Hi guys,
I'm going to be toying around with audio filters and wondered if there are standard capacitors that I should buy. Either type or value, or both. Right now I have a microcontroller 10-bit DAC* feeding an on-chip op-amp and going to a small speaker. I have the OPA set up to buffer the DAC, but I recognize that I should be making it as an active LPF. This isn't going to be high-end stuff, but about me learning about filters. Based on some online LPF calculators the capacitor component values are within the range of several capacitor types: polyester film, polyester Mylar, monolithic ceramic, and regular ceramic. Is there a preferred type among those?
Are there beginner-friendly books I can get? I have "The Active Filter Handbook" by Tedeschi somewhere in a box of unread books if I can find it.
Also, is there an objective means a hobbyist can compare setups? I have a Rigol DS1052E that has FFT, but other than printing out the FFT plots and comparing ones with drastic differences I wouldn't know which setup is better/best.
Any input?
Thanks,
Mike
* And I'll probably experiment with PWM too.
I'm going to be toying around with audio filters and wondered if there are standard capacitors that I should buy. Either type or value, or both. Right now I have a microcontroller 10-bit DAC* feeding an on-chip op-amp and going to a small speaker. I have the OPA set up to buffer the DAC, but I recognize that I should be making it as an active LPF. This isn't going to be high-end stuff, but about me learning about filters. Based on some online LPF calculators the capacitor component values are within the range of several capacitor types: polyester film, polyester Mylar, monolithic ceramic, and regular ceramic. Is there a preferred type among those?
Are there beginner-friendly books I can get? I have "The Active Filter Handbook" by Tedeschi somewhere in a box of unread books if I can find it.
Also, is there an objective means a hobbyist can compare setups? I have a Rigol DS1052E that has FFT, but other than printing out the FFT plots and comparing ones with drastic differences I wouldn't know which setup is better/best.
Any input?
Thanks,
Mike
* And I'll probably experiment with PWM too.