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by SteveDee
Sat Apr 18, 2015 7:26 am
Forum: Beginners
Topic: A+ shuts down ALL the way (no it isn't, but close)
Replies: 23
Views: 2021

Re: A+ shuts down ALL the way

LinuxHippy2002 wrote:That's not almost 0...
My notes may help: http://captainbodgit.blogspot.co.uk/201 ... ark-2.html

The A+ should drop to below 30mA, but at least one of my A+ boards sat at 50mA.
by SteveDee
Mon Apr 13, 2015 5:46 pm
Forum: Beginners
Topic: PCManFM 1.2.3 deleting Bookmarks?
Replies: 9
Views: 2783

Re: PCManFM 1.2.3 deleting Bookmarks?

...If I right (or left) click a book-mark it just takes me to the book-marked location :-( I have not (so far) seen a menu such as you describe... The pop-up should look like this:- bookmarkmenu.png Is right-click working for you in the file manager? Try right-clicking on a file, you should see ano...
by SteveDee
Sun Apr 12, 2015 8:49 pm
Forum: Beginners
Topic: PCManFM 1.2.3 deleting Bookmarks?
Replies: 9
Views: 2783

Re: PCManFM 1.2.3 deleting Bookmarks?

pipuppy wrote:...I wonder if anyone can tell me how to delete bookmarks in PCManFM 1.2.3 please...
You should be able to right-click on the book-mark, a pop-up menu will appear, and then select "Remove From Bookmarks"
by SteveDee
Thu Apr 09, 2015 5:53 pm
Forum: Automation, sensing and robotics
Topic: Off-Net Temperature Graphing
Replies: 13
Views: 4128

Re: Off-Net Temperature Graphing

I have a quick question, I am currently logging data to a sqlite3 database readings from all 6 sensors connected to my pi, I am hoping you can confirm that the examples you have provided will be able to handle more than one data line at a time. Eg. can all 6 sensors be plotted over the top of one a...
by SteveDee
Wed Apr 08, 2015 7:46 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Remove interference from long GPIO wire
Replies: 22
Views: 5551

Re: Remove interference from long GPIO wire

... fitting a capacitor across the gpio input at the Pi end of the wires... [/quote] Looking at your post again this morning on a sensible screen (instead of my stupid phone) I now realise that the components are local to the Pi, not the switch. So try something like this:- RemSwitch.png With the s...
by SteveDee
Tue Apr 07, 2015 9:02 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Remove interference from long GPIO wire
Replies: 22
Views: 5551

Re: Remove interference from long GPIO wire

...do you mean parallel to the 0.1uF or in another place? Yes, initially across the 0.1uF, but you can continue to experiment, and use values based upon what you already have. You could also try fitting a capacitor across the gpio input at the Pi end of the wires. If your software is polling a gpio...
by SteveDee
Tue Apr 07, 2015 7:11 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Remove interference from long GPIO wire
Replies: 22
Views: 5551

Re: Remove interference from long GPIO wire

...T does anyone have a pointer or idea of how to avoid this false edge in this case? I am guessing adding another capacitor somewhere is the solution, but where? So as you have said, the obvious solution is to separate the mains cable from your signal wires. Even with networking, network cable sho...
by SteveDee
Tue Apr 07, 2015 6:41 pm
Forum: Automation, sensing and robotics
Topic: Farm video surveillance system without wired supply
Replies: 3
Views: 917

Re: Farm video surveillance system without wired supply

... Is it possible to implement such a system with battery supply and solar panels? How much sustainable and reliable this system is? I get (up to) 60hr run time on my battery powered bird boxes using a 12Volt 12Ahr lead acid battery: http://captainbodgit.blogspot.co.uk/2015/01/birdbox2015-picaxe-c...
by SteveDee
Tue Apr 07, 2015 6:16 pm
Forum: Advanced users
Topic: Will these relays stand a chance?
Replies: 4
Views: 897

Re: Will these relays stand a chance?

oskars wrote:...Are these relays able to handle a 2000W heat plate (230V)?...
Well, these relays should handle 230V ac x 10A = 2300W if the load is purely resistive...does that help?
by SteveDee
Tue Apr 07, 2015 6:02 pm
Forum: Troubleshooting
Topic: Power issue
Replies: 4
Views: 697

Re: Power issue

...i didn't think a "long" cable could cause me all these problems.. Maybe posting a simple wiring diagram would help us consider your problem. 10m of twisted pair cable is not a great length, but of course it depends upon how much current your remote circuit is drawing: Vdrop = Rcable x ILoad If y...
by SteveDee
Fri Apr 03, 2015 9:02 pm
Forum: Troubleshooting
Topic: Raspberry Pi A+ USB port bent pins
Replies: 51
Views: 11990

Re: Raspberry Pi A+ USB port bent pins

...I only have an 18 Watt Antex iron here... That should be enough, but you will need a short dumpy bit, not a long pointy one! ...I might try it again 'properly' with my reflow gun :) Then again, I might just leave it if it continues to work well. If you keep applying heat by changing connectors, ...
by SteveDee
Sun Mar 22, 2015 6:54 pm
Forum: Advanced users
Topic: how turn-on a rpi with a clock module?
Replies: 6
Views: 1262

Re: how turn-on a rpi with a clock module?

