USB doesnt work over 50'. any ideas?
Re: USB doesnt work over 50'. any ideas?
There is a small computer called raspberry Pi this might help with the usb problem.
Re: USB doesnt work over 50'. any ideas?
how would that help?
Re: USB doesnt work over 50'. any ideas?
by allowing to transfer date between the topside computer and the rov. You can take remote control of the raspberry Pi from the topside computer to control the usb inputs: cameras, sensors, relay boards, etc. then you would only need a network cable.
This is one way to minimize cables in the umbilical.
the control signals can also be networked on the cat 5 wire by using an ethernet connected relay board like this:
http://www.digital-loggers.com/din.html or this: http://www.controlanything.com/Relay/Re ... 8_ETHERNET
I think this would solve the long USB problem and allow for different controls.
This is one way to minimize cables in the umbilical.
the control signals can also be networked on the cat 5 wire by using an ethernet connected relay board like this:
http://www.digital-loggers.com/din.html or this: http://www.controlanything.com/Relay/Re ... 8_ETHERNET
I think this would solve the long USB problem and allow for different controls.
Re: USB doesnt work over 50'. any ideas?
FIRST OF ALL, HAPPY CAPSLOCK DAY AND HAPPY TAU DAY.
secondly, I was on #arduino (irc.freenode.net) and they helped me with this issue. Basically the arduino only communicates with a computer via serial (Note that USB != serial). On the arduino there is a USB to TTL serial chip which routes the communication as serial to pins TX and RX. Basically you can run any TTL serial line into the pins and it works. However, TTL level serial isnt exactly long distance, so I'm stepping it up to RS232 (please note that RS232, TTL, etc, only define voltages, timings, etc, not the actual data being sent). RS232 has a max distance of 147ft at 19.2k baud over a cat5 cable. I dont need that fast and plan to use 9.6k baud which means I can get 1470ft off the cable! (see here http://www.lammertbies.nl/comm/info/RS-232_specs.html). Best part is USB to RS232 converters are common and cheap, or you might already have a RS232 port.
Then all you need at the other end is a RS232 to TTL chip and ur good to go.
If anyone else wants help with what I did in more detail, feel free to PM me.
secondly, I was on #arduino (irc.freenode.net) and they helped me with this issue. Basically the arduino only communicates with a computer via serial (Note that USB != serial). On the arduino there is a USB to TTL serial chip which routes the communication as serial to pins TX and RX. Basically you can run any TTL serial line into the pins and it works. However, TTL level serial isnt exactly long distance, so I'm stepping it up to RS232 (please note that RS232, TTL, etc, only define voltages, timings, etc, not the actual data being sent). RS232 has a max distance of 147ft at 19.2k baud over a cat5 cable. I dont need that fast and plan to use 9.6k baud which means I can get 1470ft off the cable! (see here http://www.lammertbies.nl/comm/info/RS-232_specs.html). Best part is USB to RS232 converters are common and cheap, or you might already have a RS232 port.
Then all you need at the other end is a RS232 to TTL chip and ur good to go.
If anyone else wants help with what I did in more detail, feel free to PM me.