Traw1234
Posts: 3
Joined: Sun Aug 16, 2015 1:46 am

Help with transmitter to Pi

Sun Aug 16, 2015 1:49 am

So I love building drones. I have lots of experience building them, and a new idea that I have is to create a voice recognition based transmitter. I was thinking of using a Pi to do the voice recognition, but my problem is how to transmit the data to my receiver.

I use a receiver running on 2.4, and I was wondering if I could connect a transmitter to the serial port and bind that to my reciever. I don't have experience working with a Pi, but I'm sure I can figure it out. I would love some help on this...

Traw1234
Posts: 3
Joined: Sun Aug 16, 2015 1:46 am

Re: Help with transmitter to Pi

Mon Aug 17, 2015 5:12 am

So after doing research, it seems as if voice recognition shouldn't be a problem... Still not sure about the Tx part.

ame
Posts: 3172
Joined: Sat Aug 18, 2012 1:21 am
Location: Korea

Re: Help with transmitter to Pi

Mon Aug 17, 2015 5:51 am

Could you please describe where is the Pi (e.g. is it on the drone)? Where is the user who is speaking?

Do you have some sort of base station or controller, or is the drone autonomous?

Traw1234
Posts: 3
Joined: Sun Aug 16, 2015 1:46 am

Re: Help with transmitter to Pi

Mon Aug 17, 2015 1:56 pm

For this I was thinking of having the pi back on the ground. The only piece that is on the drone is the receiver. The part I am having a problem figuring out is how to bind a transmitter that is plugged in to the pi to the reciever on the drone.

I usually fly the drone manually.

LinuxCircle
Posts: 26
Joined: Sat May 04, 2013 2:03 am
Contact: Website

Re: Help with transmitter to Pi

Tue Aug 18, 2015 11:59 pm

You can build a simple FM radio (bug) transmitter. You need a bit of electronics soldering, but there are hundreds of schematic to help you put together resistor, transistors, etc, like this http://www.instructables.com/id/The-Ult ... ansmitter/. This little beauty can transmit clear voice up to 0.5km on 9V battery. If you use a better power and extra transistors, you could even transmit up to 5km. One thing you need to be aware of is the the law regulation in your local area on transmitting / interfering within the commercial FM band. ;)

On the recipient part, you only need a digital radio tuner like tea5767 as discussed here:
http://www.linuxcircle.com/2015/08/17/t ... rt-1-of-3/. It has a stereo output that can be linked with microphone input of a USB sound card or board on the Pi.
Last edited by LinuxCircle on Wed Aug 19, 2015 12:02 am, edited 1 time in total.
www.linuxcircle.com

ame
Posts: 3172
Joined: Sat Aug 18, 2012 1:21 am
Location: Korea

Re: Help with transmitter to Pi

Wed Aug 19, 2015 12:01 am

LinuxCircle wrote:You can build a simple FM radio (bug) transmitter. You need a bit of electronics soldering, but there are hundreds of schematic to help you put together resistor, transistors, etc, like this http://www.instructables.com/id/The-Ult ... ansmitter/. This little beauty can transmit clear voice up to 0.5km on 9V battery. If you use a better power and extra transistors, you could even transmit up to 5km. One thing you need to be aware of is the the law regulation in your local area on transmitting / interfering with the commercial FM band. ;)

On the recipient part, you only need a digital radio tuner like tea5767 as discussed here:
http://www.linuxcircle.com/2015/08/17/t ... rt-1-of-3/
OP would probably prefer to act within the law.

LinuxCircle
Posts: 26
Joined: Sat May 04, 2013 2:03 am
Contact: Website

Re: Help with transmitter to Pi

Wed Aug 19, 2015 12:04 am

ame wrote:
LinuxCircle wrote:You can build a simple FM radio (bug) transmitter. You need a bit of electronics soldering, but there are hundreds of schematic to help you put together resistor, transistors, etc, like this http://www.instructables.com/id/The-Ult ... ansmitter/. This little beauty can transmit clear voice up to 0.5km on 9V battery. If you use a better power and extra transistors, you could even transmit up to 5km. One thing you need to be aware of is the the law regulation in your local area on transmitting / interfering with the commercial FM band. ;)

On the recipient part, you only need a digital radio tuner like tea5767 as discussed here:
http://www.linuxcircle.com/2015/08/17/t ... rt-1-of-3/
OP would probably prefer to act within the law.
Yup, just buy a radio transmitting license. It could be cheap, depending on where you live. You could also use a walkie talkie / UHF concept here. Same deal: transmit, then receive.
www.linuxcircle.com

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