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2723 discussions

Arduinos etc.
by stephen＠heaveneverywhere.com 20 Jan '19

20 Jan '19

Hi all, Based on Brian's presentation at the last meeting, I thought I'd share the materials from the course I used to teach at UCSB ("MAT 594O: Sensors and Interfaces for Media Art"). UCSB MAT 594O Course materials Course presentation slides (6-per-page) http://heaveneverywhere.com/MAT594O_Slides.pdf Large ZIP files for readings and code examples http://heaveneverywhere.com/MAT594O_Reader.zip http://heaveneverywhere.com/MAT594O_Code.zip Distinctions between all these new small computers: Arduino & many relatives - Based on common Atmel (CISC) microcontrollers found in many home appliances and industrial applications; CPU includes RAM, ROM, DAC/ADC and a selection of analog and digital I/O pins; can be programmed in a simplified C where one writes a set-up function and a loop function; development tools run on desktop environments. Boards have a standardized layout of I/O p;ins, ;leading to a plethora of daughter cards ("shields") for special-purpose I/O, co-processing, etc. IOT (Internet-of-Things) Controllers (Particle Photon et al) - very minimal & low-power systems based on ARM (RISC) processors (more powerful than the Atmels); focus on stand-alone or embedded systems with WiFi or cellular connectivity; web-based development tools; also support daughter cards. Raspberry Pi - Based on ARM RISC processors and cellphone motherboards; much more powerful and complex, native HDMI graphics, Ethernet, etc.; native Linux ports and (C++, Python, etc.) development tools; also support daughter cards, though these are much higher-power (e.g., 16-channel audio I/O). Questions welcome! Stephen = W6STP -- Stephen Travis Pope Santa Barbara, California, USA http://HeavenEverywhere.com <http://heaveneverywhere.com/> http://FASTLabInc.com <http://fastlabinc.com/> https://vimeo.com/user19434036/videos <https://vimeo.com/user19434036/videos> http://heaveneverywhere.com/Reflections

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Vandenburg launch Saturday 12/8 at 8:19pm
by Dave Schmidt 13 Dec '18

13 Dec '18

Not sure if everyone knows this. Vandenburg launch Saturday 12/8 at 8:19pm PST Dave ai6vx

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(no subject)
by David Durant 10 Dec '18

10 Dec '18

Sent from Yahoo Mail on Android

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ARRL Extra Manual - trade?
by Levi C. Maaia - K6LCM 23 Nov '18

23 Nov '18

I'm looking for a copy of the latest edition of the ARRL Amateur Extra Class License Manual. I have a copy of ARRL Understanding Basic Electronics 2nd edition that I'm willing to trade for it. See attached photos. This is a good opportunity for someone who recently passed the Extra exam and has the study guide on their shelf to swap it out for something that they can use! LCM

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VetsDay1775.pdf
by Bill Talanian 10 Nov '18

10 Nov '18

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ARDF practice, this Saturday, Oct 27, at Lake Carneros
by Marvin Johnston 25 Oct '18

