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January 14, 2007
amateur radio, high altitude balloons, R/C
Product COM-12710 |
Looks like LED displays have come full circle as this is very similar to one of the first 7 segment multiple digit displays that became available back around 1970 except I believe it was only 3 digits (and I believe was also from HP).
Product TOL-11766 |
about 2 months ago
A lot less expensive than a brand name DSO, but still a lot for many of us to risk buying one without knowing exactly how well it actually performs and it would sure be nice to find a totally impartial fairly in-depth review from someone that has bought one. I’m currently using a Tek dual trace 100MHz analog scope and one of the main features that interests me is viewing pre-trigger information in order to see and help track down the source, for example, of a very short random pulse that’s causing a problem.
Product CAB-11304 |
about 2 years ago
I’ve been using the SF BOB-00718 USB to Serial boards with a FTDI chip as I don’t want RS-232, but simply TTL serial data. It gives access to all of the flow control signals, the boards have been used for all kinds of things and have always worked great except for PIC ICP & ICD using MCS (MicroCode Studio) software. The FTDI DTR line has always worked properly with other software, but MCS obviously uses some code that requires a native RS-232 port and hard to know if other programing software has used similar code, or not, so no guarantee USB ports will work in every case. Anyway, if anyone else is using MCS and looking for a solution, other than using an old PC with a “real” serial port, a PCI express RS232 adapter card worked for me, but I would still prefer to be able to use my SF USB to serial boards so please speak up if anyone knows some magic setting that will fix the problem (or how to convince MCS that it needs to fix their software).
Product COM-10594 |
about 3 years ago
These are Free?
News - AVC 2011!!! |
about 3 years ago
Midair collisions? Similar problem ground vehicles will have to face and be programmed to avoid in order to win with other vehicles present. As for spectators underneath - light weight falling parts aren’t nearly as dangerous as a powered flying aircraft.
It’s always a good idea to make spectators aware of the dangers present whenever model aircraft are flown, but with multiple autonomous aircraft competing at the same time they should perhaps also be advised to TAKE COVER. (lol)
By the way, I’m certainly not suggesting to have multiple aircraft compete at the same time - just saying that it would be possible and that dealing with the Midair problem would be similar to the extra problem multiple ground vehicles will also have to deal with.
Why can’t you do multiple planes at once? Wouldn’t be much different then multiple ground vehicles.
News - Happy Free Day |
about 3 years ago
What a waste of time, entirely unfun and earned you guys absolutely no goodwill. Couldn’t even get a response from the web site until it was all over. I’m not complaining about getting no free money, but think you could find a much better way to give something back to those that suport you and doesn’t waste everyone’s time (except for a very few).
News - Sending a Balloon Into Ne… |
about 3 years ago
I would also like to know what kind of antennas were used for the XTend modems and if there was any problem maintaining a solid data connection through out the flight.
We track our HAB packages via amateur radio APRS transmissions every 30-60 sec’s, but have some scientific payloads planned that we would like to receive a constant data stream from and plan to also use the same XTend modems, but it’s always nice to learn and build upon what others have already done and learned rather then possibly trying things others have already found to not work.
Easiest way to visualise the data in Google Earth is to use amateur radio APRS like most HAB groups do to track payloads. APRS i-gate stations feed all APRS data to the internet and you simply need to go to http://aprs.fi/, enter the callsign assigned to your tracker to track it’s position on the map on that page and then click on the Google Earth KML link to view the data in 3D using Google Earth.
If not a licensed amateur already, getting a license is quite easy or you can simply get a licensed amateur to help with your launch. And for a tracker, I doubt there’s anything simplier then the RTrack-HAB that Jason at RPCElectronics mentioned earlier and will have available shortly. It’s a complete tracker with a Trimble GPS made for operation above the 60K ft ITAR limit most receivers are programmed to stop operating at. (Many receivers actually stop operating at much lower altitudes, like 10-20K ft.)
Tutorial - HAB - Lessons Learned |
about 4 years ago
Some friends and myself have been having HAB launches for a number of years (http://bear.sbszoo.com/) and each flight is a great adventure and more fun then the last. Most importent is to leave nothing to chance (as there’s no way to fix a mistake once a balloon is released) and to run predictions before launching to know where the balloon will go and if one should perhapes launch a different day to save having to drive further then one wants or perhapes landing in a hard to reach area or where large bodies of water are present. As for tracking payloads, amateur radio APRS makes locating payloads the easiest and the RTrak-HAB tracker others mentioned is an excellent ready to use tracker for those not wanting to build something from scratch. Thanks Nathan for an excellent tutorial. I get numerous enquires from others wanting info on how to launch their own payloads and I now have a single place to direct them to that includes links to all the other main sites with additional information.
No public wish lists :(