Audio sounds

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- 30th March 2009, 14:13
Christopher4187

Audio sounds

Hi,

I'm making a toy and I need at least four different sounds. I looked at a piezo buzzer and they are expensive to put four on the board. I'm not using a PIC so I don't have the option of doing software routines. My thought at this point is to use a 555 with one piezo buzzer to try and make different sounds by adjusting the timing. Is this a good idea? Is there a chip out there that can help me do what I need to do? Maybe get an inexpensive PIC with PWM or DTMF tones? Any advice is greatly appreciated.

Thanks,

Chris
- 30th March 2009, 14:54
Acetronics2

Hi,

Have a look to HT 2810/2813/2830/2844 or ISD 14xx or 25xx chips ...

Alain
- 1st April 2009, 13:48
Christopher4187

Ok, so I got an op-amp and tried it. It pretty much worked like crap. I re-checked all of my connections and they looked good but still nothing.

So, I took out a 16F676 and when I use the "freqout" command along with a 20MhZ resonator, it worked really good. Then I fed the output to a PNP transistor and it was even louder so I think I will most likely use that approach.

Here is my dilemma. I took a speaker from one of those Motorola talkabout FRS radios. I want to buy about 10 of those speakers but there are no markings on it. Does anyone know what kind of speaker I should look for? 4ohm, 8ohm....frequency range....power rating?

Thanks in advance for the help.

Chris
- 1st April 2009, 16:13
mister_e

I don't think those Motorola ones are fancy, so probably anything in a local overstock place would do.
- 1st April 2009, 17:59
Normnet

If you are using a PIC see PIC iPod wav player

CD mono quality of wav files for voice or sound.
May be more than you require though.

Other compiler.

Norm
- 1st April 2009, 21:30
Christopher4187

Quote:

Originally Posted by Normnet

May be more than you require though.
Norm

Yeah, it's much more then I need and way above my level of expertise. However, I may be able to use that audio chip and I will check it out to see how it works. Also, your speaker (LS1), do you have a part number for that?

Thanks,

Chris
- 1st April 2009, 23:48
Normnet

Quote:

Originally Posted by Christopher4187

I may be able to use that audio chip and I will check it out to see how it works.

I think mister_e also once recommended an audio amp but I didn't catch it at the time.
Defiantly better than the LM386.

Quote:

Originally Posted by Christopher4187

speaker (LS1), do you have a part number for that?

No part number.
Mainly separate front from back with either an enclosure or a front panel.
I used car speakers for quality but any speaker will output sound.

Someday I will post a basic version of PIC iPod wav player.

Norm