My class D amp

[akraj]

Manoj Aud with On board BIAS and protection with uC

Hi Manoj:

I am trying to make a complete board where BIAS and all kind of protection will be present.

Please have a look and modification instruction is welcome.\

Thanks
Raj

 

[manojtm]

Hi ALL,

Very simple limiter for AUD600 using apex power+signal+clip circuit with LDR & LED
It is very effective

Regards
MANOJ

 

[manojtm]

Hi ALL

This the attachment 🙂🙂🙂

Regards
MANOJ

 

[stewin]

Hi Manoj:

I am trying to make a complete board where BIAS and all kind of protection will be present.

Please have a look and modification instruction is welcome.\

Thanks
Raj

thanks but akraj pls post pcb files. have you tested it with high voltage?

 

[akraj]

Amp circuit tested by many ppl and protection schematic has been simulated in proteous. Hope they will work. Still some modification needed, after test I will share.

 

[sandeep kayarkar]

Hi Manoj, can i use this core for your AUD600 amp? its from old TV smps.

 

[manojtm]

Hi Sandeep,

yes, use gap 1mm all or 1.5mm center

Regards
MANOJ

 

[sandeep kayarkar]

how can i get 33uh? pls tell me swg and turns........................

 

[stewin]

any news on aud600 ver 3.0

 

[manojtm]

Hi Stewin,

There is no secret in AUD600 new versions.It is a sigma-delta design and i learn some lesson that i will share

TL071 using first Oscillator , this not a PWM, it acts only a osc. its freq. determined by two capacitor and one resistor. any of this value change frequency will be changed.
so c1=c2 constant and change the value of resistor not 0 ohm min 150 ohm to 2000 ohm. this will change the freq.
value increase= increase freq.
value decrease= decrease freq.
(ex. if the R= 1K and c=c1&c2=1000pf now freq. is @900KHz)
when the FB connected to the input of TL071 it will down the freq. to desired one (filter coil,FB resistor,capacitor and supply voltage will change the freq.)and now it will act PWM when audio signal input present.

so increasing the first osc. will give good sound quality.and the disadvantage is the stability of the amp is decreased, means any issue cause high freq. noise and it will damage IR2110,7404 and relay or SP
(it will go up to freq.=@1.6MHz.)

for stable use 500 ohm,470 ohm or 330 ohm resistor and change the FB resistor,coil and capacitor.
this will reduce the sound quality little but your amp is stable without any problem.

Regards
MANOJ

 

[stewin]

hi manoj . i was refering to the pcb version of your amp which has the relay and protect circuit on one board . pls post your schematic so i can try to design my own pcb .

by the way your amp is excellent it rocks . i tested it yesterday the protection is o.k
and sound quality and power are superb .will post photos later . pls post pcb of the version of everything on one board. 🙂

 

[aman khalsa]

drum core

hello sir can i use this core of LPF ??? thank u

 

[aman khalsa]

hello sir can i use this core of LPF ??? thank u

Can I use this core for aud600 ..????

 

[andrewlebon]

Hi Manoj
greetings can 2n4861 be substituted by 2n7000 in your simple NE5532 LIMITER
warm regards
andrew lebon

 

[manojtm]

Hi All

Simple limiter using LDR+LED(SLA32SR3)🙂🙂🙂

Regards
MANOJ

 

[akraj]

Hi All

Simple limiter using LDR+LED(SLA32SR3)🙂🙂🙂

Regards
MANOJ

Nice to see you back again.

 

[manojtm]

Nice to see you back again.

Hi Raj

Thank you

attaching limiter wiring diagram

Regards
MANOJ

 

[manojtm]

Hi All

new Coil received for testing 450KHz switching AUD600 class D amp🙂🙂🙂🙂🙂

Regards
MANOJ

 

[stewin]

hi .nice coils how much do they cost?

also manoj pls post aud600 schema . i want to redraw pcb and put relay and protect board together with the amplifier in one board.

 

[akraj]

hi .nice coils how much do they cost?

also manoj pls post aud600 schema . i want to redraw pcb and put relay and protect board together with the amplifier in one board.

Hi Stewin:

Have you seen my one? Any improvement needed?

Thanks
Raj