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Hacker Public Radio

Your ideas, projects, opinions - podcasted.

New episodes Monday through Friday.


Welcome to HPR the Community Podcast Network

We started producing shows as Today with a Techie 10 years, 6 months, 29 days ago. Our shows are produced by listeners like you and can be on any topic that "are of interest to Hackers". If you listen to HPR then please consider contributing one show a year. If you record your show now it could be released in 28 days.

Latest Shows


hpr2023 :: Setting up my Raspberry Pi 3

I bought a RPi 3, a case, a heatsink and an SSD and have set the Pi up as a server


Hosted by Dave Morriss on 2016-05-04 and released under a CC-BY-SA license.
Listen in ogg, spx, or mp3 format. Comments (1)

Setting up my Raspberry Pi 3

I bought a Raspberry Pi 3 in March 2016, soon after it was released. I want to use it as a server since it's the fastest Pi that I own, so I have tried to set it up in the best way for that role.

In this episode I describe what I did in case you want to do something similar.

Refer to the full notes for the details: http://hackerpublicradio.org/eps/hpr2023/full_shownotes.html


hpr2022 :: Whats in my bag

What I carry in my computer bag when I hit the road.

Hosted by Bitbox on 2016-05-03 and released under a CC-BY-SA license.
Listen in ogg, spx, or mp3 format. Series: What's in My Toolkit | Comments (1)

  • Swissgear messenger bag
    http://www.conrad.com/ce/en/product/977572/Swissgear-Yukon-156-to-173-Laptop-Bag-Wenger-SwissGear-SWISSGEAR-173-Black (this link is to a newer version, closest I could find to my 7 year old bag)
    This bag has been with me since 2009, and for about the last 3 years did double duty, carrying both of my laptops with other assorted gear, and has held up beautifully, No fabric wear, not a stitch or seam broken anywhere. Both zippers are intact and still pull smooth and easily, they haven't even lost the pull-tabs (usually my first issue with any zipper). The handle and the shoulder strap are reasonably comfortable (for a single shoulder strap) and show no signs of wear either. Can't recommend this bag enough if you are looking for a tough messenger bag. If you are going to haul 2 laptops around (plus gear) I would strongly recommend something with 2 shoulder straps though, if you're doing any serious walking about.

  • Toshiba Satellite P855-S5312
    http://www.cnet.com/products/toshiba-satellite-p855-s5312-15-6-core-i5-3210m-windows-8-6-gb-ram-750-gb-hdd-series/specs/
    I beefed up the ram to 16gb and removed the optical drive in order to install a second hard drive. I also replaced the original 750gb spinning HDD. The new drives were both samsung evo 500gb SSD's. http://www.newegg.com/Product/Product.aspx?Item=9SIA2W02DV8166 My only real gripe about this laptop is the screen resolution, which maxes out at 1366x768. IMHO, this is a waste of real estate on a 15.6 inch screen. I am looking into this, but replacement with a higher resolution screen seems to be unfeasible, from what I am reading. ( IF YOU HAVE SUGGESTIONS OR KNOW OF A SOLUTION I WOULD LOVE TO HEAR ABOUT IT!!)

  • The old HP Pavillion dv5-1235dx
    http://www.cnet.com/products/hp-pavilion-dv5-1235dx-15-4-core-2-duo-t6400-vista-home-premium-64-bit-4-gb-ram-320-gb-hdd-series/specs/
    (I dont presently haul this one around anymore) Got this one in '09. nice screen doing 1680x1050 , but I didn't care for the plastic housing. I like the metal case on the toshiba. - although older, I really liked this laptop, and still prefer the keyboard (although somewhat cramped) over the one on my Toshiba. The feel of the keys themselves and the distinctive stroke and light click as you press down through the detent, just feels better than the chiclet keyboard on my newer machine. Incidentally, I once spilled a rum and coke across this thing, keyboard and all, while it was powered down. After dry out and a good cleaning, it fired up and still works. I don't recommend trying to re create this experiment though. Dumb luck, I suppose. I was sure it would be a deader.

  • Wacom intuos cth480 pen/touch tablet
    http://www.amazon.com/Wacom-Intuos-Tablet-Certified-Refurbished/dp/B00Q7FU5YS
    (this thing isn't available in this form anymore) these are very nice and work out of the box for me on debian, and mint, (cant speak for other distros). Getting the pen's pressure sensitivity settings in some drawing programs (krita, gimp, etc) can sometimes be a bit fiddly and sometimes hard to find. Overall works quite well, although I am not a professional artist. Trucker, remember? Fun to play with, and reasonably small so its good travel size.

