100W Ultimate Fidelity Amplifier

[I love the sound]

Replace 1k8 with 470R for more gain...

Thanks Mile!

 

[DevilDrums]

Thanks for not answering. he picked up the capacitors

 

[rehman]

hello everyone, i have a problem, i am using a Bluetooth module in amplifier. when i power it with linear regulator it gives a continuous white hum and when it is powered with 5v adapter it works accurately but i don't want to use an adapter. can any one suggest me a proper sollution????????????

 

[donpetru]

hello everyone, i have a problem, i am using a Bluetooth module in amplifier. when i power it with linear regulator it gives a continuous white hum and when it is powered with 5v adapter it works accurately but i don't want to use an adapter. can any one suggest me a proper sollution????????????

You will have to apply another wiring amplifier. Can you show me the amplifier schematic used ?

 

[avtech]

Thanks for not answering. he picked up the capacitors

Your google translate question made no sense.

 

[avtech]

when i power it with linear regulator it gives a continuous white hum

Show us a diagram of your setup - I assume the linear regulator contains filtering?

Sounds like a ground loop issue - does the 5V adapter have an earth pin on the plug?

 

[rehman]

this is the schematic of supply to power up a pre amplifier the section above relay is latching circuit when preamp is switched on an led indicates the power but preamp stays at standby until a push button is pressed. the problem is that if i use a 5v adapter, mp3 module will not be controlled by this circuit. 5v regulator don't work so well.

 

[donpetru]

this is the schematic of supply to power up a pre amplifier the section above relay is latching circuit when preamp is switched on an led indicates the power but preamp stays at standby until a push button is pressed. the problem is that if i use a 5v adapter, mp3 module will not be controlled by this circuit. 5v regulator don't work so well.

Attach the schematic amplifier !!!

 

[donpetru]

this is the schematic of supply to power up a pre amplifier the section above relay is latching circuit when preamp is switched on an led indicates the power but preamp stays at standby until a push button is pressed. the problem is that if i use a 5v adapter, mp3 module will not be controlled by this circuit. 5v regulator don't work so well.

I have drawn the correct wiring method of the amplifier in the picture below. In your case, if you implement SM Connector, do not use a jumper
or don't use resistor of 10 Ohm.

 

[Astaro]

apexaudio,Tell me, please, what functions does the capacitor C13? Is it possible to simply connect the earth with a jumper? or do one solid?
(Highlighted it with red arrows in the screenshot)

 

[rehman]

I have drawn the correct wiring method of the amplifier in the picture below. In your case, if you implement SM Connector, do not use a jumper
or don't use resistor of 10 Ohm.

i have used the same wiring but the problem is with mp3 module when it is driven with 5v regulator it gives noise even with filter. i tried to use 5v bulk converter but still the same issue. i have atteched the image of mp3 module and bulk converter i used.

https://ae01.alicdn.com/kf/HTB1nxbU...-Decoder-Board-Panel-Audio-Module-Support.jpg

https://www.elprocus.com/wp-content/uploads/Buck-Converter.jpg

 

[Sunny22g]

Hello u using same transformer for amp.

 

[Sunny22g]

Mean same supply u using amp .and 7805 . Do not use .use seperate transformer or psu

 

[Sunny22g]

When I use same supply with7805 Bluetooth give noise. After I use seperate mobile adaptor .then dead silent

 

[rehman]

Mean same supply u using amp .and 7805 . Do not use .use seperate transformer or psu

no this only drives the mp3 module in preamplifier. i have attached the supply schematic in my previous post.

 

[rehman]

When I use same supply with7805 Bluetooth give noise. After I use seperate mobile adaptor .then dead silent

yes even if i use a regulator with seperate adapter, mp3 gives noise

 

[Sunny22g]

Are u using sheild wire for input .

 

[rehman]

Are u using sheild wire for input .

yes, the issue is that when mp3 module is driven through any king of regulator it gives noise whether there is any input signal or not, in line in mode or bluetooth mode. the only solution is to use a seperate 5v adapter( any mobile phone charger). in this case i will have to design an extra circuit with an extra transformer to switch on the whole thing

 

[Sunny22g]

Pls check u amplifier is ok . connect with pc or mobile.then volume low to High. Use 2core sheild wire for input.use seperate supply for Bluetooth..this is 3 step.

 

[rehman]

Pls check u amplifier is ok . connect with pc or mobile.then volume low to High. Use 2core sheild wire for input.use seperate supply for Bluetooth..this is 3 step.

dude i have tried all.