Hi,
I'm currently making a distance sensor for a drone with some ultrassonic transducers ( one transmitter and one reciever ) but I have only the room for one of these .
I wanted to use a analog switcher but I couldn't find the right one.
What other device could I use ?
Thxs.
Nico
You don't need a switch - you are trying to do exactly what car reversing sensors do - so there is a load of stuff on the web.
I've done some of this work - here's a bit of circuit that I've used:
The transducer goes between SE1 and ground, pulse D1 to drive the transducer, take the signal at PR1 to S10 on the filter. D1 and R19 protect Q1 from the huge voltage at SE1 when the transducer is driven. Most cheapo reversing systems work like this, although they often use a dedicated chip rather than discrete components.
This is the bandpass filter and drives a 12 bit ADC on a micro.
There are single chips that will do this for you.
You can buy transducers, transformers etc from Farnell (and lots of other places too).
MK
You don't need a switch - you are trying to do exactly what car reversing sensors do - so there is a load of stuff on the web.
I've done some of this work - here's a bit of circuit that I've used:
The transducer goes between SE1 and ground, pulse D1 to drive the transducer, take the signal at PR1 to S10 on the filter. D1 and R19 protect Q1 from the huge voltage at SE1 when the transducer is driven. Most cheapo reversing systems work like this, although they often use a dedicated chip rather than discrete components.
This is the bandpass filter and drives a 12 bit ADC on a micro.
There are single chips that will do this for you.
You can buy transducers, transformers etc from Farnell (and lots of other places too).
MK