  • Toshiba 2TB 'canvio' portable hard drive
  • Western Digital 2TB 'my passport ultra' portable hard drive
    I carry one of these (WD) for extra storage and backups of my laptop. The other ( the Toshiba) I use mostly for storage of my movies and TV series collections (gotta have your firefly fix, right?). As to which one is better, I prefer the case on the Toshiba, just seems more durable in that high impact plastic, but I will let you know when one of them fails me :)

and for those real long distance wifi signals (and/or getting into monitor mode):

(missed these in the audio)

  • zebra f-301 ballpoint pens, black ink, 2 in fine point and 2 in medium
  • several cheap highlighter markers and one sharpie

Just to be clear...I included many of the links here from Amazon and other shopping sites, or from c-net, because I couldn't see how to load my pictures in with the notes, not because I want to give product reviews or sell anyone anything. I know it can be done, because I see it elsewhere, I'm just too tired to figure it out now. next one. As I understand it, I owe at least 2-3 shows. Be patient with me Ken, I'm workin' on it.


hpr2021 :: HPR Community News for April 2016

HPR Community News for April 2016

Hosted by HPR Volunteers on 2016-05-02 and released under a CC-BY-SA license.
Listen in ogg, spx, or mp3 format. Series: HPR Community News | Comments (0)

New hosts

Welcome to our new hosts:
Joe, brian.

Last Month's Shows

Id Day Date Title Host
2000 Fri 2016-04-01 How to Point a Satellite Dish Ken Fallon
2001 Mon 2016-04-04 HPR Community News for March 2016 HPR Volunteers
2002 Tue 2016-04-05 Just got a Raspberry Pi Zero swift110
2003 Wed 2016-04-06 Using the Incron file watching daemon b-yeezi
2004 Thu 2016-04-07 A First Look at the Owon B35T NYbill
2005 Fri 2016-04-08 How I prepare and record my HPR Kdenlive voiceover shows. Geddes
2006 Mon 2016-04-11 Basic Audio Production - Compression Nacho Jordi
2007 Tue 2016-04-12 My new laptop Dave Morriss
2008 Wed 2016-04-13 HPR needs shows to survive. Ken Fallon
2009 Thu 2016-04-14 Understanding the GNU/Screen Hardstatus line Curtis Adkins (CPrompt^)
2010 Fri 2016-04-15 Parsing JSON with Python klaatu
2011 Mon 2016-04-18 Introduction to sed - part 4 Dave Morriss
2012 Tue 2016-04-19 Parsing XML in Python with Untangle klaatu
2013 Wed 2016-04-20 Parsing XML in Python with Xmltodict klaatu
2014 Thu 2016-04-21 A first look at the Owon B35T Part 2 NYbill
2015 Fri 2016-04-22 Linux in the Church Joe
2016 Mon 2016-04-25 Echoprint laindir
2017 Tue 2016-04-26 Here are my thoughts on a 3D printer Kit. cheeto4493
2018 Wed 2016-04-27 How to make Komboucha Tea b-yeezi
2019 Thu 2016-04-28 a pi project and an owncloud project Matt McGraw (g33kdad)
2020 Fri 2016-04-29 Automotive Billing brian

Mailing List discussions

Policy decisions surrounding HPR are taken by the community as a whole. This discussion takes place on the Mail List which is open to all HPR listeners and contributors. The discussions are open and available on the Gmane archive.

The main threads this month were:

  1. From: NYbill <nybill@...>
    Date: 2016-04-04 17:08:54 -0400
    Subject: Fwd: Re: Defaults...
    Link: http://comments.gmane.org/gmane.network.syndication.podcast.hacker-public-radio/1159
    Messages: 1

  2. From: Ken Fallon <ken@...>
    Date: 2016-04-05 20:20:08 +0200
    Subject: Call for shows
    Link: http://comments.gmane.org/gmane.network.syndication.podcast.hacker-public-radio/1160
    Messages: 5

  3. From: Mike Ray <mike@...>
    Date: 2016-04-06 13:45:38 +0100
    Subject: HTML notes accessibility pointer
    Link: http://comments.gmane.org/gmane.network.syndication.podcast.hacker-public-radio/1161
    Messages: 7

  4. From: Curtis Adkins <curtadkins@...>
    Date: 2016-04-09 21:26:57 -0400
    Subject: Upload show issue
    Link: http://comments.gmane.org/gmane.network.syndication.podcast.hacker-public-radio/1168
    Messages: 2

