http://tech.groups.yahoo.com/group/SeattleRobotics/ The Seattle Robotics Society Fri, 10 Jul 2009 00:19:48 GMT Mark Kenworthy http://tech.groups.yahoo.com/group/SeattleRobotics/message/40241 http://tech.groups.yahoo.com/group/SeattleRobotics/message/40241 I have some that you can have. Mark _____ From: SeattleRobotics@yahoogroups.com [mailto:SeattleRobotics@yahoogroups.com] On Behalf Of rcrichton@... Sent: Fri, 10 Jul 2009 00:00:46 GMT Rob Purdy http://tech.groups.yahoo.com/group/SeattleRobotics/message/40240 http://tech.groups.yahoo.com/group/SeattleRobotics/message/40240 Will rain water barrels work? bigger garden places have those. To: SeattleRobotics@yahoogroups.com From: rcrichton@... Date: Thu, 9 Jul 2009 23:55:28 +0000 Thu, 09 Jul 2009 23:56:19 GMT rcrichton@... http://tech.groups.yahoo.com/group/SeattleRobotics/message/40239 http://tech.groups.yahoo.com/group/SeattleRobotics/message/40239 My nefarious schemes require a couple of food-grade barrels. Does anyone know of any sources for these in the Puget Sound area? (recycled is OK) -Bob Crichton Mon, 06 Jul 2009 19:55:22 GMT Richard Greenway http://tech.groups.yahoo.com/group/SeattleRobotics/message/40238 http://tech.groups.yahoo.com/group/SeattleRobotics/message/40238 Hopefully we get a good group going in our weekly Monday Night Chat tonight bringing their questions and expertise to the discussion. That way I won't have to Thu, 02 Jul 2009 17:57:59 GMT http://tech.groups.yahoo.com/group/SeattleRobotics/message/40237 http://tech.groups.yahoo.com/group/SeattleRobotics/message/40237 Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the SeattleRobotics group. File : Wed, 01 Jul 2009 20:11:44 GMT Kevin Rock http://tech.groups.yahoo.com/group/SeattleRobotics/message/40236 http://tech.groups.yahoo.com/group/SeattleRobotics/message/40236 Robotic rat explores and learns by touch alone Just like real rats, the sense of touch is crucial for the SCRATCHbot, which can identify objects using its Wed, 01 Jul 2009 10:54:45 GMT sunil karki http://tech.groups.yahoo.com/group/SeattleRobotics/message/40235 http://tech.groups.yahoo.com/group/SeattleRobotics/message/40235 hey!        i am trying to build a project on this hopping technology.I am hopeing to use a reactance modulator fm transmitter using a varicap Tue, 30 Jun 2009 20:16:24 GMT Edward Mitchell http://tech.groups.yahoo.com/group/SeattleRobotics/message/40234 http://tech.groups.yahoo.com/group/SeattleRobotics/message/40234 In a frequency hopping system, the transmitter and receiver simultaneously hop rapidly to new radio frequencies, only briefly landing on a frequency for a Tue, 30 Jun 2009 14:28:34 GMT Long, Dan T http://tech.groups.yahoo.com/group/SeattleRobotics/message/40233 http://tech.groups.yahoo.com/group/SeattleRobotics/message/40233 In real life, how does the Rx and Tx synchronize themselves ? And how do they know what frequency to jump to next to continue receiving the right set of Tue, 30 Jun 2009 13:51:01 GMT sunil karki http://tech.groups.yahoo.com/group/SeattleRobotics/message/40232 http://tech.groups.yahoo.com/group/SeattleRobotics/message/40232 hey docel!                  thank u for sharing , i was trying to figure out how the 2.4ghz tx/rx used in radio control hobby aircrafts are Tue, 30 Jun 2009 12:29:41 GMT docel_bangalorerobotics http://tech.groups.yahoo.com/group/SeattleRobotics/message/40231 http://tech.groups.yahoo.com/group/SeattleRobotics/message/40231 Radio SS is just the same: The transmitter is tuned (hopping) across a known spectrum of frequencies as you talk into the microphone. The receiver is also Tue, 30 Jun 2009 12:14:08 GMT docel_bangalorerobotics http://tech.groups.yahoo.com/group/SeattleRobotics/message/40230 http://tech.groups.yahoo.com/group/SeattleRobotics/message/40230 Google is the best teacher......I got 2,970,000 pages when I just asked. Cell phones, Bluetooth and modern communication networks work on Spread Spectrum. Tue, 30 Jun 2009 11:48:28 GMT sunil karki http://tech.groups.yahoo.com/group/SeattleRobotics/message/40229 http://tech.groups.yahoo.com/group/SeattleRobotics/message/40229 hey there! Can anyone help me out in understanding how a frequency hopping spread spectrum technique works? I mean how do they work it out in a radio system Tue, 30 Jun 2009 02:53:50 GMT Randy M. Dumse http://tech.groups.yahoo.com/group/SeattleRobotics/message/40228 http://tech.groups.yahoo.com/group/SeattleRobotics/message/40228 Rob Purdy said: Monday, June 29, 2009 9:19 PM ... http://www.scitoyscatalog.com/Merchant2/merchant.mvc?Screen=PROD &Product_Code=PZ Tue, 30 Jun 2009 02:44:12 GMT docel_bangalorerobotics http://tech.groups.yahoo.com/group/SeattleRobotics/message/40227 http://tech.groups.yahoo.com/group/SeattleRobotics/message/40227 So why not use a bit of Nichrome wire wrapped around the fuses and a car battery to heat it? You can use music wire of proper gauge in contact with the fuse