120Vdc. Another Mosfet is not recommended.
  • If you have installed the components according to the PCB it still does not sound, all the installation has been checked correctly then 99% is certain there is a defective component. The often defective component is logic 4030/4070. Both Op Amp, third IR2110 / IR2113
  • The supply voltage is required to fit the recommendation.
  • The recommended load impedance is 4 ohms or 8 ohms. Because the feedback loop and LPF have been maximized.
  • Installing a supply with low voltage causes a clip and causes the amplifier to break down.
Video Build and Tested Power Class-D Full-bridge Amplifier - D2K

PCB Layout Power Amplifier Class-D Fullbridge D2K PDF

See Also Class-D D4K5

Saturday, December 08, 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]

Thursday, December 06, 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

Wednesday, December 05, 2018

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 1000W of power at 8 Ohm impedance - and also more power up to 2000W at 4 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]

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

Video updated Double Layer PCB from JLCPCB

Thursday, November 29, 2018

PCB Layout Class-D D2K FB (Full Bridge) 2000W

Class D2k Full bridge Power Amplifier. Amplifier class D with 2000 watts of power at a 4 ohm load. and 3000 watts at a load of 2 ohms. As long as the power supply supports. Power supply voltage is 65-90vdc. It is suitable for drive the 18 "-21" Speaker, with power as explained above.

This PCB Layout is also equipped with over curret protect (protect if out short or load exceeds max amp power)

PCB Layout Class-D D2K FB (Full Bridge) 2000W

Download PCB Layout PDF

2Way Passive Crossover Mid - Hi

This time I will share the passive crossover (Xover) circuit used for the 2 Way system. Passive Xover is more complicated than an active crossover. And using active Xover is much easier because:

  • It's hard to keep the phase angle. Or almost impossible. Passive Xover there is a phase shift. So in one sound rig, you should only use one type of Xover.
  • It's very difficult to make a Xover flat. So high skills are needed
  • Passive Crossover (Xove)r has many losses or losses due to series filters and bypasses. More than 30% of the power that goes into the speaker is bypassed
  • Because Passive Xover has many losses or losses due to series filters and bypasses, if the component is not good or the design is not patent, the component can overheat
  • Playing with active Xover is better because;1. No angle shift 2. There are no bypass losses
Below for the schematic 2Way Passive Crossover Mid - Hi:
2Way Passive Crossover Mid - Hi

Wednesday, November 28, 2018

PCB Layout Power Amplifier OCL140W

This the PCB Layout Power Amplifier OCL 140W. The power amplifier required symmetrical power supply with 25 - 45V DC 5A Current. See thr PCB Layout power amplifier OCL 140W Below:

PCB Layout Amplifier OCL 140W

PCB Layout OCL 140W
PCB Dimension 45mm x 70mm