Go to advanced search

by Ronaldlees
Tue Jul 11, 2017 1:33 pm
Forum: General discussion
Topic: Setting bits and sample rate of a USB audiocard
Replies: 5
Views: 2176

Re: Setting bits and sample rate of a USB audiocard

Thanks for your suggestions! Davide I guess I could throw in one more thing. You can define the default interface in asound.rc , or (a lot more convenient) - you can assign the default device using the pavucontrol GUI. Virtual devices you define in asound.rc will show up in the pavucontrol GUI, (if...
by Ronaldlees
Sun Jul 09, 2017 8:04 pm
Forum: General discussion
Topic: Setting bits and sample rate of a USB audiocard
Replies: 5
Views: 2176

Re: Setting bits and sample rate of a USB audiocard

The audio hardware you own, and its associated driver, will have certain limits and capabilities. You can set the parameters you want to use when you run an audio program, knowing the capabilities of your hardware. For instance, the pacat recorder: pacat -r --rate=44100 --format=s16le --device= ... ...
by Ronaldlees
Sun Jul 09, 2017 4:17 pm
Forum: Networking and servers
Topic: Raspberry Pi 3 WiFI hotspot?
Replies: 29
Views: 96354

Re: Raspberry Pi 3 WiFI hotspot?

NAT is very powerful, but sometimes you do not want/need to give your clients that much access. Actually, the easiest way to provide (only) http/https access is to run some kind of proxy software ...
by Ronaldlees
Sun Jul 09, 2017 4:03 pm
Forum: General discussion
Topic: Tiny tiny USB Keyboards?
Replies: 5
Views: 1727

Re: Tiny tiny USB Keyboards?

I see a "Rii," but also a "FAVI Entertainment" keyboard that looks almost identical. Which is a clone of which? Rii has been longer available, so maybe that FAVI is clone. Does it matter? There are quite a few mini KBs with a similar form factor / layout Probably not. I doubt that one can patent th...
by Ronaldlees
Sun Jul 09, 2017 3:40 pm
Forum: Automation, sensing and robotics
Topic: Connect Adafruit RFM69HCW to Pi 3
Replies: 11
Views: 6455

Re: Connect Adafruit RFM69HCW to Pi 3

The NSS is the "slave select" for the RFM unit, and is controlled by your Pi's CS0 (chip select zero). Sometimes these are named oddly.
by Ronaldlees
Sun Jul 09, 2017 1:57 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Voltmeter/Ammeter Options
Replies: 4
Views: 3209

Re: Voltmeter/Ammeter Options

You could build your own voltmeter. The prebuilt ones use a voltage divider stack to adjust the voltage to be within the ADC specs. For current, you could use shunt resistors. It could be switched with GPIO relays. You'd want to fuse it conservatively, current limit it conservatively, and maybe use ...
by Ronaldlees
Sun Jul 09, 2017 1:39 pm
Forum: General discussion
Topic: hostapd wifi usb key, no headache
Replies: 5
Views: 2846

Re: hostapd wifi usb key, no headache

The RA Link 5370 works as an AP on a Pi with FreeBSD. Don't know about Rasbian tho ...

The RTL8188CUS I could never get to work as AP.
by Ronaldlees
Sun Jul 09, 2017 1:35 pm
Forum: General discussion
Topic: Tiny tiny USB Keyboards?
Replies: 5
Views: 1727

Re: Tiny tiny USB Keyboards?

I see a "Rii," but also a "FAVI Entertainment" keyboard that looks almost identical. Which is a clone of which?
by Ronaldlees
Sun Jul 09, 2017 1:31 pm
Forum: Off topic discussion
Topic: 4K HDR Capable SBC ?
Replies: 29
Views: 14873

Re: 4K HDR Capable SBC ?

The Pi3 does 4K video, but I guess the frame rate is not so hot. You could try the Odroid C2 I suppose, but that'd be heresy :-)
by Ronaldlees
Sun Jul 09, 2017 1:01 pm
Forum: Automation, sensing and robotics
Topic: Connect Adafruit RFM69HCW to Pi 3
Replies: 11
Views: 6455

Re: Connect Adafruit RFM69HCW to Pi 3

Does the Pi Zero have the same 26 pin header as in the following link?

http://rdepablos.merlitec.com/mixed/rfm ... spberry-pi
by Ronaldlees
Sun Jul 09, 2017 12:53 pm
Forum: Automation, sensing and robotics
Topic: Lipo battery leak: is it possible?
Replies: 5
Views: 1913

Re: Lipo battery leak: is it possible?

"Do not leave lithium-ion batteries in any place exposed to direct sunlight, such as a vehicle dashboard or a window sill, or exposed to high temperatures such as a vehicle parked in the sun. Doing so may cause the lithium-ion battery to leak." - a quote from http://www.baj.or.jp/e/frombaj/03.html (...
by Ronaldlees
Sat Jul 08, 2017 9:46 pm
Forum: General discussion
Topic: Pi 3's IP address translates to "localhost" on my laptop
Replies: 5
Views: 2537

Re: Pi 3's IP address translates to "localhost" on my laptop

Hello! So, I did a clean install, and it all works now. I guess I missed some steps along the way. Thank you! Hello, Like you, I'm running Wordpress on a Pi (but it's a Pi2). My setup is FreeBSD OS/ Hiawatha webserver / Unbound DNS / Sqlite database/ PHP / Wordpress. It's pretty reasonable, perform...
by Ronaldlees
Sat Jul 08, 2017 2:20 am
Forum: Off topic discussion
Topic: an odd idea
Replies: 3
Views: 1285

