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by piglet
Wed Feb 06, 2019 11:08 pm
Forum: Troubleshooting
Topic: sudo reboot halts....for ages...what now?
Replies: 3
Views: 131

Re: sudo reboot halts....for ages...what now?

After an upgrade it now tells me what the "problem" is on restart:

[***] A stop job is running for Fail2Ban Service (2min 5s / 3min)

Perhaps related to : https://github.com/fail2ban/fail2ban/issues/1588

I have my pi exposed to the internet....it gets a LOT of attempts...
by piglet
Wed Feb 06, 2019 9:47 pm
Forum: Beginners
Topic: Is 5V 1A enough for Raspberry Pi 3 B+
Replies: 9
Views: 302

Re: Is 5V 1A enough for Raspberry Pi 3 B+

It's not enough for a 3B+

This may help: https://www.raspberrypi.org/documentati ... /README.md

[Edit that page is out of date]

https://www.raspberrypi.org/forums/view ... p?t=208110
by piglet
Tue Feb 05, 2019 8:10 pm
Forum: Troubleshooting
Topic: sudo reboot halts....for ages...what now?
Replies: 3
Views: 131

sudo reboot halts....for ages...what now?

Hi I need to do a restart so I do "sudo reboot" on my Pi - but it just sits there saying: [ OK ] Removed slice User Slice of pi [ OK ] Stopping Permit User Sessions [ OK ] Stopped triggerhappy global hotkey daemon [ OK ] Stopped Login Service [ OK ] Started Plymouth Reboot Screen [ OK ] Stopped Perm...
by piglet
Fri Jan 18, 2019 3:52 pm
Forum: General discussion
Topic: new to soldering - safety questions, etc.
Replies: 46
Views: 1206

Re: new to soldering - safety questions, etc.

I did that with my first cheapie soldering iron to try and clean it - and it got eaten away next time I used it.

Replaced with a Weller at a good price on Ebay and very happy.

Does anyone know of a good cheap source of solder? My last roll was expensive and came from Maplin... shows how much I use!
by piglet
Fri Dec 14, 2018 4:46 pm
Forum: General discussion
Topic: Raspberry pi as a local network
Replies: 3
Views: 166

Re: Raspberry pi as a local network

Why not run an mqtt server on the pi and connect the node-mcu's to that. That's what I'm using at home - node-mcu's and pi's controlling all the christmas lights...with connectivity back to a master pi. What the master pi does with the info is up to you. Something along these lines: https://www.bald...
by piglet
Fri Dec 14, 2018 4:23 pm
Forum: Off topic discussion
Topic: More printing on the Pi bottom please
Replies: 17
Views: 2111

Re: More printing on the Pi bottom please

An annoyance which could be solved by a little more wording on the PCB. Sounds like a reasonable request.

Shame the GPIOs can't be labelled too...
by piglet
Wed Nov 28, 2018 9:51 pm
Forum: Other projects
Topic: Controlling Christmas lights of different voltages - common ground OK?
Replies: 6
Views: 1197

Re: Controlling Christmas lights of different voltages - common ground OK?

Yuup. It works with the extra 5v supply, common ground. All the hardware is working as intended.

Now to complete the code.
by piglet
Wed Nov 28, 2018 3:30 pm
Forum: Other projects
Topic: Controlling Christmas lights of different voltages - common ground OK?
Replies: 6
Views: 1197

Re: Controlling Christmas lights of different voltages - common ground OK?

Thanks, Yes, I'm switching at the ground end on the led strip. I had come to the conclusion that I did have to make a common ground. Otherwise there's no way for the MOSFET to know when the Pi GPIO signal is high or low as that can only be by reference to the ground. Learning stuff all the time. I l...
by piglet
Wed Nov 28, 2018 12:00 pm
Forum: Other projects
Topic: Controlling Christmas lights of different voltages - common ground OK?
Replies: 6
Views: 1197

Controlling Christmas lights of different voltages - common ground OK?

I'm currently using some IRLB8721 MOSFETs off three GPIOs to control a 12v led strip. The 12v supply's ground is connected to the Pi's ground. Sort of like this, but using a Pi (this is the clearest wiring diagram I could find): https://learn.adafruit.com/rgb-led-strips/usage If I want to add into t...
by piglet
Tue Nov 20, 2018 9:54 pm
Forum: Advanced users
Topic: Broken Gpio
Replies: 13
Views: 1494

Re: Broken Gpio

You've not given enough detail for anyone to assist you.

It would help if you posted the schematic you're using.
by piglet
Fri Oct 05, 2018 10:34 am
Forum: General discussion
Topic: "Unfortunately, I do not have a scope, nor does anybody I know."
Replies: 12
Views: 678

"Unfortunately, I do not have a scope, nor does anybody I know."

