Go to advanced search

by fruit-uk
Tue May 24, 2016 12:27 pm
Forum: Python
Topic: Spurious Readings - Help Requested
Replies: 52
Views: 6515

Worth a try anyway:)

Sorry, I don't do python but seems to me that you need to store time value of pulse in a variable and check difference as a new pulse arrives.
You could use a delay loop but that's not very efficient
by fruit-uk
Tue May 24, 2016 9:01 am
Forum: Python
Topic: Spurious Readings - Help Requested
Replies: 52
Views: 6515

Is your sensor being triggered by sunlight or reflected sunlight?
I have a similar setup using a TAOS device stuck to a meter with tac but light seems to get in through the meter display panel and casues occasional spurious triggers. One day I'll box it all in to keep it in the dark :)
by fruit-uk
Tue May 24, 2016 5:32 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: 1-wire Temperature Inaccuracy
Replies: 9
Views: 1568

Calibrated, certified DS1820s are available but expect they may be significantly more expensive than non-calibrated. Any DS1820 can be calibrated in water or water/ice if placed in the finger of a latex glove though I am not sure if latex will stand boiling water. Some time has to allowed for temper...
by fruit-uk
Mon May 23, 2016 1:35 pm
Forum: General discussion
Topic: Retractable stick
Replies: 5
Views: 1673

Linear servo?
by fruit-uk
Wed May 18, 2016 8:56 am
Forum: Automation, sensing and robotics
Topic: Facing some problem in a small home automation project
Replies: 5
Views: 1109

I'm quite happy with panStamps http://panstamp.com/ for remote sensors :)
by fruit-uk
Fri May 13, 2016 10:59 am
Forum: Automation, sensing and robotics
Topic: Home security/automation advice
Replies: 7
Views: 1721

I'm running fhem here http://fhem.de
I have eq3 MAX sensors for window opening, HomeEasy/Byron socket adaptors for lights when not at home.

You could look at panStamps or mysensors also for remotes sensors/activators
by fruit-uk
Tue May 10, 2016 5:45 pm
Forum: General discussion
Topic: recommendations wanted 15-19" good but cheap display for Pi3
Replies: 5
Views: 2590

There are many 15" or 17" displays available in UK charity shops for around £10, usually VGA or DVI but no problem with an adapter.
by fruit-uk
Mon May 09, 2016 8:02 pm
Forum: General discussion
Topic: PCB Standoff
Replies: 7
Views: 2802

I know you said you cannot use screws but what about drilling through one of the self adhesive pads, countersinking the back then using a nylon countersunk set screw and spacers - which are available in smaller diameters
by fruit-uk
Mon May 09, 2016 5:59 pm
Forum: General discussion
Topic: PCB Standoff
Replies: 7
Views: 2802

Burngate wrote:At least with the paper catalogue you could riffle through to the right page in 30 seconds - with the internet, it takes that long to get to the first wrong page, repeat for each of the next 30 wrong pages, then give up.
Me too!
by fruit-uk
Mon May 09, 2016 6:45 am
Forum: General discussion
Topic: Raspberry pi security camera cost
Replies: 24
Views: 10246

Only you can decide that.
You can of course do a lot of other things with a Pi based system as well
by fruit-uk
Mon May 09, 2016 5:44 am
Forum: General discussion
Topic: Raspberry pi security camera cost
Replies: 24
Views: 10246

Do you want a ready made system or do you want to learn?
Your post mentions both
by fruit-uk
Mon May 09, 2016 5:32 am
Forum: General discussion
Topic: temperature sensor for water heater
Replies: 4
Views: 1151

1-wire may work over that distance, difficult to be sure without trying and 30m of cable just to test may yield disappointing results. Take a look at the Dallas 1-wire docs for spec etc. as well as much other online. An alternative may be to set up a wireless node, with a DS1820 or something else. I...
by fruit-uk
Mon May 02, 2016 7:56 pm
Forum: Camera board
Topic: Solution planned for the bad lenses of the V2 8MP RasPi cam?
Replies: 47
Views: 19798

Re: Solution planned for the bad lenses of the V2 8MP RasPi

I'd like to know if there is a solution planned and how it will look like. In another thread it was stated on Saturday that discussions are being held. You may not be aware but today is a Bank Holiday in the UK and a holiday in other parts of Europe so there may not be many people actually at work ...
by fruit-uk
Fri Apr 29, 2016 5:38 am
Forum: General discussion
Topic: Adobe
Replies: 3
Views: 688