Re: an odd idea

So my first time posting, i got my first pi and was wondering if there is a way i can deconstruct a high-ish capacity flash drive and convert it into on-board memory for my zero w? Welcome csblizzard! Well, many good ideas seem odd when they're first posited, then are seen as genius. Alas, this is ...
by Ronaldlees
Mon Jun 12, 2017 3:36 am
Forum: General discussion
Topic: Resuscitated Pi
Replies: 0
Views: 296

Resuscitated Pi

A while back I put 20V DC onto the 5V power jack of a Pi2. There was a little smoke, and the lights went out. Querying posts on this forum, I was advised to look at a couple sites decribing the regulator replacement job. The idea didn't thrill me at the time, so I dumped the little Pi2 into the bott...
by Ronaldlees
Thu Jun 08, 2017 2:09 pm
Forum: Automation, sensing and robotics
Topic: paper money detection
Replies: 4
Views: 1789

Re: paper money detection

The OpenCV method won't check all of the things that can be checked. For instance, some countries have currency which is embedded with very tiny gauge wires, so if you live in one of those countries, you might devise a way to check for that.
by Ronaldlees
Wed May 31, 2017 7:41 pm
Forum: General discussion
Topic: Pi 3 on a sailboat
Replies: 8
Views: 1574

Re: Pi 3 on a sailboat

Pcmanbob is probably right. A step down device included in a charger port may not be very efficient. When I mentioned "charger port" - I was really talking about the "cigarette lighter" jack rather than a "real" charger port. Which do you have?
by Ronaldlees
Wed May 31, 2017 3:52 pm
Forum: General discussion
Topic: FCC Certification for Pi in a Box
Replies: 24
Views: 8424

Re: FCC Certification for Pi in a Box

It's been a long while since I had to have anything tested, but IIRC, it wasn't that terribly expensive. For a PC motherboard packaged in an enclosure with a few peripherals (no WiFi back then) - I think it was only around $1500 in 1992. The way it worked was, you got yourself an FCC account and ide...
by Ronaldlees
Wed May 31, 2017 2:55 pm
Forum: General discussion
Topic: Pi 3 on a sailboat
Replies: 8
Views: 1574

Re: Pi 3 on a sailboat

You might want to consider a power conditioner for your battery powered devices, if there's an alternator in your system. The power coming from the alternator can be quite dirty. The DC-DC converter will likely be more efficient than an inverter. After all, your Pi is DC powered. Why go from the bat...
by Ronaldlees
Sun May 28, 2017 2:03 pm
Forum: General discussion
Topic: Powering 5 120mm 12V DC fans from a PI?
Replies: 5
Views: 4881

Re: Powering 5 120mm 12V DC fans from a PI?

Agree with Rattus. Make sure you check the power requirements of your fans. They vary quite a lot. I have one small 12 VDC fan (for cpu cooling) - that pulls 250 mA of current. Five of those would be 1.25 A, and too much for some supplies (if the Pi is powered by the same supply, after a DC-DC conve...
by Ronaldlees
Sun May 28, 2017 1:43 pm
Forum: Off topic discussion
Topic: Recommendations for a good, but cheap, multimeter
Replies: 28
Views: 16054

Re: Recommendations for a good, but cheap, multimeter

Cheap multimeters usually come with terrible probes that break at the first opportunity. I never miss out on the free Harbor Freight multimeters, their probes often don't work right even out of the box, but the 9v battery works great in my Fluke. Haha - like that one too. I've had myriad number of ...
by Ronaldlees
Fri May 26, 2017 1:35 pm
Forum: Beginners
Topic: Network question
Replies: 6
Views: 1094

Re: Network question

What kind of security system did your (stolen) car have? Is that what you're trying to build a security system for, in addition to the home automation?
by Ronaldlees
Thu May 25, 2017 12:11 pm
Forum: Beginners
Topic: Network question
Replies: 6
Views: 1094

Re: Network question

If I connect it to my current WiFi am I running a risk Yes. Any connection you make outside of the box makes your risk greater than zero. Personally, I wouldn't bring my car into a home automation network. I like the story about the bloke who tapped into the hotel network, and turned every room's l...
by Ronaldlees
Wed May 24, 2017 3:57 pm
Forum: Beginners
Topic: TOR installation
Replies: 4
Views: 7164

Re: TOR installation

This is mostly from memory, so excuse any inaccuracies: The Tor-browser bundle package has a Firefox browser pre-configured to use Tor. Unfortunately, I don't think the Tor people make one for the Pi yet. Alternatively, to make some other random browser on a Pi use Tor, or to make a "regular" Firefo...
by Ronaldlees
Mon May 22, 2017 9:24 pm
Forum: Automation, sensing and robotics
Topic: Home moisture sensing
Replies: 5
Views: 1572

Re: Home moisture sensing

I just Googled "straw house" - and it seems I may have been showing my ignorance of some things. I read that the straw is densely packed, so there's not very much "surrounding air". Apparently, the point is to make sure the straw has a low moisture content before it's encased in plaster. Then, theor...
by Ronaldlees
Mon May 22, 2017 8:35 pm
Forum: Automation, sensing and robotics
Topic: Home moisture sensing
Replies: 5
Views: 1572

Re: Home moisture sensing

In industry they often take a piece of the material, weigh it, dry it, and re-weigh it to check the difference and calculate the moisture. That's not very automatic, and the interface to the Pi is not too viable there.

Go to advanced search