Class D Amp with LM566, LM393 and 2XIRF530

[wiljj78]

Pcb,only 1 chanell the other is so bad its not even worth trying,is this good for etching,looks pretty good for my first pcb ever,


Do you think its good enough or should i get another one,for the other chanell im obviosely goinf to get a new one

I suggest you to follow this method https://www.youtube.com/watch?v=tWnfnt2rNO0.
Also in youtube you can find many toner transfer method in order to improve your etching process.

All the best,

 

[joexswj]

Mr.Mile
can i use 74LS00 instead 74HC00 without any changes of schema?

 

[norazmi]

H! Azmi,
Good to see you back.. The Fets will be mounted under the board, I have here an old flat heatsink used for TO-3 outputs. I'll have to cut it though coz it's huge....

Regards!

hi Abetir,

Thanks, i`ll give a try with Apex class D, its worth of trying, simu tell its good to go, will use irfp264 for it with +- 70 vdc, will test with linear and smps psu

Long time im not doing DIY lol, because i have too many amps which idk what to do with it, some i just give to friend for home use. But seems i still have alots of electronic parts, so when im free i will do it again lol, i`ll post picture irs900 and apex200D. i already done 3 pcs of irs900D its so powerfull when bridge it even at +- 47 vdc.

 

[PetruV]

this is more like it,another copy shop,with different machine,non glossy paper.Plus this is cheaper,better,closer to me,i can easyly acces it when going outside since i have to walk just 200m
im starting etching after you tell me its ok
keep in mind im cleaning as i go

 

[norazmi]

Petruv, make sure you draw with good pen or pcb pen. After etch do test with multimeter if any trace touch with other trace, check carefully. Im understand you`re so excited to make an amp but its good to give it a try . Next time if you draw the trace with marker or etc, draw it carefully

 

[PetruV]

I suggest you to follow this method https://www.youtube.com/watch?v=tWnfnt2rNO0.
Also in youtube you can find many toner transfer method in order to improve your etching process.

All the best,

That is way too complicated plus i cant find boards like that

 

[PetruV]

Petruv, make sure you draw with good pen or pcb pen. After etch do test with multimeter if any trace touch with other trace, check carefully. Im understand you`re so excited to make an amp but its good to give it a try . Next time if you draw the trace with marker or etc, draw it carefully

i did it with a maker since they were some thinned out ones

 

[Tekko]

Or you can place an order with itead studio and get ten boards for 28 us dollars shipped, though this requires having access to the PCB gerber files, which i'd guess is a well regarded secret locked away at apex's PC. Assuming Apex dident just draw his pcb's with a picture editing program such as photoshop, ms paint or similar.

and no norazmi, you cannot use a LS series ic, the circuit assumes and requires a HC series ic which is a mosfet based ic wheres the LS series is bipolar transistor based, the LS series is also much slower.

 

[norazmi]

Or you can place an order with itead studio and get ten boards for 28 us dollars shipped, though this requires having access to the PCB gerber files, which i'd guess is a well regarded secret locked away at apex's PC. Assuming Apex dident just draw his pcb's with a picture editing program such as photoshop, ms paint or similar.

and no norazmi, you cannot use a LS series ic, the circuit assumes and requires a HC series ic which is a mosfet based ic wheres the LS series is bipolar transistor based, the LS series is also much slower.

its not me tekko, it was joexswj , maybe hes forgot to read the datasheet...

 

[PetruV]

What power output i get at+- 90v rail voltage,i need to choose a psu

 

[Tekko]

As maximum possible voltage swing is about 10 volts short of the rail voltages, i'd say absolute maximum 1600 watts PEAK into 4 ohms, thats about 800 watts RMS MAX.

 

[de Ocampo]

this is more like it,another copy shop,with different machine,non glossy paper.Plus this is cheaper,better,closer to me,i can easyly acces it when going outside since i have to walk just 200m
im starting etching after you tell me its ok
keep in mind im cleaning as i go

PetruV,

Are you doing laser toner transfer method? I guess it should be a good idea to practice first on a smaller design (lay-out). In my place there are two methods of toner transfer, using flat iron and the other using lacquer/acrylic thinner. I'm used to the ironing method and the technique on this one in order to come-up with very good results, is on the flat iron thermal setting and on the glossy paper being used. You'll have to practice on smaller design first otherwise you will only be wasting your precious PCBs.

Goodluck!

 

[PetruV]

As maximum possible voltage swing is about 10 volts short of the rail voltages, i'd say absolute maximum 1600 watts PEAK into 4 ohms, thats about 800 watts RMS MAX.

Thats quite more than enough,so i will drop the voltage to 75v yelding me 1000 peak 500rms

 

[PetruV]

im etching just one channel since the others copper clad broke

 

[PetruV]

etched and holes drilled,some of the holes are somewaht offset since my drilling motor has and badly centered drill,i dont know how to center it since its soldered in place

 

[norazmi]

Petruv,
That was bad driller motor, get a good one

 

[Tekko]

That looks like krap!! You should have used a permanent marker pen to fill in where the toner dident cover, now you have patches of copper missing and traces looking like they'r mostly gone.

 

[PetruV]

Petruv,
That was bad driller motor, get a good one

It goe trough no problem,its just the centering

 

[PetruV]

That looks like krap!! You should have used a permanent marker pen to fill in where the toner dident cover, now you have patches of copper missing and traces looking like they'r mostly gone.

the acid went throug the toner and marke in some places

 

[PetruV]

We are getting somewhere,not to far yet since i ran out of parts since i didnt buy anithing yet for this project,so have a look,
BTW what voltage do the caps have to be,i have a lot of 47uf caps but i dont know the voltage needed