Tuesday, September 07, 2021

How to make a TDA 2030 BTL power amplifier

How to make a TDA 2030 BTL power amplifier, you can just replace it with another type of IC or the equation of this TDA 2030 type IC. for example, we use the TDA 2050 IC which is very easy to get on the market if the type of ic we are looking for is rather difficult to get in the market. first, you can make the PCB first, for the guide you can use the layout as shown in the following picture.

How to make a TDA 2030 BTL power amplifier

For the Masking Component section Power Amplifier TDA2030 BTL, you can use the image pattern as follows
PCB Layout Power Amplifier TDA2030 BTL

For the PCB track section BTL Power Amplifier TDA2030 you can make it as in the following example image.
Layout PCB Power Amplifier TDA2030

Monday, September 06, 2021

PCB Layout Power Amplifier NAMEC with DCO set

 For those of you who are curious or want to try to make this PCB Layout Namec Power with DCO Set, because with the availability of the DCO function it will make it easier to set the DCO output by turning the Variable resistor in this DCO section while taking measurements, and looking for the most accurate value measuring point. low, if possible 0.0mV. Here's the PCB Layout Namec with DCO:

PCB Layout Power Amplifier NAMEC with DCO set
For the copper line, you can make it according to the layout as follows.
PCB Layout Power Amplifier NAMEC with DCO set circuit

For Arrangement of components on the top of the PCB
PCB Layout Power Amplifier NAMEC with DCO set

DC Step Up 12V to 310V DC for LED Lighting Lamps

Hello guys, in this post I will build a step up dc circuit or dc to dc, from a 12VDC source voltage or from a 12V battery which I will raise to a high voltage of 310V -370VDC, what is the output voltage for? Later I will use it to turn on 220V lamps, especially LED lamps or incandescent lamps, and the lamp power that can be used starts from 3-200W, actually this is my project to make solar panel lamps or solar lamps, with a sloping budget, but it can produce maximum light.

Okay, here's a circuit schematic for DC to DC,

12V to 310V Inverter Converter
Download PDF 

this circuit can also be used for amplifiers that require an asymmetrical voltage,  this circuit regulated and can adjust the output voltage. 

Because I specialize in this circuit for the use of solar lamps, I add a feature for under-voltage protection, if the voltage is below 10V the circuit will die, so the battery is not easily damaged. This feature can also be adjusted on the Trimpot R35. then there is a light sensor, using LDR, this feature is to turn off the Step-up circuit during the day, and at night it is only active to turn on the lights. the sensitivity setting is on R42. I actually took this light sensor feature from the solar charge panel, so when the solar panel gets light, the charging light will turn off and the relay will connect the battery to charging, and disconnect the battery from the DC to DC circuit. and the LDR sensor feature can be used if the battery is not charging using a solar panel.

To make it easier to assemble, I made a PCB layout with PCB dimensions of 9.8x7cm 2 layers, you can download this PCB layout from the link in the description. Because this PCB is dual-layer, I recommend printing the PCB on JLCPCB.com, because the price is cheap with good quality. for how to print PCB on JLCPB.

See Video Assemblinghttps://youtu.be/wGGUCgfVR9A

PCB inverter 12V
PCB Updated


Schematic DC Step Up 12V to 310V DC for LED Lighting Lamps PDF

Gerber files DC Step Up 12V to 310V DC for LED Lighting Lamps

Monday, August 16, 2021

PCB Layout TD EEEngine G77 PSU 160V DC CT

High Power Amplifier Class  TD EEEngine , EEEngine G77 high voltage power supply upto 180VDC CT power output up to 2500W RMS. 

PCB Layout TD EEEngine G77  PSU 160V DC CT

 Here's the PCB layout that I designed, this PCB can be downloaded at the link in the description. the holes for the tr final buffer and MOSFET I made are similar to castellated. But here I add these small through holes to make it stronger and when I remove the final tr until the copper layer is peeled off, these small through-holes are used as a backup for the connection between the top and bottom layers. so we don't have to bother soldering the transistor from the bottom.

