315MHz is another popular frequency used by remote controls. Sent from my iPad > On Sep 27, 2014, at 2:45 PM, "Bob Blick" wrote: >=20 > 433 is used a lot in the US, inside-outside thermometers for instance. > But there are rules for the field strength, length of transmission, > total transmission etc. that are much stricter than in the ISM bands. > With a typical antenna, 1 milliwatt is probably a close guess. I forget > the transmission time, but it's pretty small, maybe a few minutes per > hour and max per transmission of less than a minute. And no transmitting > at regular intervals. The thermometers get around that one by slightly > randomizing the interval between transmission. >=20 > Hope this helps. If you need particulars, when I am in my office I can > quote chapter and verse. >=20 > Friendly regards, Bob >=20 >> On Sat, Sep 27, 2014, at 09:50 AM, meshka7 wrote: >> Got two RF modules off ebay. One for 433 MHz and another for 915. My >> intention was to experiment with RF and remote control.=20 >>=20 >> Looking into band allocations in the US, I found that these frequencies >> fall >> into the amateur bands. Wikipedia shows that 433 is for ISM but only >> within >> Region 1, so I guess I'm left only with 915. >>=20 >> Am I correct here? What bands do people generally use for experimenting >> or >> making home made gadgets that use RF and that won't be sold commercially= ? >>=20 >> Thanks! >=20 > --=20 > http://www.fastmail.fm - A fast, anti-spam email service. >=20 > --=20 > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .