Raven Luni
- Oct 15, 2011
- 798
- Joined
- Oct 15, 2011
- Messages
- 798
New design, not going to do a full project log for this one - just wanted some quick feedback on this new design. For the unfamiliar, the basic idea of this circuit is to take the vocalisations of bats (usually around 40-60 kHz for the more common species) and produce an audible representation by feeding the zero crossings to a counter / divider.
I'm hoping to keep background noise to a minimum by with the following measures:
- Pre-amp gain control
- Adjustable hysteresis in the compatator
- High pass filter (second order, calculated for around 20 kHz with a gain of 5)
Unfortunately I have no way to test these except in the field (I've had some success with earlier versions but the designs were still pretty crappy, had bad calculations etc).
I'm also not sure about the output volume control but couldnt think of any other way to do that.
I'm hoping to keep background noise to a minimum by with the following measures:
- Pre-amp gain control
- Adjustable hysteresis in the compatator
- High pass filter (second order, calculated for around 20 kHz with a gain of 5)
Unfortunately I have no way to test these except in the field (I've had some success with earlier versions but the designs were still pretty crappy, had bad calculations etc).
I'm also not sure about the output volume control but couldnt think of any other way to do that.