For this 2.2uH air-core inductor using a 1.5mm wire wrapped around 24 loops of 2 loops, with an inner diameter of 8mm, I wrapped this using a drill bit with a diameter of 8mm, the method of winding it was 2 loops, the direction of rotation of the windings is free, but if possible, the direction of the winding is the same. between the inductors . For the buck step-down inductor, the core I use is the MS130125-2 core, because the place is too tight, I use 2 double 1mm wires, and it is wrapped 28 times, the direction of the winding between the inductors may be different, but it's better to be in the same direction.

For the Zobel RL, the inductor I use is a 1.5mm wire wrapped around 14 turns, and the resistor I use is R 10ohm 5 Watt.

For this servo bias tr, I use a jumper cable to attach it to the final tr or to the heatsink. A transistor can be replaced BD139 or MJE340.

Final transistor can use MJL21193 / MJL21194


PCB Layout Gerber Files EEEngine G77 FIXED 100%

Sunday, August 01, 2021

Power Amplifier Class AB G77

The following is a series of Power Amplifier class Ab G77 by Kartino S., for the embedded features there is an input balance that can be changed directly to unbalance with this additional jumper, then there is a led indicator, speaker delay. DC Protection and input limiter features, this limiter can also be bypassed, by removing this jumper. there are features that adjust DCO and also adjust the bias.

For the final transistor using 8 sets of final transistors. .can use Toshiba, NJW, sanken allegro, etc. can be adjusted to the power supply voltage.

And the following is for the PCB layout design, the dimensions of this PCB are 27.5mm x 7 cm, for the heatsink or cooler later, you can use the 2U size heatsink,  with a length of 30cm.

And I share this PCB for free, the download link can be downloaded at the end of the post.

Power Supply Max 100VDC CT Recommended 90VDC CT. Minimum 10A.

Build and tested amplifier video:Power Amplifier Class-AB G77


Gerber Files: PCB Layout Class-AB G77  Buy PCB at JLCPCB.com

Sunday, July 18, 2021

DIY Super Powerful Monoblock Car Amplifier Subwoofer - Class-D

DIY Monoblock Car Amplifier Subwoofer - Class-D
Hello, in this post, I will make a monoblock amplifier for subwoofer speakers that use a 12V power supply or battery, which I will later install in the car.

Class-D Subwoofer Amplifier

The following is a schematic of the amplifier block. there are several parts, namely the section for the dc to dc converter, from 12V it is increased to 45-75VDC CT voltage for the main supply of the amplifier, for the protection supply and 12V bias I also made from the secondary output of the transformer, so that it is isolated from the primary power supply voltage for supply ic opamp I use R Shunt + zener which is taken from the main supply. oh yes, for the amplifier, I use a class-d Halfbridge Dual feedback amplifier designed by Mr. Kartino S. For the totem, I use 2 TC4420, and use 4 mosfet. The mosfet that I will use later is 90n20, and I will use the amplifier later to handle speakers with an impedance of 1 ohm and even this amplifier can also be used for 1 ohm and below. for the subwoofer filter, I use the same as the one posted in the tda7294 subwoofer amplifier. For protection, I added a DC protector, an Over-current protector.

12V Class-D Subwoofer Amplifier

The following is the PCB layout that I have designed, the PCB size is 33.7x14.5cm, I made the size to fit the heatsink or cooler from the car amplifier that I have so that it looks like a car amplifier in general. I made a dual-layer PCB design, I will share the layout for free, you can click the link at end of the post. For dual layer PCB printing, I recommend JLCPCB because the price is sufficient and the work is fast, less than 2 weeks the PCB from JLCPCB has arrived at home. 

My primary elco uses a capacity of 6800uf voltage 25V and secondary Elco 1200uf 80V. The inductor for my filter uses an inductor rated at 8uH. I made 2 versions of the PWM, namely the TC4427 totem and the a1015 transistor. Friends, you can also download the PCB layout at the same link. PWM uses the TL494 IC and without using a pin header so it is directly soldered to the mainboard amplifier PCB. The trimpot on this PWM serves to regulate the secondary voltage output.

