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by sparkyhall
Sun Jul 23, 2017 3:08 pm
Forum: Camera board
Topic: Remove red in daylight Pi noIR camera image
Replies: 3
Views: 2966

Re: Remove red in daylight Pi noIR camera image

It is unlikely that you will be able to correct the image with software. Wildlife cameras have an IR filter that gets placed in front of the camera for daylight images and removed for night time, you can normally hear the filter move by either covering the sensor or moving the camera from light to d...
by sparkyhall
Thu Jul 20, 2017 4:19 pm
Forum: General discussion
Topic: Bricked my Pi. don't know why
Replies: 121
Views: 15087

Re: Bricked my Pi. don't know why

I have several of these dc-dc convertors and the output voltage is not stable. In my case I needed to step down from 24V to 5V for a Pi3, before connecting the Pi I set the output voltage with a dummy load resistor of 8Ω while observing the output with an oscilloscope. This revealed that the output ...
by sparkyhall
Mon Jul 17, 2017 7:34 am
Forum: Troubleshooting
Topic: How can I configure sshd to automatically start?
Replies: 5
Views: 1091

Re: How can I configure sshd to automatically start?

Why not enable sshd using 'sudo raspi-config' like you are supposed too?
by sparkyhall
Mon Jul 17, 2017 7:02 am
Forum: Weather station
Topic: Connecting wind and rain sensors (build your own station)
Replies: 190
Views: 86450

Re: Connecting wind and rain sensors (build your own station

I put my build instructions on git:

https://github.com/sparkyhall/DIY-Raspb ... er-Station

I built mine over a year ago and it is still working and yes it uses the official weather station software.
by sparkyhall
Fri Jul 14, 2017 7:33 am
Forum: General discussion
Topic: People detection
Replies: 3
Views: 2000

Re: People detection

You may be able to use the Pi camera motions vectors like PiKrellCam does to detect motion:

http://billw2.github.io/pikrellcam/pikrellcam.html
by sparkyhall
Tue Jul 04, 2017 9:17 pm
Forum: Weather station
Topic: Connecting wind and rain sensors (build your own station)
Replies: 190
Views: 86450

Re: Connecting wind and rain sensors (build your own station

I'm glad you've got it going.

Chris
by sparkyhall
Mon Jul 03, 2017 7:35 pm
Forum: Weather station
Topic: Connecting wind and rain sensors (build your own station)
Replies: 190
Views: 86450

Re: Connecting wind and rain sensors (build your own station

Hi Ron, The only other thing I can think of is to check that pin 29 of your weather board makes contact with pin 29 on the Pi. I would do this by plugging the weather board on the pi and checking for continuity between the junction of R8/C6 on the weather board and pin 29 on the under side of the pi...
by sparkyhall
Sun Jul 02, 2017 1:13 pm
Forum: Weather station
Topic: Connecting wind and rain sensors (build your own station)
Replies: 190
Views: 86450

Re: Connecting wind and rain sensors (build your own station

Hi ronnsx, With the weather board unplugged can you measure the resistance between pin 29 and the anemometer signal screw terminal, it should measure approx. 1000 Ohms. It is also worth checking for shorts circuits around pin29 by measuring the resistance between pin 29 & 30 and pin 29 & 27, these s...
by sparkyhall
Sun Jul 02, 2017 7:21 am
Forum: Weather station
Topic: Connecting wind and rain sensors (build your own station)
Replies: 190
Views: 86450

Re: Connecting wind and rain sensors (build your own station

My problem is everything works except the anemometer. I checked my build, all seems fine, resistance readings on pins 29/31within the range specified in the build document, confirmed 3.3v on the screw terminals for rain and wind and confirmed the wind sensor works by logging it into the rain socket...
by sparkyhall
Sun Jun 04, 2017 7:18 am
Forum: General discussion
Topic: Raspberry Pi power cut torture test using a MoPower UPS
Replies: 30
Views: 7241

Re: Raspberry Pi power cut torture test using a MoPower UPS

All interesting stuff. Towards the end of last year I tried to corrupt one of my SD cards by simply killing the mains power on a daily basis, I did this for several weeks without any issues. It was enough to convince me not to worry even though I have seen corruption on an early Pi with power loss. ...
by sparkyhall
Sat May 27, 2017 7:39 am
Forum: General discussion
Topic: Setting up a Pi 3 for the long haul?
Replies: 44
Views: 9537

Re: Setting up a Pi 3 for the long haul?

I have often wondered how much truth there is in stories of limited life for SD cards. If you remember the PC SSD drives had the same stories and generally that is now considered nonsense. I currently have the following systems running 24/7 and so far I have not had a single SD card failure: 1) Two ...
by sparkyhall
Sat Apr 01, 2017 4:37 pm
Forum: General discussion
Topic: Soldered USB dongle won't work without cable connected
Replies: 5
Views: 1822

Re: Soldered USB dongle won't work without cable connected

Actually it's not at all weird. There is a lot more to connecting high speed data lines than just connecting them with a piece of copper wire, look up transmission line theory. The connecting cable has to have the correct characteristic impedance otherwise you get signal reflections due to impedance...
by sparkyhall
Thu Mar 16, 2017 8:54 pm
Forum: General discussion
Topic: One large 5 volt supply?
Replies: 26
Views: 4728

Re: One large 5 volt supply?