Re: Adobe

Heater wrote:Drerer,
Its not compatible, and it makes me moody.
In the mean time it fills us with joy that the closed source, single vendor, proprietary FLASH plug in is finally going he way of the dodo.
Especially given its record WRT security vulnerabilities
by fruit-uk
Sun Apr 24, 2016 8:27 pm
Forum: General discussion
Topic: List of all apps for Raspbian?
Replies: 4
Views: 5672

aptitude for a console based application
by fruit-uk
Sat Apr 16, 2016 5:26 am
Forum: General discussion
Topic: raspi-config time wrong?
Replies: 4
Views: 1135

by fruit-uk
Fri Apr 15, 2016 5:44 am
Forum: Raspbian
Topic: Raspbian Jessie find command
Replies: 11
Views: 3098

I have had a vaguely similar problem running locate, with a message that database is 8 days old.
sudo updatedb would hang.
A reinstall of locate and mlocate seems to have cured it

This is on a jessie upgraded wheezy system so not the light version.
by fruit-uk
Tue Apr 12, 2016 3:43 pm
Forum: Automation, sensing and robotics
Topic: Temperature humidity sensor DSTH01
Replies: 24
Views: 4398

I have several Si7021 around the house - running on panStamps though.
They have been very reliable so far
by fruit-uk
Tue Apr 12, 2016 2:39 pm
Forum: General discussion
Topic: Format SD Card
Replies: 5
Views: 1540

TTom wrote:And all the time it says card is read only, any clue?
Almost certainly dead/fake. Some will report as read only in that state
by fruit-uk
Tue Apr 12, 2016 9:54 am
Forum: Beginners
Topic: Beginner needing help choosing which electronics pack to get
Replies: 5
Views: 934

Some of the sensor kits advertised forArduinos may be useful - but be aware that many are designed for 5V, Pi GPIOs are 3.3V max, so take precautions.
There will be many suggestions online for connecting these to Pis - but make sure you check a few to make sure they are workable!
by fruit-uk
Tue Apr 12, 2016 8:28 am
Forum: General discussion
Topic: filesystem write files - after reboot the old data is back
Replies: 34
Views: 7700

Re: need tool for detect read-only SD card

Francois117 wrote:Any bright ideas to test this in order to report back that the SD disk is damaged?
Add a USB stick, copy writes to that and compare with SD
by fruit-uk
Tue Apr 12, 2016 7:51 am
Forum: General discussion
Topic: filesystem write files - after reboot the old data is back
Replies: 34
Views: 7700

Re: filesystem write files - after reboot the old data is ba

ghans wrote:I've heard that SD cards can permanently switch into
read-only mode if they detect massive internal damage.
I have had that happen with USB sticks. It is said that some manufacturers do this to protect your data.:)
A search for sandisk readonly may show some hits
by fruit-uk
Tue Apr 12, 2016 7:34 am
Forum: General discussion
Topic: filesystem write files - after reboot the old data is back
Replies: 34
Views: 7700

Re: filesystem write files - after reboot the old data is ba

Your photo doesn't really say much. It is very easy for a manufacturer of fakes to copy and print someone else's style and logo I use the cheapest cards I can find - but I will usually buy them from High Street stores I happen to pass through as I believe there is less chance of buying a fake - and ...
by fruit-uk
Tue Apr 12, 2016 7:27 am
Forum: General discussion
Topic: My ideal setup
Replies: 16
Views: 2313

Re: My ideal setup

If I were going to use a computer for VOIP I'd probably set up a dedicated Pi with asterisk.
As it is I have a hardware system that combines VOIP and landline and also have the option of VOIP SIM for my mobile - but I have come to hate phones for their constant interruptions.
by fruit-uk
Tue Apr 12, 2016 6:22 am
Forum: Automation, sensing and robotics
Topic: any feedback mechanism for relay control?
Replies: 1
Views: 416

Re: any feedback mechanism for relay control?

Many such systems do not provide any feedback at all as you say.
Homematic devices, as an example, at least provide an ack that the signal has been received - but that won't tell you if a light bulb has failed.
For that you will need a separate sensor.

Go to advanced search