  5. From: Ken Fallon <ken@...>
    Date: 2016-04-12 08:12:09 +0200
    Subject: Fwd: CFP for Full Stack Fest 2016 has opened!
    Link: http://comments.gmane.org/gmane.network.syndication.podcast.hacker-public-radio/1170
    Messages: 1

  6. From: Ken Fallon <ken@...>
    Date: 2016-04-19 13:21:58 +0200
    Subject: 11th Annual People's Podcast Awards
    Link: http://comments.gmane.org/gmane.network.syndication.podcast.hacker-public-radio/1175
    Messages: 1

  7. From: Ken Fallon <ken@...>
    Date: 2016-04-21 15:46:34 +0200
    Subject: Fwd: for your podcast: interview about FOSS situation in Russia
    Link: http://comments.gmane.org/gmane.network.syndication.podcast.hacker-public-radio/1176
    Messages: 1

  8. From: Frank Bell <frankwbell@...>
    Date: 2016-04-21 13:37:59 -0400
    Subject: Proposed New Series
    Link: http://comments.gmane.org/gmane.network.syndication.podcast.hacker-public-radio/1177
    Messages: 8

  9. From: Carl D Hamann <carl.hamann@...>
    Date: 2016-04-22 10:42:04 -0500
    Subject: Re: Proposed New Series
    Link: http://comments.gmane.org/gmane.network.syndication.podcast.hacker-public-radio/1184
    Messages: 2

  10. From: Dave Morriss <perloid@...>
    Date: 2016-04-25 15:27:13 +0100
    Subject: HPR Community News - next Saturday on 2016-04-30T18:00:00Z
    Link: http://comments.gmane.org/gmane.network.syndication.podcast.hacker-public-radio/1187
    Messages: 5

  11. From: Fifty OneFifty <fiftyonefifty@...>
    Date: 2016-04-25 21:56:10 -0500
    Subject: Re: Hpr Digest, Vol 91, Issue 11
    Link: http://comments.gmane.org/gmane.network.syndication.podcast.hacker-public-radio/1189
    Messages: 3

  12. From: Carl D Hamann <carl.hamann@...>
    Date: 2016-04-25 23:01:41 -0500
    Subject: Re: HPR Community News - next Saturday on 2016-04-30T18:00:00Z
    Link: http://comments.gmane.org/gmane.network.syndication.podcast.hacker-public-radio/1191
    Messages: 1

  13. From: Dave Morriss <perloid@...>
    Date: 2016-04-30 18:21:57 +0100
    Subject: Re: HPR Community News - next Saturday on 2016-04-30T18:00:00Z
    Link: http://comments.gmane.org/gmane.network.syndication.podcast.hacker-public-radio/1196
    Messages: 1
Total messages this month: 38

Comments this month

These are comments which have been made during the past month, either to shows released during the month or to past shows.

There are 46 comments:



hpr2019 :: a pi project and an owncloud project

A short episode where I describe a couple of geeky projects I've been working on


Hosted by Matt McGraw (g33kdad) on 2016-04-28 and released under a CC-BY-SA license.
Listen in ogg, spx, or mp3 format. Comments (2)

HPR - A couple of Projects I've been working on

  1. Intro

    • Please record a show!!!!!
    • Couple of Projects
  2. Pi Project

    • Love of Music
    • Digital, of course and webradio
    • Sonos, other proprietary solutions
    • Got a Pi2 for XMas
    • Pi Music Box
    • RuneAudio
    • Arch Based
    • underlying tech is MPD
    • flash SD Card
    • boot with network cable attached
    • add music and webradios to library
    • .pls and .m3u files
  3. PhotoFrame Project

    • proprietary items
    • tablet/smart phone lying around
    • ownCloud
    • update for my parents on the road

Links and other Goodies

Pi Project
SomaFM
Capital Public Radio
Sonos
Samsung Shape
PiMusicBox
Rune Audio
Music Player Daemon
USB Audio Dongle (amazon link... NOT an affiliate link)

PicFrame Project
ownCloud
Kindle Fire HD 6
PicFrame
PicFrame Android App

Contact Info
Matt McGraw - matty at the strangeland dot net
Stay-At-Home G33k Dad ~ Fatherhood in the digital age
@sahg33kdad
Google+ www.google.com/+MattMcGraw

The following link includes a photo of the RPi in the bookshelf with the stereo as well as a screenshot of the Rune Audio app running on my Android phone.
https://cloud.thestrangeland.net/index.php/s/CdbU1povrcproZQ


hpr2018 :: How to make Komboucha Tea

Here, I describe how to brew your own komboucha tea.