You need to think very carefully about potential fault conditions before doing something like this. If, for example, you connect 10 PiZero to a 5V@20A PSU, a fault such as a short circuit in a connected USB device may well cause a fire due to severely overloaded cables and PCB tracks. Clearly using ...
by sparkyhall
Sat Jan 28, 2017 10:42 pm
Forum: General discussion
Topic: Power issue on PI3
Replies: 10
Views: 2225

Re: Power issue on PI3

The meanwell 5V 5A PSU you linked to in your first post has a small voltage adjuster next to the two pin output connector (labeled SVR1 in datasheet), according to the datasheet this allows you to adjust the output voltage between 4.75V and 5.5V. Ideally you want to set the output to 5.1V with a mul...
by sparkyhall
Fri Dec 23, 2016 10:01 am
Forum: Weather station
Topic: Weather Station Components
Replies: 21
Views: 7823

Re: Weather Station Components

You can find details of how to connect the sensors in this thread: https://www.raspberrypi.org/forums/viewtopic.php?f=112&t=142570 I also put some of my build info, including a schematic on github: https://github.com/sparkyhall/DIY-Raspberry-Pi-Weather-Station My home build has been running without ...
by sparkyhall
Thu Nov 17, 2016 12:57 pm
Forum: General discussion
Topic: Stepper Motors and the L293D
Replies: 12
Views: 3566

Re: Stepper Motors and the L293D

If it is not a sofware issue then it may be an electrical noise issue. Here are a few initial thoughts: -The L293D is a 5V logic device so if you are driving directly from the Pi GPIO you will have reduced noise immunity. -Have you kept the L293D 5V logic supply seperate from the motor supply? -Have...
by sparkyhall
Tue Nov 08, 2016 7:15 pm
Forum: Weather station
Topic: Ambient Temperature +5 degrees
Replies: 33
Views: 6123

Re: Ambient Temperature +5 degrees

Does Figaro TGS2600 include heater? Most of gas sensor need to heat up before you can get reliable readings. If so ... that is why only ds1820b give reliable readings. Yes the TGS2600 does include a heater and I suggested this may be the problem back in post 9 of this thread: https://www.raspberryp...
by sparkyhall
Sat Nov 05, 2016 10:21 pm
Forum: General discussion
Topic: rpi3 resistor help
Replies: 19
Views: 3060

Re: rpi3 resistor help

I just measured R31 as zero Ohm on my Pi3.
by sparkyhall
Sat Nov 05, 2016 8:58 am
Forum: Weather station
Topic: Ambient Temperature +5 degrees
Replies: 33
Views: 6123

Re: Ambient Temperature +5 degrees

DS18B20 is most accurate. In those two other temp sensors are only used to correct main purpose readings. While this may be true the HTU21 is supposed to be within 0.4 degrees over 5 to 60C so this doesn't account for the errors people are seeing here. On my home build version of the weather statio...
by sparkyhall
Sun Oct 30, 2016 1:05 pm
Forum: General discussion
Topic: Uninstalling programs?
Replies: 9
Views: 2541

Re: Uninstalling programs?

I think when the OP says he installed windows Iot he means "Windows IoT" which has nothing to do with linux. I'm afraid I have no idea how that installs though.
by sparkyhall
Sun Oct 30, 2016 9:00 am
Forum: General discussion
Topic: Putting Up A Web Page: "Web Server"?
Replies: 31
Views: 5178

Re: Putting Up A Web Page: "Web Server"?

As others have said you do not need to install Apache.

I have recently started using "cherypy" for one of my python projects and it works very well. I did install a more recent version of cherrypy through pip rather than use the one available through apt-get.
by sparkyhall
Mon Oct 17, 2016 6:21 pm
Forum: General discussion
Topic: SSH and Jessie Lite?
Replies: 3
Views: 1617

Re: SSH and Jessie Lite?

I installed Jessie Lite only last night and ssh was already enabled.

What model Pi do have and how are you connecting, wi-fi or ethernet?
by sparkyhall
Thu Oct 13, 2016 6:18 pm
Forum: Weather station
Topic: Connecting wind and rain sensors (build your own station)
Replies: 190
Views: 86450

Re: Connecting wind and rain sensors (build your own station

Yes you can connect different sensors to the same data and clock pins with I2C, although the clock speed will be limited to the slowest device. You do have to make sure that each sensor has a unique address though. Some have a single pre-programmed address, some have one or more pins that you can ti...
by sparkyhall
Mon Aug 15, 2016 7:35 pm
Forum: General discussion
Topic: Expander Board.
Replies: 3
Views: 713

Re: Expander Board.

by sparkyhall
Mon Aug 08, 2016 9:25 pm
Forum: General discussion
Topic: Need someone battery knowledge
Replies: 2
Views: 678

Re: Need someone battery knowledge

It is not possible to confirm with the information provided, assuming you plan to connect the TFT interface board directly to the battery. I say this because the TFT interface board doesn't give a input voltage tolerance, it simply states 12V@1000mA input. The battery output voltage range is 10.8V -...

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