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by rpdom
Tue Dec 18, 2018 10:41 am
Forum: Advanced users
Topic: HDMI output and overscanning
Replies: 2
Views: 43

Re: HDMI output and overscanning

I've never had a problem with a Raspberry Pi and an LCD monitor , but the overscan issue is to do with TV screens and the historical fact that TV signals had to allow for the time it took for the old CRT screens to get back to the start of the next line. Modern screens don't need this, but it is par...
by rpdom
Tue Dec 18, 2018 10:28 am
Forum: Troubleshooting
Topic: RPi fried? but still boots.
Replies: 2
Views: 34

Re: RPi fried? but still boots.

Ideally, use a dedicated motor driver module. They are not expensive.
by rpdom
Tue Dec 18, 2018 10:21 am
Forum: General discussion
Topic: Temperature sensor without breadbord
Replies: 13
Views: 4280

Re: Temperature sensor without breadbord

ds18b20 also works without issues on 3.3V.. not sure if the GPIO on which you read the datapin likes it if the sensors VCC is 5V. :lol: The data pin on the DS18B20 is open collector output, so the Vcc on the sensor doesn't matter, just as long as the pull-up resistor for the data is connected to 3....
by rpdom
Mon Dec 17, 2018 10:00 pm
Forum: Compute Module
Topic: eMMC flash memory reliability
Replies: 12
Views: 2459

Re: eMMC flash memory reliability

Interesting "Raspberry Pi do change flash suppliers over time" Aren't products built by 3rd parties, eg Sony, RS, Farnell etc ( excluding the Zero?) so does the RPF specify the suppliers to use? Only the Compute Modules have on-board flash memory. I have no idea who decides on suppliers, but it is ...
by rpdom
Mon Dec 17, 2018 9:55 pm
Forum: Automation, sensing and robotics
Topic: Raspberry Pi - Sunrise/Sunset Timer for Christmas Lights
Replies: 29
Views: 26403

Re: Raspberry Pi - Sunrise/Sunset Timer for Christmas Lights

Cheap garden solar lights are marvels of "just enough tech to work". They use a very cheap PWM controller to switch between charging and lighting. Shame they all use NiCd batteries - but I've had ones still light up despite 5 Canadian winters and ant/spider infestations. One reason they use NiCd ba...
by rpdom
Mon Dec 17, 2018 6:18 pm
Forum: Off topic discussion
Topic: What are main differences between Git, GitHub and Bitbucket resp Gitkraken? And also Git and Mercurial
Replies: 3
Views: 79

Re: What are main differences between Git, GitHub and Bitbucket resp Gitkraken? And also Git and Mercurial

I don't know all the answers to your questions.
sayhello wrote:
Mon Dec 17, 2018 4:12 pm
first of all: - afaik i can use Bitbucket with GIT - is this true?
This one I do know. The answer is Yes.
by rpdom
Sun Dec 16, 2018 10:36 pm
Forum: General discussion
Topic: Server busy?
Replies: 10
Views: 257

Re: Server busy?

Imperf3kt wrote:
Sun Dec 16, 2018 10:27 pm
I recall a couple of years back, a company called RoosterTeeth essentially had its fans / customers DOS the site by trying to login at the same time
I remember a few years back when RS and Farnell had similar problems after a new product was announced (I forget the name of it at the moment ;-) )
by rpdom
Sun Dec 16, 2018 9:11 pm
Forum: General discussion
Topic: enterprise mongodb
Replies: 8
Views: 178

Re: enterprise mongodb

soydepr wrote:
Sun Dec 16, 2018 9:00 pm
unable to install mongodb
Not surprising when you try to install the amd64 (64-bit PC) version, instead of an armhf (ARM 32-bit) version that would run on a Pi.
by rpdom
Sun Dec 16, 2018 7:33 pm
Forum: Beginners
Topic: Need additional independent USB ports
Replies: 4
Views: 133

Re: Need additional independent USB ports

Which Pi do you have. Does your camera work with it? My guess is no, the Pi's USB goes directly to the SOC. On B and B+ model Pi's, this is then broken out to four USB ports anx a LAN port via an on board USB hub. On zero and A and A+ models, there is no USB hub, hence, only a single port. On the 3...
by rpdom
Sun Dec 16, 2018 3:24 pm
Forum: General discussion
Topic: Wifi 5GHz not working
Replies: 24
Views: 491

Re: Wifi 5G

There are (at least) two possible interpretations of what OP means by "Wifi 5G". I assumed he meant the upcoming new standard (we have 3G, and 4G. 5G is just around the corner!) Everyone else seems to have assumed he meant 5Ghz. It seems pretty obvious to me. The clue is "WiFi". The other "5G" is m...
by rpdom
Sun Dec 16, 2018 12:38 pm
Forum: Beginners
Topic: DNS being changed, do i need to rebooot?
Replies: 1
Views: 44

Re: DNS being changed, do i need to rebooot?

I have been reading that raspbian dosn't have a DNS cache, if thats correct and our DNS TTL is set to 30 mins does that mean that after 30 mins the RPI will check the DNS record and update as necessary and therefore start using the new DNS record and check in to tthe server via the new IP address ?...
by rpdom
Sat Dec 15, 2018 6:44 am
Forum: Camera board
Topic: Rasppberry Pi v2 Camera Module
Replies: 5
Views: 231

Re: Rasppberry Pi v2 Camera Module

I don't know how, but you should move this thread to camera forum for being noticed by people with kmowledge/interest with cameras: https://www.raspberrypi.org/forums/viewforum.php?f=43 Report the post to the moderators and ask for it to be moved. They will be happy to do it for you. I've reported ...
by rpdom
Tue Dec 11, 2018 3:31 pm
Forum: Graphics, sound and multimedia
Topic: pi 3 b+ composite to scart, working untill booted completely
Replies: 2
Views: 66

Re: pi 3 b+ composite to scart, working untill booted completely

Have you set the composite output type to PAL? The default is NTSC which may work on some screens and not on others.
by rpdom
Tue Dec 11, 2018 4:46 am
Forum: Off topic discussion
Topic: Why Avoid BASIC on RPi?
Replies: 777
Views: 17600

Re: Why Avoid BASIC on RPi?