25 Oct '18

Just a reminder message. The five transmitter course will be on 2M, and there will be some practice transmitters available within probably 200 feet or so of the starting area. No charge for the event. ********** The next southern California on-foot transmitter hunting session will be Saturday, October 27, 2018 at Lake Los Carneros Park in Goleta. A ham radio license and knowledge of radio equipment are not required. A limited amount of RDF gear will be available for loan to beginners. Besides some easy two-meter fox transmitters just to help you learn and test your equipment, there will be a beginner-level international-rules course on the two-meter band, designed by Marvin Johnston KE6HTS. One or more optional 80-meter fox transmitters may also be on the air. The site area is slightly less than 140 acres. It is relatively flat, making it a good site for foxtailers of all skill levels. If you need some one-on-one help to get started at finding transmitters, just ask. Full-color orienteering maps will be available. For those who want to build RDF gear for use with their own two-meter hand-held radios or scanners, Marvin will have kits for measuring-tape yagis and active attenuators. Also available is an assembled and tested assembly that includes the power switch, BNC connector, housing and battery, ready to install as the tape measure beam is built. There will be tools and soldering stations for building. If you're not an electronic technician, don't worry because there will be experts to help you. We want you to succeed! If you want to build an antenna/attenuator kit, you must register in advance. Send e-mail to Marvin (marvin(a)west.net) to pre-register and get more information about equipment. If you already have equipment and just want to hunt transmitters, you don't need to pre-register. If it takes place, the building session will start at 9:00 AM. Please be prompt. Transmitter hunting will begin about 10:00 AM. You may start out on the courses at any time until 12 noon. Courses close at 2 PM. For those interested, we will meet at a local restaurant after all the transmitters have been picked up for further discussion of ARDF. Directions to Lake Los Carneros: From US 101 about 8 miles west of downtown Santa Barbara, take the Los Carneros Road exit, head north about 1/4 mile and turn right into the Stow House parking lot. There should be plenty of free parking. Look for the orange-and-white orienteering flag. The hunt start will probably be in the parking lot. If that is too crowded, we will move to a nearby picnic area. Ham radio talk-in is on the WB6OBB repeater, 147.000(+) PL 131.8. If heavy rain is forecasted, check this site on April 6 for possible cancellation. 73, Joe Moell K0OV

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EARLY AMATEUR STATIONS
by Bob Bascom 08 Oct '18

08 Oct '18

EARLY AMATEUR STATIONS When Spark Was King: http://www.sowp.org/early-amateur-stations/

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More information on ARRL and the N6AA censure
by Jay Hennigan 08 Oct '18

08 Oct '18

As many of you are aware, the SW Division Director N6AA was censured (in my opinion very unfairly) purportedly in regard to his remarks at the 2017 Visalia DX Convention. This was due to a discussion at the ARRL forum about the recently and stealthily adopted ARRL board of Directors code of conduct which severely limits what ARRL Directors can share with membership about Board decisions. Other underlying issues are ARRL's actions with regard to NTS and the language of the Amateur Radio Parity Act for which ARRL has been lobbying. This has been interpreted to be in favor of HOAs and severely limiting with regard to amateurs' ability to put up antennas in HOA communities. Documents showing the toxic atmosphere at ARRL HQ and the ongoing tactics of the E&E committee to disqualify candidates with dissenting views have been made available at http://kkn.net/n6aa/arrlcensure/ . All five districts open for election have contested elections this year with challengers calling for more transparency and openness on the part of the ARRL Board. For what it's worth, I'm on the side of N6AA and the challengers. -- Jay Hennigan - CCIE #7880 - Network Engineering - jay(a)impulse.net Impulse Advanced Communications - http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV

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Space X Launch
by Levi C. Maaia, K6LCM 07 Oct '18

07 Oct '18

Did anyone else catch the incredible SpaceX Falcon 9 launch tonight? These images taken from Santa Barbara Mesa show the launch sequence including separation of the first stage which then landed back at Vandenberg Air Force Base. It appeared as if a gaseous cloud from deep space was suddenly transported to fill a quarter of the night sky At one point after the separation of the first stage, there was a ripple effect that almost made it look like you were seeing a visual representation of radio waves coming off of the rocket. See cropped image. I’m not sure what caused that effect but it was interesting to see. LCM Levi C. Maaia, K6LCM Director at Large | Co-Chair, Telecommunications Services Committee Santa Barbara Amateur Radio Club, Inc. a 501(c)(3) nonprofit public benefit corporation www.levi.maaia.com +1.805.604.5384

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It's official!
by Jay Hennigan 04 Oct '18

04 Oct '18

Today is Citizen's Band Radio Day. -- Jay Hennigan - CCIE #7880 - Network Engineering - jay(a)impulse.net Impulse Advanced Communications - http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV

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