Next for the converter transformer, I use a green toroid with a diameter of 6.5cm. For the primary winding, I use 1.5mm wire for as many as 6 copies with a total of 6 turns. for the second part, I used 7 duplicate 1mm wires with 27 turns. and for the extra, I use a 1.5mm wire wrapped around as much as 10 turns.

For the fuse, you can adjust the capacity of the battery. my secondary diode uses a mur1560 diode, and 8 MOSFET transistors for the converter I use fdp054n10.

Next we test first whether the converter is working or not, install the fuse on the secondary output. then input the black 12V supply for the red min for the + and this small cable for the brake or remote voltage, for testing it can be jumped directly with the + voltage.

Then turn on the amplifier, if the Over Current led is active, set the trimpot to Over current, turn it to the right so it's not too sensitive.

 If the OCP is off then the protect led will light up for a while, and a small relay will activate. the sign is that the converter is working, and the red led near the speaker relay will also light up briefly and turn off, the led is for the protect indicator on the speaker. protect will work when the speaker is on or delayed, and if the speaker output is more than 3V DCO.

Next, we check the voltage at several points before installing the components, this is the op-amp supply voltage on the subwoofer filter, which is + - 30V and 15V to ground. if it does not come out can be checked on the Zener diode under the R shunt.

then this is the main supply voltage around 56V DC to Ground. This voltage can be set on the trimpot on the PWM board as I described earlier.

And this is the bias voltage and supply protector around 12V DC. if it does not come out the possibility of IC 7812 is damaged, for the TL071 opamp supply voltage on the amplifier section, the voltage reads 25V DC + - and to the ground is around 12VDC. if it doesn't come out it's possible that the Zener or rshunt is damaged. If the measurement point has been met, then we will install the IC before installing the CLass-D mosfet we check first whether the PWM amplifier is working or not, we can check using an oscilloscope, attach the probe to the low side MOSFET gate, and ground to the ground amplifier. Inject the input with the audio generator, then the gate will output a PWM signal with a freq according to the input freq. 

the amplifier driver is already working, then we turn it off first and install the MOSFET. MOSFET uses 4x 90N20 MOSFET.

 then we test again, attach the oscilloscope probe to the prefilter, and ground to the ground amplifier After that, turn it on again, now the PWM has come out, I set the freq at 160kHz, to set it, I can change the value of the resistor with the set freq label. If we hold the input, the duty will widen, this is a sign that the amplifier is working.

For more details check this youtube video: https://youtu.be/SbHpzabJLdM


Full schematic and PCB Layout Gerbe Files  Monoblock Subwoofer Car Amplifier Mainboard + PWM board

Friday, June 11, 2021

Subwoofer Controller Low Pass Filter

Subwoofer controller preamplifier, this circuit functions to filter low tones specifically for power amplifier use with subwoofer speakers, works well which is equipped with a 30Hz-500Hz frequency setting feature, Subsonic Filter feature to remove frequencies below 20Hz, Bass-Booster feature, to increase bass gain. And also volume settings.

Below the Subwoofer Controller Circuit Diagram:

Subwoofer Controller Low Pass Filter
In the circuit above there are 4 pieces of IC Dual Op Amp, IC U10 serves as an input buffer that can be Stereo or mono by entering both inputs with audio sources. So if this subwoofer controller circuit is combined with other tone controls, it will not affect the other preamp circuits.
IC U1 for low-tone frequency filters that can be adjusted in frequency on the potentiometer R45/R10, the R is the same only differs in the PCB design so that it can use 2 types of potentiometers. But I recommend using 20K ohm size.

IC U2 as a Subsonic filter, which can be activated or bypassed on the SUBSONIC switch.
IC U3 as a bass booster to add gain that can be activated or bypassed on the BOOST switch. gain can be set at R55, the greater the value, the greater the gain, and vice versa.

IC can use JRC4558, NE5532, TL072, MC33078, etc.

Here's the PCB Layout for the schematic above, it's working fine.

PCB Layout Subwoofer Controller Low Pass Filter
Tested Video: https://www.youtube.com/watch?v=EHgSCcvw8Uw

PCB Layout can be downloaded in PDF/Gerber file format: