V vignesh.baskar New Member Jan 30, 2010 #1 i need a transmitter circuit which would work even when it is in the water.. please give me any ideas or redirect me to the sites.it s urgent
i need a transmitter circuit which would work even when it is in the water.. please give me any ideas or redirect me to the sites.it s urgent
audioguru Well-Known Member Most Helpful Member Jan 30, 2010 #2 A radio controlled toy submarine stops working when it is deeper than only 1m.
B BrownOut Banned Jan 30, 2010 #4 Sound travells great through water. I always thought it would be interesting to try an ultrasonic transmitter for deep water control.
Sound travells great through water. I always thought it would be interesting to try an ultrasonic transmitter for deep water control.
Vizier87 Active Member Jan 30, 2010 #5 Like sonar? It'll be nice if they can simulate that mysterious shark's ability to smell blood miles away through electronics.
Like sonar? It'll be nice if they can simulate that mysterious shark's ability to smell blood miles away through electronics.
M mneary New Member Jan 31, 2010 #6 In the US, GSM is at a fairly high frequency (900+ MHz??), making them useless at an even more shallow depth than conventional RC modules (72-75MHz). If you're thinking about the service in the US called FRS and GMRS, they are in the 460MHz area, but I don't think remote control is allowed. Last edited: Jan 31, 2010
In the US, GSM is at a fairly high frequency (900+ MHz??), making them useless at an even more shallow depth than conventional RC modules (72-75MHz). If you're thinking about the service in the US called FRS and GMRS, they are in the 460MHz area, but I don't think remote control is allowed.
Hero999 Banned Jan 31, 2010 #7 Radio can travel through water but you need to use a very low frequency: 50kHz is often used for communication with submarines. Sound is much better so a hydrophone is more commonly used.
Radio can travel through water but you need to use a very low frequency: 50kHz is often used for communication with submarines. Sound is much better so a hydrophone is more commonly used.