Hosted by b-yeezi on 2016-04-27 and released under a CC-BY-SA license.
Listen in ogg, spx, or mp3 format. Series: Home Brewing | Comments (0)

How to Make Kamboucha Tea

Makes about 1 gallon

Ingredients

Ingredient US Metric
water 3 1/2 quarts ??
white sugar 1 cup ??
black tea 8 bags (or 2 tablespoons loose tea) ??
starter tea from last batch of kombucha or store-bought 2 cups ??
scoby 1 per fermentation jar N/A

Optional flavoring extras for bottling: 1 to 2 cups chopped fruit, 2 to 3 cups fruit juice, 1 to 2 tablespoons flavored tea (like hibiscus or Earl Grey), 1/4 cup honey, 2 to 4 tablespoons fresh herbs or spices

Equipment

  • Stock pot
  • 1-gallon glass jar or two 2-quart glass jars
  • Bottles: Six 16-oz glass bottles with plastic lids, 6 swing-top bottles, or clean soda bottles

Instructions

Note: Avoid prolonged contact between the kombucha and metal both during and after brewing. This can affect the flavor of your kombucha and weaken the scoby over time.

1. Make the Tea Base: Bring the water to a boil. Remove from heat and stir in the sugar to dissolve. Drop in the tea and allow it to steep until the water has cooled. Depending on the size of your pot, this will take a few hours. You can speed up the cooling process by placing the pot in an ice bath.

2. Add the Starter Tea: Once the tea is cool, remove the tea bags or strain out the loose tea. Stir in the starter tea. (The starter tea makes the liquid acidic, which prevents unfriendly bacteria from taking up residence in the first few days of fermentation.)

3. Transfer to Jars and Add the Scoby: Pour the mixture into a 1-gallon glass jar (or divide between two 2-quart jars, in which case you'll need 2 scobys) and gently slide the scoby into the jar with clean hands. Cover the mouth of the jar with a few layers of cheesecloth or paper towels secured with a rubber band.

4. Ferment for 7 to 10 Days: Keep the jar at room temperature, out of direct sunlight, and where it won't get jostled. Ferment for 7 to 10 days, checking the kombucha and the scoby periodically.

It's not unusual for the scoby to float at the top, bottom, or even sideways. A new cream-colored layer of scoby should start forming on the surface of the kombucha within a few days. It usually attaches to the old scoby, but it's ok if they separate. You may also see brown stringy bits floating beneath the scoby, sediment collecting at the bottom, and bubbles collecting around the scoby. This is all normal and signs of healthy fermentation.

After seven days, begin tasting the kombucha daily by pouring a little out of the jar and into a cup. When it reaches a balance of sweetness and tartness that is pleasant to you, the kombucha is ready to bottle.

5. Remove the Scoby: Before proceeding, prepare and cool another pot of strong tea for your next batch of kombucha, as outlined above. With clean hands, gently lift the scoby out of the kombucha and set it on a clean plate. As you do, check it over and remove the bottom layer if the scoby is getting very thick.

6. Bottle the Finished Kombucha: Measure out your starter tea from this batch of kombucha and set it aside for the next batch. Pour the fermented kombucha (straining, if desired) into bottles, along with any juice, herbs, or fruit you may want to use as flavoring. Leave about a half inch of head room in each bottle. (Alternatively, infuse the kombucha with flavorings for a day or two in another jar covered with cheesecloth, strain, and then bottle. This makes a cleaner kombucha without "stuff" in it.)

7. Carbonate and Refrigerate the Finished Kombucha: Store the bottled kombucha at room-temperature out of direct sunlight and allow 1 to 3 days for the kombucha to carbonate. Until you get a feel for how quickly your kombucha carbonates, it's helpful to keep it in plastic bottles; the kombucha is carbonated when the bottles feel rock solid. Refrigerate to stop fermentation and carbonation, and then consume your kombucha within a month.

8. Make a Fresh Batch of Kombucha: Clean the jar being used for kombucha fermentation. Combine the starter tea from your last batch of kombucha with the fresh batch of sugary tea, and pour it into the fermentation jar. Slide the scoby on top, cover, and ferment for 7 to 10 days.

Additional Notes:

• Batch Size: To increase or decrease the amount of kombucha you make, maintain the basic ratio of 1 cup of sugar, 8 bags of tea, and 2 cups starter tea per gallon batch. One scoby will ferment any size batch, though larger batches may take longer.

• Putting Kombucha on Pause: If you'll be away for 3 weeks or less, just make a fresh batch and leave it on your counter. It will likely be too vinegary to drink by the time you get back, but the scoby will be fine. For longer breaks, store the scoby in a fresh batch of the tea base with starter tea in the fridge. Change out the tea for a fresh batch every 4 to 6 weeks.