...your solution seems to be very simple!... I guess whether something is simple or complicated depends upon the capabilities of the individual. You don't need to be a Guru, but probably need to be a bit of a Fundi, and know your way around a soldering iron. A Picaxe is a special PIC produced mainl...
by SteveDee
Thu Mar 19, 2015 9:46 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Need to get 60mA and 5v from Raspberry
Replies: 3
Views: 683

Re: Need to get 60mA and 5v from Raspberry

Yes, 65mA is a lot less than many USB devices will draw, so should not be a problem.
by SteveDee
Thu Mar 19, 2015 9:12 pm
Forum: Automation, sensing and robotics
Topic: Off-Net Temperature Graphing
Replies: 13
Views: 4128

Re: Off-Net Temperature Graphing

...I have a '1 wire thermometer' setup with 3 thermometers logging data from different rooms in my house back to the pi. Currently the output is just taking a reading every 5mins and entering this into a CSV ... Do you want to write some code to do this? I have a similar setup (3 x DS18B20 to a csv...
by SteveDee
Wed Mar 18, 2015 11:30 am
Forum: General discussion
Topic: cmd line txt
Replies: 4
Views: 1527

Re: cmd line txt

ShiftPlusOne wrote:...Nope...
Oooops!
by SteveDee
Wed Mar 18, 2015 9:47 am
Forum: Troubleshooting
Topic: PIR output always high
Replies: 4
Views: 2196

Re: PIR output always high

...I am getting pin 4 as always high. Is there any way I can trouble shoot this?.... I haven't used this particular model of PIR, but I understand that HIGH means it is detecting (...or broken). Can we assume you have covered the sensor with something (e.g. a piece of card) so that it can't see you...
by SteveDee
Tue Mar 17, 2015 10:14 pm
Forum: Other programming languages
Topic: Reading GPIO status doesnt work within PHP if statement?
Replies: 1
Views: 2441

Re: Reading GPIO status doesnt work within PHP if statement?

...Would anyone know what I can do to read the GPIO within the if statement? You probably know infinitely more about PHP than me. But as no one has replied to you post... I thought the syntax for exec returns an array and an error status, so would suggest you try something like this:- exec ("gpio r...
by SteveDee
Tue Mar 17, 2015 9:28 pm
Forum: Advanced users
Topic: how turn-on a rpi with a clock module?
Replies: 6
Views: 1262

Re: how turn-on a rpi with a clock module?

...I am looking for a way to automatically turn on a raspberry at a specific time.... This would make an interesting electronics project. If you included a cheap programmable device like a Picaxe, you could program the device to read the time from an RTC and turn the power on to the Pi via a contro...
by SteveDee
Tue Mar 17, 2015 8:14 pm
Forum: General discussion
Topic: cmd line txt
Replies: 4
Views: 1527

Re: cmd line txt

raspberry_dylan wrote:... if you have any extra info on cmdline.txt that would be really neet!
There is quite a bit of info on the wiki: http://elinux.org/RPiconfig

Are you saying your Pi no longer boots?
by SteveDee
Tue Mar 17, 2015 6:39 pm
Forum: General discussion
Topic: Power for RPi Dashcam
Replies: 8
Views: 1093

Re: Power for RPi Dashcam

you will need to add stuff so it will close down on power loss properly... I agree for this type of application. You want the dashcam to power up when the ignition is turned on, so it starts to record 40 or 50 seconds later (after the Pi has booted). Then the dashcam should stop recording when the ...
by SteveDee
Tue Mar 17, 2015 6:30 pm
Forum: General discussion
Topic: Power for RPi Dashcam
Replies: 8
Views: 1093

Re: Power for RPi Dashcam

...Just set up a small proto board using a 7805 power regulator with some connectors, 12 volt in, and 5V at 1.5A out... As the 7805 is a 1Amp linear regulator it may require a heatsink, as power dissipation for this component will be something like:- (14V - 5V) x 0.3A = 2.7Watts This is assuming th...
by SteveDee
Sun Mar 15, 2015 10:50 pm
Forum: Automation, sensing and robotics
Topic: RFID reader and 5 V protection query
Replies: 5
Views: 1433

Re: RFID reader and 5 V protection query

...Am I right in assuming that this means that I cannot connect the RFID reader directly to the Rx GPIO pin without some sort of protection device / circuit between the pi and the RFID reader?... The Raspberry Pi GPIO is powered from 3.3Volts. However, this does not mean that GPIO pins configured a...
by SteveDee
Sun Mar 15, 2015 8:32 am
Forum: Raspbian
Topic: Shutdown from X Session
Replies: 2
Views: 585

Re: Shutdown from X Session

jwhitmore wrote:... and removed sudo permission from the default user 'pi'....
I think you need to go back and edit /etc/sudoers and try adding something like:-

Code: Select all

pi ALL=NOPASSWD: /sbin/shutdown
It's an interesting question, so I may give it a try this evening...time permitting.
by SteveDee
Fri Mar 13, 2015 9:40 pm
Forum: Automation, sensing and robotics
Topic: When you need more power - how to be safe?
Replies: 17
Views: 3075

Re: When you need more power - how to be safe?

..."How do you mount or enclose something like this to ensure it's safe?" The 240v connections seem to be exposed, or occasionally covered with a flip-down piece of plastic.... ...I'm surely not the only person flummoxed on how to safely use such a thing around the house. This is an instrument powe...
by SteveDee
Fri Mar 13, 2015 3:07 pm
Forum: General discussion
Topic: The Future of the Pi A series
Replies: 65
Views: 9432

Re: The Future of the Pi A series

...the Pi2 will definitely use more power than the B+ if you do that. ;) Time permitting, I may give that a try. One point is that if one Pi consumes 10% more current than another, but gets the job done in half the time, it will consume less power. So I'm looking for a heavy-weight application (or ...

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