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Type: Posts; User: bmillier

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    Well, depending upon use, a piezo can put out a...

    Well, depending upon use, a piezo can put out a pretty big signal, so even if you load it down with the 29k input impedance of the SGTL5000, its not surprising you could still have enough signal to...
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    @alonper. Following is a mod you can make to your...

    @alonper. Following is a mod you can make to your buffer/filter. I am just showing the part of the input stage that is DIFFERENT.
    9971

    This will give you a gain of between 1 and 6, depending upon...
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    @alonper: I am sorry- I had a few things wrong:...

    @alonper: I am sorry- I had a few things wrong:
    1) The ICL7660 has an internal Oscillator of 10K not 100K.It was another charge pump chip I have used that had the 100K rate. Still, I have used...
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    @ oddson- Yeh, I couldn't come up with a good...

    @ oddson- Yeh, I couldn't come up with a good overdrive algorithm on my own, at least not quickly. But I did write a vibrato routine, implemented tremolo easily enough, have a decent reverb using an...
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    @ alonper. I doubt that the ICL7660would produce...

    @ alonper. I doubt that the ICL7660would produce ripple that would be a problem for normal audio- its internal oscillator is >100 KHz I believe (would vary a bit from manufacturer to another) so its...
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    The ICL7660CPAZ will be fine, assuming you are...

    The ICL7660CPAZ will be fine, assuming you are feeding it with 5V. The A and S versions work over a much wider supply voltage of 1.2- 12 volts, which you don't need. They're all about the same price...
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    Why do you need more than 45 ma for the PGA2311? ...

    Why do you need more than 45 ma for the PGA2311? It only draw a 10 ma quiescent, and unless you were using a very low load resistance on its output, it won't draw a whole lot more in operation....
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    Check out the ICL7660 charge pump IC. It gives...

    Check out the ICL7660 charge pump IC. It gives -5V at up to 45 mA, from a +5V supply. It needs only 2 capacitors in addition to the IC itself. You can get it in SOIC or DIP, 8 pin packages. Digikey...
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