Unfortunately, I do not have a scope, nor does anybody I know. The only tool I do have, is a digital multimeter my uncle gave me. I read this today and I totally relate to it. Any time I try and build something and run in to problems I do a search on the internet... Actually, I should rephrase that...
by piglet
Fri Sep 28, 2018 10:25 pm
Forum: Other projects
Topic: Lookign for some advise on best way to proceed - synchronisation/remote control
Replies: 5
Views: 551

Re: Lookign for some advise on best way to proceed - synchronisation/remote control

MQTT is new to me. Wow! It sure makes life easy for you to get connectivity. Thanks for the recommendation. That lets me concentrate on getting the functionality I need rather than messing about with socket programming like I thought I might have to. https://www.dropbox.com/s/rxdj9qw1qgsr0lk/mqtt.JP...
by piglet
Fri Sep 28, 2018 2:07 pm
Forum: Other projects
Topic: Lookign for some advise on best way to proceed - synchronisation/remote control
Replies: 5
Views: 551

Lookign for some advise on best way to proceed - synchronisation/remote control

Hi, I have a server raspberry pi (3b). It has a lot of things running on it including a web server. I have some Perl scripts on the server providing a UI to the settings on remote hardware The remote hardware is a range of other things - Raspberry Pi, ESP32 and ESP8266 which periodically poll a Perl...
by piglet
Mon Aug 20, 2018 1:21 pm
Forum: Beginners
Topic: can't boot PI3 after dropping the heat sink onto the board by accident
Replies: 16
Views: 614

Re: can't boot PI3 after dropping the heat sink onto the board by accident

You and your son have our sympathy. If re-flashing the sd card doesn't help it's likely there's nothing to be done but to replace the board. I doubt there's anyone here who's done much with electronics who hasn't had an accident at some point which has broken something. I made my once-only mistake w...
by piglet
Mon Aug 20, 2018 1:11 pm
Forum: Off topic discussion
Topic: What was your 1st game?
Replies: 49
Views: 15141

Re: What was your 1st game?

"Skiing" game - typed in line by line from a paper magazine to a 1K ZX81 machine. You had to "steer" the blob left and right through a series of blobs marking a ski course by pressing left and right buttons. Quickly followed by "let's see how I can change the code to make it more fun". There was no ...
by piglet
Mon Jul 23, 2018 3:20 pm
Forum: General discussion
Topic: Wifi adapter that actually works out of the box
Replies: 9
Views: 1561

Re: Wifi adapter that actually works out of the box

Official Raspberry Pi WiFi dongle https://www.raspberrypi.org/products/usb-wifi-dongle/ and Edimax N150/EW-7811UN (RTL8188CUS chipset) Your link doesn't work. Try: https://www.raspberrypi.org/products/raspberry-pi-usb-wifi-dongle/ Which is supposed to direct you to http://uk.rs-online.com/web/gener...
by piglet
Mon Jul 23, 2018 1:19 pm
Forum: General discussion
Topic: We're looking at introducing more swag - what would you like to see?
Replies: 62
Views: 3148

Re: We're looking at introducing more swag - what would you like to see?

T shirts less garish, with logo not central but to the left; possibly more likely to appeal to the less extrovert, which to be honest is probably more the market here!
by piglet
Mon Jul 23, 2018 10:09 am
Forum: General discussion
Topic: We're looking at introducing more swag - what would you like to see?
Replies: 62
Views: 3148

Re: We're looking at introducing more swag - what would you like to see?

How about a soft raspberry pi rainbow unicorn? ...they come up every time someone mentions Pi 4+ so would be nice to be able to buy one.
by piglet
Thu Jul 19, 2018 1:54 pm
Forum: Troubleshooting
Topic: Pi Zero woes
Replies: 2
Views: 188

Re: Pi Zero woes

1) Why an OTG adapter?

2) Try the latest raspbian rather than noobs
by piglet
Mon Jul 16, 2018 8:34 am
Forum: Automation, sensing and robotics
Topic: Is it possible to read the value of a UK dimmer switch with Raspberry Pi?
Replies: 21
Views: 964

Re: Is it possible to read the value of a UK dimmer switch with Raspberry Pi?

Sounds to me like the OP is asking whether a dimmer switch can be used as/like a rotary encoder; not necessarily anything to do with mains voltages (I sure hope)
by piglet
Thu Jul 12, 2018 10:28 am
Forum: General discussion
Topic: Thinking of writing a technical FAQ
Replies: 53
Views: 1912

Re: Thinking of writing a technical FAQ

Which FAQ area are you thinking about adding to? A new technical faq at the root of the docs tree. I'm sure this must be very familiar to you - but I've never seen this before. It's not easily found by any new person likely to need to know the information. I can't see any mention of "github" on the...
by piglet
Tue Jul 10, 2018 1:28 pm
Forum: General discussion
Topic: Thinking of writing a technical FAQ
Replies: 53
Views: 1912

Re: Thinking of writing a technical FAQ

Which FAQ area are you thinking about adding to?

The only obvious one is the main site "help" area https://www.raspberrypi.org/help/

or, possibly if you get as far as here the forum FAQ one: app.php/help/faq
by piglet
Mon Jul 09, 2018 8:09 am
Forum: Troubleshooting
Topic: Power through 5v GPIO
Replies: 3
Views: 187

Re: Power through 5v GPIO

However doing that you will bypass the polyfuse that gives you a certain amount of protection.

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