So I would bet that you really had fun with the Archimedes when you got it? Oh yes. I went to the launch party in London, met some fun people and tried a few things out. Also visited Acorn in Cambridge to trial some software. I finally bought myself an A310, which got upgraded from Arthur to RISC O...
by rpdom
Tue Dec 11, 2018 4:18 am
Forum: Off topic discussion
Topic: Why Avoid BASIC on RPi?
Replies: 777
Views: 17600

Re: Why Avoid BASIC on RPi?

I am guessing then that you used an ARMv1 board on a beeb? Switching on one of my Beebs and seeing "Acorn Computer 4096K" was a hell of a kick at the time :-) I bet, wow. I bet that seemed lightning fast back then too? It did. It also made duplicating floppy disks with a single drive a lot easier. ...
by rpdom
Mon Dec 10, 2018 10:24 pm
Forum: Off topic discussion
Topic: Why Avoid BASIC on RPi?
Replies: 777
Views: 17600

Re: Why Avoid BASIC on RPi?

DavidS wrote:
Mon Dec 10, 2018 10:11 pm
I am guessing then that you used an ARMv1 board on a beeb?
Switching on one of my Beebs and seeing "Acorn Computer 4096K" was a hell of a kick at the time :-)
by rpdom
Mon Dec 10, 2018 10:19 pm
Forum: Troubleshooting
Topic: GPIO troubles
Replies: 4
Views: 113

Re: GPIO troubles

Sd card is removed. https://youtu.be/POkFZhMbcpg Ok, I was wrong. Pin 2 is 5V, not 3.3V. Major brain failure. Your readings look normal. Battery test shows 9.6V (ish) which is fine for a new 9V battery. Next test showed about 5V between Pin 2 (+5V - black lead) and pin 39 (ground - red lead). That ...
by rpdom
Mon Dec 10, 2018 9:58 pm
Forum: Off topic discussion
Topic: Why Avoid BASIC on RPi?
Replies: 777
Views: 17600

Re: Why Avoid BASIC on RPi?

DavidS wrote:
Mon Dec 10, 2018 9:47 pm
TWIN is not GUI based. So no not TWIN. And to run TWIN on newer version of RISC OS requires using !GraphTask to support the old screen mode.

I did say GUI based text editors.
My first ARM system didn't have a GUI. Also I didn't see a need for that overloaded bloat. ;-)
by rpdom
Mon Dec 10, 2018 8:12 pm
Forum: General discussion
Topic: MariaDB ODBC
Replies: 5
Views: 152

Re: MariaDB ODBC

Yes, it absolutely has to be ODBC. I don't so much mind MariaDB - it seems to just be some fork of MySQL... (so long as it works with the MySQL syntax)... this of course leads me to why this is so poorly supported... im pretty sure a MySQL driver of ODBC would work fine for MariaDB... libmyodbc see...
by rpdom
Mon Dec 10, 2018 7:18 pm
Forum: Off topic discussion
Topic: Why Avoid BASIC on RPi?
Replies: 777
Views: 17600

Re: Why Avoid BASIC on RPi?

The GUI based text editor built into the OS ROM (from RISC OS 3.1 on) has this ability, it is called !Edit. Every text editor on RISC OS has been able to do this. Even TWIN? That's the editor I used to start with with ARM based systems. It didn't (AFAIK) tokenise anything. BASIC files were just tex...
by rpdom
Mon Dec 10, 2018 12:36 pm
Forum: Advanced users
Topic: SSH via Docker
Replies: 2
Views: 93

Re: SSH via Docker

Creating your own VPN hub seems to be a common way. https://jordancrawford.kiwi/setting-up-tinc/ That's pretty much the way I do it, except I have two "cloud" tinc servers, one at Vultr and one at Digital Ocean. This means I can still connect to my home network if one of them is unavailable. I also...
by rpdom
Mon Dec 10, 2018 6:25 am
Forum: Troubleshooting
Topic: GPIO troubles
Replies: 4
Views: 113

Re: GPIO troubles

Is it possible you are measuring the pins the wrong way? All the Ground pins on the Pi are connected together. It is impossible for any of them to be anything other then 0V (when compared to any other ground pin). Check https://pinout.xyz for the proper orientation of the pins. Getting voltages like...
by rpdom
Mon Dec 10, 2018 6:04 am
Forum: Advanced users
Topic: Need help making a deb package
Replies: 3
Views: 206

Re: Need help making a deb package

There are plenty of Debian guides on how to make a .deb file. I've made a few for local use myself. It's mostly a matter of building the file structure that the files will need to be installed to (with correct permissions and ownership set), then creating some files in a "DEBIAN" sub-directory which...
by rpdom
Sun Dec 09, 2018 6:16 pm
Forum: Troubleshooting
Topic: Broken Pi? (SMD part came off)
Replies: 5
Views: 142

Re: Broken Pi? (SMD part came off)

Yes, you can boot up the Pi without issues, just, as you have guessed, the WiFi won't work (or will have a very short range).
See this thread for details of what the part is and does: viewtopic.php?t=200759

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