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by Mortimer
Fri Jun 29, 2018 9:11 pm
Forum: Raspbian
Topic: Hmm! I can't log in.
Replies: 5
Views: 363

Re: Hmm! I can't log in.

It's a drop down box, and isn't complaining that the password entered is wrong. It just goes back to the login dialogue every time. If I deliberately put the wrong password in, it tells me the password was wrong and asks me to try again.
by Mortimer
Fri Jun 29, 2018 7:39 pm
Forum: Raspbian
Topic: Hmm! I can't log in.
Replies: 5
Views: 363

Hmm! I can't log in.

I hadn't sat at my Pi for a couple of days, so I thought I would do an update. So I did a reboot first. This took longer than usual, and rather than boot to desktop as it usually did, it presented a login box, with a drop down set to "Pi". I put in the password, the screen goes black, the login dial...
by Mortimer
Thu Jun 21, 2018 8:01 am
Forum: General discussion
Topic: PMs being turned off from June 13
Replies: 54
Views: 6617

Re: STICKY: PMs being turned off from June 13

As I pointed out years ago children can not use this site. They can not agree to the terms and conditions. That doesn't mean that they don't though, and I recall that we have had people under the age of 14 posting here in the past. That would be like saying building site contractors don't need to w...
by Mortimer
Fri May 25, 2018 5:52 am
Forum: General discussion
Topic: Logic Simulator for Raspberry Pi 3 B+?
Replies: 4
Views: 1289

Re: Logic Simulator for Raspberry Pi 3 B+?

Appears to be installed by default too.
I just typed "smartsim" into the command line out of curiosity and SmartSim appeared on the screen.
by Mortimer
Tue May 22, 2018 3:44 pm
Forum: General discussion
Topic: PMs being turned off from June 13
Replies: 54
Views: 6617

Re: STICKY: PMs being turned off from June 13

Is there an answer as to whether or not this affects/breaks the "Report this post" function?
by Mortimer
Mon May 21, 2018 6:14 pm
Forum: General discussion
Topic: PMs being turned off from June 13
Replies: 54
Views: 6617

Re: STICKY: PMs being turned off from June 13

How does that affect the "Report this post" button?
I can't recall if I have ever used it here, but in forums I have moderated in the past, the reporting mechanism used the PM system. Will that at least work between user reporting posts and moderators/admins?
by Mortimer
Sun May 20, 2018 11:17 am
Forum: Advanced users
Topic: Pi 3 B+ fries if 3V3 rail is shorted to 5V
Replies: 19
Views: 5376

Re: Pi 3 B+ fries if 3V3 rail is shorted to 5V

Crikey...
Stick one of these over the 5V GPIO pins, and problem solved...
Image
:lol:
by Mortimer
Fri Mar 23, 2018 12:18 pm
Forum: Beginners
Topic: Phototransistors in parallel not working
Replies: 6
Views: 508

Re: Phototransistors in parallel not working

Can't see your diagram.
Is the link broken?
by Mortimer
Fri Mar 09, 2018 6:53 am
Forum: Media centres
Topic: Dual Screen In-Car Setup (Pi 3)
Replies: 3
Views: 1774

Re: Dual Screen In-Car Setup (Pi 3)

https://www.commsandsound.com/avlink-hds12-4k-hdmi-splitter-1x2.html AVLINK HDS12 - 4K HDMI SPLITTER 1X2 4K HDMI splitter to connect a single HDMI source to multiple displays at the same time. Use with HDMI cables of a combined 25m per output for HD resolution, or a combined 16m per output for 4K re...
by Mortimer
Sat Mar 03, 2018 2:08 pm
Forum: Off topic discussion
Topic: What was your first computer?
Replies: 440
Views: 170250

Re: What was your first computer?

My first exposure to computing was back in secondary school in the early 80's. I joined a coding club, and the only thing we had access to was a single teletype terminal. At the start of the sessions the ritual was to pick up an old GPO style telephone, dial a number, wait for the screeching at the ...
by Mortimer
Wed Feb 28, 2018 3:00 pm
Forum: The MagPi
Topic: How to electrocute yourself
Replies: 8
Views: 3775

Re: How to electrocute yourself

Probably not that important, but although the section has been removed from the electronic version of the magazine, the contents pages haven't been updated, so this stills shows "Make A Wifi Desk Lamp 50". There are no pages 50 and 51, the numbers go straight from 49 to 52. Surprised not to see a wa...
by Mortimer
Wed Feb 28, 2018 11:38 am
Forum: Off topic discussion
Topic: Maplin in trouble
Replies: 16
Views: 2676

Re: Maplin in trouble

In my opinion Maplin has been sliding downhill for quite a long time. When I first started using Maplin it was a rather large paper catalogue, which not only listed components and prices but had a lot of information about those components with circuit ideas and interesting diagrams. I used to spend ...
by Mortimer
Wed Feb 28, 2018 10:29 am
Forum: Beginners
Topic: HDMI to VGA adapter with audio
Replies: 3
Views: 616

Re: HDMI to VGA adapter with audio

If it helps I got one of these: https://www.aliexpress.com/item/Vention-HDMI-to-VGA-adapter-Digital-to-Analog-Video-Audio-Converter-Cable-1080p-for-Xbox-360/32792577173.html?spm=a2g0s.9042311.0.0.MEKJvr Works a treat. I got the one with audio and power. It has so far worked fine without the addition...
by Mortimer
Mon Feb 26, 2018 8:32 pm
Forum: Mathematica
Topic: Plot a circle.
Replies: 9
Views: 11835

Re: Plot a circle.

