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by gordon77
Sat Dec 16, 2017 12:34 pm
Forum: Camera board
Topic: RaspberryPi Camera for Astrophotography
Replies: 338
Views: 71845

Re: RaspberryPi Camera for Astrophotography

M31, 12 x 3mins, processed in Paint Shop Pro. Sony A6000, Canon 400mm 5.6 guided on NEQ6 by PiAG.
(Looks noisy on here due to resizing)..
by gordon77
Fri Dec 15, 2017 4:19 pm
Forum: Add-ons
Topic: The Pi as a GPS jammer
Replies: 3
Views: 757

Re: The Pi as a GPS jammer

afaik gps operates around 1.6Ghz maybe you are producing harmonics at that.

I find my usb gps won't work directly plugged into the pi if there is a weak signal, so l use a usb extension lead.
by gordon77
Wed Dec 13, 2017 8:06 am
Forum: Beginners
Topic: 1MOhms
Replies: 10
Views: 355

Re: 1MOhms

by gordon77
Tue Dec 12, 2017 8:36 pm
Forum: Beginners
Topic: 1MOhms
Replies: 10
Views: 355

Re: 1MOhms

I'm using this : http://www.hager.co.uk/product-catalogue/energy-distribution/modular-devices/relays-contactors/contactors/erc225/43591.htm?Suchbegriffe=erc from English hager website . I'm using exactly ERC425 (4 contacts), but same at this ERC225 (2 contacts) It's basically a relais with a comman...
by gordon77
Tue Dec 12, 2017 3:59 pm
Forum: Camera board
Topic: RaspberryPi Camera for Astrophotography
Replies: 338
Views: 71845

Re: RaspberryPi Camera for Astrophotography

Nice idea but a peltier is a bit more practical for me for experimenting :D
by gordon77
Tue Dec 12, 2017 1:58 pm
Forum: Camera board
Topic: RaspberryPi Camera for Astrophotography
Replies: 338
Views: 71845

Re: RaspberryPi Camera for Astrophotography

The cooled pi camera...
by gordon77
Tue Dec 12, 2017 9:49 am
Forum: Camera board
Topic: RaspberryPi Camera for Astrophotography
Replies: 338
Views: 71845

Re: RaspberryPi Camera for Astrophotography

I've been experimenting with cooling the Pi camera to reduce the noise, so far looks promising...

Graph shows how the values change as the camera cools, GREEN 64-84 to BLUE 56-64 with less noise.
I am not sure why the centre value reduces (brightness) with temperature.
by gordon77
Mon Dec 11, 2017 5:53 pm
Forum: General discussion
Topic: Autoremoval of /dev/video0 causing problem to re-open application
Replies: 1
Views: 78

Re: Autoremoval of /dev/video0 causing problem to re-open application

I don't know the answer but have seen similar with a logitech webcam, it didn't use to happen but don't know when it started.
by gordon77
Wed Dec 06, 2017 3:49 pm
Forum: General discussion
Topic: Raspberry Camera Module V2 : 3D SCANNER
Replies: 1
Views: 101

Re: Raspberry Camera Module V2 : 3D SCANNER

The field of views are in degs so should make no difference how far you are from the camera.
by gordon77
Tue Dec 05, 2017 5:01 pm
Forum: Astro Pi
Topic: PiCamera as Luminosity Sensor?
Replies: 7
Views: 295

Re: PiCamera as Luminosity Sensor?

Not sure exactly what you need but you get some ideas from my auto-guider python script. https://github.com/Gordon999/Pi-AutoGuider Ignore the auto-guider parts, but is does allow you to set the pi camera and show a graph of luminance of a star, you can also filter as R, G, or B. Maybe give you some...
by gordon77
Mon Dec 04, 2017 4:35 pm
Forum: Troubleshooting
Topic: SD trouble
Replies: 7
Views: 243

Re: SD trouble

Can you put it in a digital camera and format it, or just write raspbian to it?
by gordon77
Sun Dec 03, 2017 7:39 pm
Forum: Camera board
Topic: RaspberryPi Camera for Astrophotography
Replies: 338
Views: 71845

Re: RaspberryPi Camera for Astrophotography

I think you need something like this...

http://www.rothervalleyoptics.co.uk/cel ... r-125.html

And 2 pi cameras
by gordon77
Sat Dec 02, 2017 11:10 am
Forum: Troubleshooting
Topic: GPIO not going all the way LOW [solved]
Replies: 17
Views: 643

Re: GPIO not going all the way LOW

"Your layout appears to send GPIO pin 16 to pin 2 of the chip, which is correct for the DQS package, but not for the PW package.
Could that be your problem?"

I am confused by the design as the DQS package shows pin 5 as Vcca when it appears to come from the GPIO pin 11.
by gordon77
Fri Dec 01, 2017 7:13 pm
Forum: Troubleshooting
Topic: GPIO not going all the way LOW [solved]
Replies: 17
Views: 643

Re: GPIO not going all the way LOW

It would be good to see a schematic of that part of the design.

Why is pin 1 of the chip wired to pin 10?
by gordon77
Thu Nov 30, 2017 8:47 pm
Forum: Beginners
Topic: Screen capture
Replies: 2
Views: 122

Re: Screen capture

by gordon77
Wed Nov 29, 2017 8:43 am
Forum: General discussion
Topic: Video overlay with GPS data
Replies: 2
Views: 138

Re: Video overlay with GPS data

Try picamera and annotate_text, here's an example...

viewtopic.php?f=41&t=111605&hilit=Car+c ... 25#p778276
by gordon77
Tue Nov 28, 2017 1:47 pm
Forum: Troubleshooting
Topic: PIR motion sensor with Solenoid
Replies: 11
Views: 284

Re: PIR motion sensor with Solenoid

Have you tried reducing the 1k resistor for a bit more force?
by gordon77
Tue Nov 28, 2017 11:35 am
Forum: Python
Topic: (solved) lnstalling pygame in python 3.6.3 ?
Replies: 3
Views: 239

Re: installing pygame in python 3.6.3 ?

this seemed to work http://www.philjeffes.co.uk/wordpress/?p=259 just changed the python3 to python3.6
by gordon77
Mon Nov 27, 2017 8:31 pm
Forum: Troubleshooting
Topic: PIR motion sensor with Solenoid
Replies: 11
Views: 284

Re: PIR motion sensor with Solenoid

There's a diagram here... https://electronics.stackexchange.com/q ... spberry-pi

I've never tried it.
by gordon77
Mon Nov 27, 2017 12:18 pm
Forum: Python
Topic: (solved) lnstalling pygame in python 3.6.3 ?
Replies: 3
Views: 239

Re: installing pygame in python 3.6.3 ?

I have tried apt-get install python3-pygame as well.

pygame works in the pre-installed 2.7 and 3.5 but not in the newly installed 3.6.3.

Do l need to be in any particular directory when l try to install it?
by gordon77
Mon Nov 27, 2017 11:03 am
Forum: Python
Topic: (solved) lnstalling pygame in python 3.6.3 ?
Replies: 3
Views: 239

(solved) lnstalling pygame in python 3.6.3 ?

I have installed python 3.6.3 but can't find how to install pygame. If I try apt-get install python-pygame it says already installed but it isn't found when I run python3.6.3 I used these instructions to install 3.6.3, replacing the 3.6.0 with 3.6.3 which appeared to work OK. https://gist.github.com...

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