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https://www.free-electronic-circuits.com/circuits/radio-remote-control-using-dtmf.htmlNigel Goodwin said:I don't see why not, the coding should make it work fine with either.
okNigel Goodwin said:Oh, you mean broadcast FM radio?, you didn't make that clear, I presumed you meant licence free FM data modules. You can't easily do it with audio radio gear, and you shouldn't be trying to!.
anthony123 said:well talking about control remote with RF, in the school send me a homework, do a remote control with RF to the garage.. how i can do it??
can you help me to program the PIC'???Nigel Goodwin said:you can buy specific preprogrammed chips, Holtek sell them at very reasonable prices.
anthony123 said:can you help me to program the PIC'???
I don't know understod you.... my location filled??Nigel Goodwin said:If you had your location filled in it would give more of a chance?.
anthony123 said:I don't know understod you.... my location filled??
if u hav done with ur remote control can u attach ur schematic here with the programanthony123 said:Thanks... i have done..
well thanks a lot for this useful tip. .audioguru said:The single transistor "FM transmitter" is not good.
Its antenna is connectrd to its LC tuned circuit so its frequency changes when anything moves close to or moves away from the antenna.
It doesn't have a voltage regulator so its frequency also changes as the battery voltage runs down.
It has low power so its range might be only across a street.
Most FM transmitter projects have a low level microphone input. The DTMF generator has an output level that is much higher and will need an attenuator. There are hundreds of FM transmitter circuits and kits available.mayankguru said:tell that where to connect the pin7 of the dtmf generator UM91214b to the TRANSMITER
A radio speaker output level is too high for the circuit. The receiver will need to have the ratio of its R4 and R5 adjusted to reduce its gain and an attenuator is needed to match the output level of the radio.how to connect the FM reciever (mentioned in the receiver unit of the circuit in the link ). . .do i simply connect the two wires that are connected to the speaker of the FM reciver available in the market
They probably use AM, not FM. They do not use the broadcast bands. Their range is not far.the cheap remote door chimes which are available in the markets do they also works on FM or they use some other mode.
audioguru said:Most
They probably use AM, not FM. They do not use the broadcast bands. Their range is not far.