music amplifier

[steve]

I need to amplify the sound from a 9 volt dc audible probe circuit.

The probe provides a very low musical melody sound that cannot be
heard.

However, another audible probe circuit that only beeps, is audible.

At the musical probe output, the voltage is very low, around micro
volts.

The audible probe outputs slightly higher voltage.


Steve

 

On Oct 30, 12:06 am, steve <kvst...@gmail.com> wrote:

I need to amplify the sound from a 9 volt dc audible probe circuit.

The probe provides a very low musical melody sound that cannot be
heard.

However, another audible probe circuit that only beeps, is audible.

At the musical probe output, the voltage is very low, around micro
volts.

The audible probe outputs slightly higher voltage.

Steve

Try this one.

http://www.tricountyi.net/~randerse/amp.htm

Michael

 

[ehsjr]

steve wrote:

I need to amplify the sound from a 9 volt dc audible probe circuit.

The probe provides a very low musical melody sound that cannot be
heard.

However, another audible probe circuit that only beeps, is audible.

At the musical probe output, the voltage is very low, around micro
volts.

The audible probe outputs slightly higher voltage.


Steve

Simplest might be an LM386 amplifier IC.
http://cache.national.com/ds/LM/LM386.pdf

2 or 3 caps and a pot are the only other
parts you need, besides a speaker.

Ed

 

[ian field]

"ehsjr" <ehsjr@NOSPAMverizon.net> wrote in message
news:whpOk.1415$Jv2.128@nwrddc01.gnilink.net...

steve wrote:
I need to amplify the sound from a 9 volt dc audible probe circuit.

The probe provides a very low musical melody sound that cannot be
heard.

However, another audible probe circuit that only beeps, is audible.

At the musical probe output, the voltage is very low, around micro
volts.

The audible probe outputs slightly higher voltage.


Steve

Simplest might be an LM386 amplifier IC.
http://cache.national.com/ds/LM/LM386.pdf

2 or 3 caps and a pot are the only other
parts you need, besides a speaker.

Ed

Simpler still is the TDA7052, its a BTL amp in the same DIL-8 package - the
one with the "A" suffix has DC volume control.

 

[steve]

On Oct 31, 3:22 am, "ian field" <gangprobing.al...@ntlworld.com>
wrote:

"ehsjr" <eh...@NOSPAMverizon.net> wrote in message

news:whpOk.1415$Jv2.128@nwrddc01.gnilink.net...





steve wrote:
I need to amplify the sound from a 9 volt dc audible probe circuit.

The probe provides a very low musical melody sound that cannot be
heard.

However, another audible probe circuit that only beeps, is audible.

At the musical probe output, the voltage is very low, around micro
volts.

The audible probe outputs slightly higher voltage.

Steve

Simplest might be an LM386 amplifier IC.
http://cache.national.com/ds/LM/LM386.pdf

2 or 3 caps and a pot are the only other
parts you need, besides a speaker.

Ed

Simpler still is the TDA7052, its a BTL amp in the same DIL-8 package - the
one with the "A" suffix has DC volume control.- Hide quoted text -

- Show quoted text -

Thanks to everyone for their views.

Been bsuy lately .. will try and inform soon.

Steve.