lilimike
Member
Hi,
I would like to get a Pro's opinion on this circuit. It is the receiver part of an ultrasonic distance measurement device. The Tx is performed straight from 2 PIC pins (inverted) with a burst of 40KHz duty cycle of 50% for a delay of 150mS.
I am using 400ST160 and 400SR160 transducers. I have tried to improve the gain but it doesn't seam to make a difference. Maybe I need to work on the Tx part by using a MAX232 but I would like to make this my last option. If I could get some good advice on the receiver by adding or removing parts or changing values that would be great help.
Thanks
Mike
I would like to get a Pro's opinion on this circuit. It is the receiver part of an ultrasonic distance measurement device. The Tx is performed straight from 2 PIC pins (inverted) with a burst of 40KHz duty cycle of 50% for a delay of 150mS.
I am using 400ST160 and 400SR160 transducers. I have tried to improve the gain but it doesn't seam to make a difference. Maybe I need to work on the Tx part by using a MAX232 but I would like to make this my last option. If I could get some good advice on the receiver by adding or removing parts or changing values that would be great help.
Thanks
Mike