I'm currently looking at the Laipac modules and a bunch of others for a = telemetry system. I've been around the block on searching and laipac = definitely has the cheapest units for what they will bring. The 1200' = range and size of the unit is very attractive. However, at initial = glance, they do not have a lot of documentation on the web. I was sent = the datasheet for the 900MHz 27$ module yesterday and it was really = brief. I am very temped to order them and give it a shot. The other = option was Linx modules which have a lot of support and documentation, = including example applications. Anyone used Laipac's 900MHz modules? Regards, Michael > [Original Message] > From: G Brigley > To: > Date: 5/13/02 10:21:52 AM > Subject: Re: [EE]: RF modules > > Thanks everyone, >=20 > I hadn't heard of Laipac. Their low-end modules are pretty = competitive, > and their $27 900MHz transceivers seem pretty attractive too. >=20 > I'm not sure now which way to go. >=20 > I get the impression that the 315 and 433 MHz modules are usually used = for > "Press a button, close a relay" type applications. Maybe it's not = worth > trying to coax a multipoint data network out of them, even if = throughput > requirements are low. If I did go this route, would I be able to = control > a seperate receiver and transmitter with a pic, or should I be looking > only at integrated transceivers? >=20 > I might yet switch to 900MHz. The extra range could come in handy. = And > maybe there'd be app notes more similar to what I'm doing. >=20 > Greg >=20 > On Mon, 13 May 2002, David P. Harris wrote: >=20 > > Hi- > > I have used the 433MHz pairs. Work quite well. They also have some = 916 > > MHz pairs, and some transievers. Here's their pricelist, in US$: > > > > LP link 900 931.9375Mhz POCSAG Receiver 25.00 > > LP link xxx Customer made freq. 140 932Mhz POCSAG Receiver 25.00 > > RF900CLP Base 900MHz Voice transceiver 40ch Base 5V 12.00 > > RF900CLP Remote 900MHz Voice Transceiver 40ch Remote 3.6V 12.00 > > RF900DV Base 900MHz Data & Voice Transceiver 16ch Base @28.8K 27.00 > > RF900DV Remote 900MHz Data & Voice Transceiver 16ch Remote @28.8K = 27.00 > > RF2400DV Base 2.4Ghz Data & Voice Transceiver 16ch Base @28.8K 31.00 > > RF2400DV Remote 2.4Ghz Data & Voice Transceiver 16ch Remote @28.8K = 31.00 > > CCD-52 w/mic + Rx Complete set of 2.4Ghz CCD w/mic, Rx video/audio, = batt. > > 220.00 > > CCD-52 w/o mic + Rx Complete set of 2.4Ghz CCD w/o mic,Rx > > video/audio,batt. 210.00 > > CCD-52 w/mic CCD 2.4Ghz CCD color w/mic ( avail. Freq. = 2412/32/52/72) > > 140.00 > > CCD-51 w/mic CCD 2.4Ghz CCD color w/mic ( avail. Freq. = 2412/32/52/72) > > 136.00 > > TLP315 RF ASK Transmitter at 315Mhz 4.80 > > TLP315A RF ASK Transmitter at 315Mhz ( Smaller ) 4.80 > > TLP418 RF ASK Transmitter at 418Mhz 4.80 > > TLP418A RF ASK Transmitter at 418Mhz ( Smaller ) 4.80 > > TLP433.92 RF ASK Transmitter at 433.92Mhz 4.80 > > TLP433.92A RF ASK Transmitter at 433.92Mhz ( Smaller ) 4.80 > > TLP916-ASK RF ASK Transmitter at 916.5Mhz 7.00 > > TLP916-FSK RF FSK Transmitter at 916.5Mhz 9.00 > > RLP315 RF ASK Receiver at 315Mhz - LC Type 4.80 > > RLP315A RF ASK Receiver at 315Mhz - SAW Type 9.50 > > RLP418 RF ASK Receiver at 418Mhz - LC Type 4.80 > > RLP418A RF ASK Receiver at 418Mhz - SAW Type 9.50 > > RLP433.92 RF ASK Receiver at 433.92Mhz - LC Type 4.80 > > RLP433.92A RF ASK Receiver at 433.92Mhz - SAW Type 9.50 > > RLP916-ASK RF ASK Receiver at 916.5Mhz 13.00 > > RLP916-FSK RF FSK Receiver at 916.5Mhz 14.00 > > TLP4XX- 2W * RF FSK & FM Transmitter UHF 0.5 - 2 Watt 25.00 > > > > David > > > > Ann & David Scott wrote: > > > > > Maybe the Laipac modules will work for you? They're in Toronto. > > > A receiver/transmitter pair is less than $10US. I've used these > > > with success (garage door type application). > > > > > > I'm a bit puzzled why I haven't seen more on this list about > > > these modules. They seem to be a useful item for their low > > > cost. Can anyone comment? > > > > > > G Brigley wrote on 5/11/02 5:04 pm: > > > >Hi, > > > > > > > >I'm designing a network of > > > >devices that uses a shared > > > >wireless medium.... >=20 -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.