You have more than one brain! Lucky you! ;)
by Mortimer
Fri Feb 09, 2018 4:57 pm
Forum: Beginners
Topic: mini usb leds
Replies: 17
Views: 1770

Re: mini usb leds

I would still buzz them out, it is not unknown for wires to be swapped in low cost Chinese sourced components.
by Mortimer
Thu Feb 08, 2018 11:45 pm
Forum: Beginners
Topic: raspbian jesse vs raspbian stretch
Replies: 8
Views: 24829

Re: raspbian jesse vs raspbian stretch

No, Stretch is the most recent, and therefore youngest... https://www.debian.org/releases/ The next release of Debian is codenamed buster — no release date has been set Debian 9 (stretch) — current stable release Debian 8 (jessie) — obsolete stable release Debian 7 (wheezy) — obsolete stable release...
by Mortimer
Sat Feb 03, 2018 7:49 am
Forum: Beginners
Topic: What is pi E9U6?
Replies: 6
Views: 906

Re: What is pi E9U6?

My Google-foo led me to these: https://www.cooking-hacks.com/documentation/tutorials/gprs-gsm-quadband-module-arduino-raspberry-pi-tutorial-sim-900/ https://www.itead.cc/raspberry-pi-sim900-gsm-gprs-add-on-v1-0.html So firstly there seems to be guidance on how to use modules like or similar to the o...
by Mortimer
Sat Jan 27, 2018 8:47 am
Forum: Automation, sensing and robotics
Topic: electronics to controll four LED stripes individually
Replies: 3
Views: 520

Re: electronics to controll four LED stripes individually

There might be a problem using that board with 24V lamps. The board appears to require 12Vdc to drive the output stage and this is coupled with the + output connections. The optoisolator output stage may be tolerant to 24Vdc on the Vpp rail, but I would worry about the mosfet gate voltage being a li...
by Mortimer
Fri Jan 26, 2018 6:48 am
Forum: General discussion
Topic: Wireless firmware testers wanted
Replies: 81
Views: 17562

Re: Wireless firmware testers wanted

I use a RPi3 as a VNC client for an ESXi box. It didn't work reliable over wifi, so I through I would try this out. I am now getting "Turn Off Wifi - No APs found - scanning..." constantly in the menu bar. Reverted to the original firmware and that is doing the same. So I might have a different issue.
by Mortimer
Tue Jan 16, 2018 11:32 am
Forum: General discussion
Topic: Eben Upton on BBC Radio 4 "The Life Scientific"
Replies: 26
Views: 3660

Re: Eben Upton on BBC Radio 4 "The Life Scientific"

Now he is a celeb', how long before we see him on 'Strictly'?
by Mortimer
Sun Jan 14, 2018 5:58 pm
Forum: General discussion
Topic: New EP music-album entirely on the Raspberry Pi
Replies: 7
Views: 1102

Re: New EP music-album entirely on the Raspberry Pi

Amazing and awesome.

I agree the RPi sound is surprisingly warm.

I would love to see a video about how you did this. What tools and techniques? What software? How long it took? etc...
by Mortimer
Wed Jan 10, 2018 5:43 pm
Forum: Python
Topic: HELP! , Relay module always on
Replies: 4
Views: 1158

Re: HELP! , Relay module always on

The product code you gave us relates to just the relay. What board is the relay on? Where does the board come from? Did any instruction or diagrams come with the board?
by Mortimer
Tue Jan 09, 2018 10:49 am
Forum: Beginners
Topic: mini usb leds
Replies: 17
Views: 1770

Re: mini usb leds

It looks like a solution to use a USB socket is being followed. In case there was any doubt however, the other thing to be careful of with USB powered devices, is that often the USB plug body is where electronics is hidden. It is unlikely in this case, although there might be a resistor or constant ...
by Mortimer
Wed Dec 20, 2017 2:28 pm
Forum: General discussion
Topic: 12V relay schematics
Replies: 25
Views: 4314

Re: 12V relay schematics

The schematic looks to me like the lock is wired to a normally closed (NC) contact. I.e. when the GPIO output is low, the circuit is closed and the lock is fed 12V and activates. If the RPi outputs a high on the GPIO then the relay should switch over and disconnect the 12V supply from the lock. Thin...

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