Keith, I am working on a novelty project. I am currently looking at a product purchased at Spencer's gift shop. It is a remote controlled fart machine. You can see the product I purshed at: http://www.thefartmachine.com/product.htm I did not buy it at that link, I only found the link by searching for the name on the package. Anyway, the receiver (aka noise maker) needs 4 AAA batteries. The transmitter comes with a small alkaline battery already installed!! It is a A23 12VDC The transmitter has a LED indicator and is in a relatively nice keychain car alarm style package. I am considering using the board out of the fart machine to do what I need, and to use the keychain remote as it sits. But it is interesting looking at the circuit boards involved to see how simple they are. Anyway, the shelf price at the high priced Spencer's is 16.99 and I have seen it on the net for much less. I don't think I can build my own transmitter and receiver for less. My target is about 100 units. Anyway, I am considering tracing out the circuit used is this device for reference. As of yet, I do not even know the frequency this thing works at. I know the transmitter is very simple, and the receiver is using a quad opamp. Any input will be appreciated, Giles >From: Keith Christopher >Reply-To: pic microcontroller discussion list >To: PICLIST@MITVMA.MIT.EDU >Subject: Re: [PICLIST] [PIC]: RF Transmitters - Micro size >Date: Mon, 4 Feb 2002 07:19:05 -0800 > >What are you looking to do with this transceiver ? >What freq ? There is TONS of FM band transceivers on >the WWW, a few caps, resistors, transistor and >inductor and your on the air. You can with SMT make a >small one, however your range is going to be limited. > > >Keith > > > >--- Giles Honeycutt wrote: > > Tal, > > I am interested in something similar. I have a low > > budget project, I need a > > simple RF transmitter and receiver. I have been > > looking for a off-the-shelf > > keychain transmitter. But I can't seem to find any > > cheap ones. All I have > > found is over $20.00 > > I found a gag gift that has a transmitter and > > receiver at Spensers and it is > > only $16.99! It has a keychain remote in it!!! > > Anyway, I need a source for keychain remote and a > > low cost receiver. > > Anyway, some info that this list gave me in the > > recent past is summed up in > > a few links for RF stuff: > > > > home.att.net/~wzmicro/rf.html > > www.rentron.com/ or > > www.rentron.com/PicBasic/RemoteControl.htm > > www.rfdigital.com/ > > www.micrel.com/index.shtml > > Maybe something will help, if you find a good > > keychain remote, please let me > > know. > > > > Best regards, > > Giles > > > > > > > > > > >From: Tal Bejerano - AMC > > >Hi 2 All > > > > > >Did someone met/saw a very small RF transmitters? I > > mean very small 4-5 mm > > >size. > > >low voltage and very low power. > > > > > >Thanks > > > > > >Tal > > > > > > > > > >_________________________________________________________________ > > Send and receive Hotmail on your mobile device: > > http://mobile.msn.com > > > > -- > > http://www.piclist.com hint: The list server can > > filter out subtopics > > (like ads or off topics) for you. See > > http://www.piclist.com/#topics > > > > > > >__________________________________________________ >Do You Yahoo!? >Great stuff seeking new owners in Yahoo! Auctions! >http://auctions.yahoo.com > >-- >http://www.piclist.com#nomail Going offline? Don't AutoReply us! >email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > _________________________________________________________________ Chat with friends online, try MSN Messenger: http://messenger.msn.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.