• Other Tea Options: Black tea tends to be the easiest and most reliable for the scoby to ferment into kombucha, but once your scoby is going strong, you can try branching out into other kinds. Green tea, white tea, oolong tea, or a even mix of these make especially good kombucha. Herbal teas are ok, but be sure to use at least a few bags of black tea in the mix to make sure the scoby is getting all the nutrients it needs. Avoid any teas that contain oils, like earl grey or flavored teas.

• Avoid Prolonged Contact with Metal: Using metal utensils is generally fine, but avoid fermenting or bottling the kombucha in anything that brings them into contact with metal. Metals, especially reactive metals like aluminum, can give the kombucha a metallic flavor and weaken the scoby over time.

Troubleshooting Kombucha

• It is normal for the scoby to float on the top, bottom, or sideways in the jar. It is also normal for brown strings to form below the scoby or to collect on the bottom. If your scoby develops a hole, bumps, dried patches, darker brown patches, or clear jelly-like patches, it is still fine to use. Usually these are all indicative of changes in the environment of your kitchen and not a problem with the scoby itself.

• Kombucha will start off with a neutral aroma and then smell progressively more vinegary as brewing progresses. If it starts to smell cheesy, rotten, or otherwise unpleasant, this is a sign that something has gone wrong. If you see no signs of mold on the scoby, discard the liquid and begin again with fresh tea. If you do see signs of mold, discard both the scoby and the liquid and begin again with new ingredients.

• A scoby will last a very long time, but it's not indestructible. If the scoby becomes black, that is a sign that it has passed its lifespan. If it develops green or black mold, it is has become infected. In both of these cases, throw away the scoby and begin again.

• To prolong the life and maintain the health of your scoby, stick to the ratio of sugar, tea, starter tea, and water outlined in the recipe. You should also peel off the bottom (oldest) layer every few batches. This can be discarded, composted, used to start a new batch of kombucha, or given to a friend to start their own.

• If you're ever in doubt about whether there is a problem with your scoby, just continue brewing batches but discard the kombucha they make. If there's a problem, it will get worse over time and become very apparent. If it's just a natural aspect of the scoby, then it will stay consistent from batch to batch and the kombucha is fine for drinking.


hpr2017 :: Here are my thoughts on a 3D printer Kit.

Bought a 3D printer kit. My thoughts on how it went together.

Hosted by cheeto4493 on 2016-04-26 and released under a CC-BY-SA license.
Listen in ogg, spx, or mp3 format. Comments (0)

I purchased a 3D printer kit from AliExpress.

http://www.aliexpress.com/item/Free-shipping-High-Quality-Precision-Reprap-Prusa-i3-DIY-3d-Printer-kit-with-2-Roll-Filament/32424257787.html

Here are some after thoughts on how I liked it, a little overview of 3D printers and why I bought this one.

Pictures of the printer as assembled, and a few items I printed http://www.travestylabs.com/3Dprinter/

I hope to make this into a series about software, tips and modifications, and other thoughts I have to share about it.


hpr2016 :: Echoprint

I share what I've learned about the Echoprint music identification system


Hosted by laindir on 2016-04-25 and released under a CC-BY-SA license.
Listen in ogg, spx, or mp3 format. Comments (1)

Ken's message asking about programmatically checking for the intro and outro: http://thread.gmane.org/gmane.network.syndication.podcast.hacker-public-radio/1039

The Echoprint website: http://echoprint.me

Codegen source code: https://github.com/echonest/echoprint-codegen

Echoprint - An Open Music Identification Service: https://www.ee.columbia.edu/~dpwe/pubs/EllisWP11-echoprint.pdf

Server source codehttps://github.com/echonest/echoprint-server


hpr2015 :: Linux in the Church

How I'm using Linux for many of my projects at church.

Hosted by Joe on 2016-04-22 and released under a CC-BY-SA license.
Listen in ogg, spx, or mp3 format. Comments (2)

Linux has been my exclusive OS for many years. When I became the tech director at my church I wanted to utilize the power and freedom of Open Source so I'm gradually implementing it on many of my projects.

Photo of the rig in the church


hpr2014 :: A first look at the Owon B35T Part 2

More clicking of things, Bluetooh happens, things are taken apart...


Hosted by NYbill on 2016-04-21 and released under a CC-BY-SA license.
Listen in ogg, spx, or mp3 format. Comments (3)

In this episode of HPR you get to hear more of the things on NYbill's electronics bench that make clicking noises.

The review of the Owon B35T's continues. Bluetooth is now working. And we get an inside look at the meter.