Go to advanced search

by RaspISteve
Mon May 01, 2017 2:40 pm
Forum: Camera board
Topic: Streaming mjpg from Raspberry Cam
Replies: 223
Views: 187594

Re: Streaming mjpg from Raspberry Cam

Jose, I've been fiddling with the Streaming Mjp source with an aim to remote my Mead ETX125 telescope. I've just found that the clever people have updated the Github source about 20 days ago so will need to get a new image and start over. Suggest other folk flying this one do the same. However, havi...
by RaspISteve
Sat Mar 25, 2017 9:28 pm
Forum: General discussion
Topic: Raspberry Pi Web Guys: A Suggestion
Replies: 3
Views: 553

Re: Raspberry Pi Web Guys: A Suggestion

Try switching to the prosilver theme for the forum. It has the breadcrumbs you need. https://www.raspberrypi.org/forums/ucp.php?i=174 bottom of that page. Woow! Thanks but no thanks. It just froze my brain. Maybe being declared Dyslexic a while back having failed an expensive normality test and may...
by RaspISteve
Sat Mar 25, 2017 8:57 pm
Forum: General discussion
Topic: Raspberry Pi Web Guys: A Suggestion
Replies: 3
Views: 553

Raspberry Pi Web Guys: A Suggestion

Guys, It's been bugging me for years: Could you please add a "Return to Board index" button at the top of a thread reply page. It also occurs that getting stuffed back to the very top of the forum isn't the best place to be sent to. Having scanned down for new topic(s) I then click on the "Read them...
by RaspISteve
Sat Mar 25, 2017 8:36 pm
Forum: General discussion
Topic: Raspberry boards based on x86 SOC
Replies: 72
Views: 16823

Re: Raspberry boards based on x86 SOC

<snip> it would be better if Raspberry boards are based on x86 SOC even if it costs a little more it will provide more Operating System options. Nah! At risk of putting my head above the parapet: The 8086 architecture is a bit of a dog and largely compromised by its links dating back to the 8080 an...
by RaspISteve
Sun Mar 19, 2017 6:14 pm
Forum: Automation, sensing and robotics
Topic: Weird results from ultrasonic sensor
Replies: 3
Views: 708

Re: Weird results from ultrasonic sensor

Ruffydd, Could still be the USB supply. If you have a couple of micro farad capacitor as a DC blocker and some earphones you could monitor/listen to the Arduino's power rails. If you've got an oscilloscope use that. If glitches are a problem you should hear the ticks. The capacitor is to block the D...
by RaspISteve
Sun Mar 19, 2017 5:22 pm
Forum: Media centres
Topic: Been Very Happy With OSMC Until They Made It "BETTER!!"
Replies: 2
Views: 919

Re: Been Very Happy With OSMC Until They Made It "BETTER!!"

Dougie, You'll probably get a better reaction if you post your stuff on https://discourse.osmc.tv/ Yeah! Thanks for the link. I did a search but you need to know the right question first. Local knowledge is always best. Simply, it worked and then it didn't so something got broken across the "IMPROVE...
by RaspISteve
Sun Mar 19, 2017 2:09 am
Forum: Media centres
Topic: Been Very Happy With OSMC Until They Made It "BETTER!!"
Replies: 2
Views: 919

Been Very Happy With OSMC Until They Made It "BETTER!!"

Guys, I'm having problems with OSMC after it updated itself. Last time I used it, and this is only to select and play my CD collection without having to go open a single CD case, every thing was good. This was about a fortnight ago. Since the update (and they made it BETTER) : 1. I can't use my TV r...
by RaspISteve
Sat Mar 18, 2017 1:13 am
Forum: Automation, sensing and robotics
Topic: Weird results from ultrasonic sensor
Replies: 3
Views: 708

Re: Weird results from ultrasonic sensor

Where is the Arduino getting its power from? Maybe the PC can supply more current than the Pi and you are getting 'brown outs' causing duff readings. Can you (or are you) running the Arduino off an independent supply? Maybe you could reduce the problem by including a large(r) reservoir capacitor on ...
by RaspISteve
Fri Mar 17, 2017 10:43 pm
Forum: Advanced users
Topic: Unable to SSH into Pi 3 over Wifi
Replies: 8
Views: 2787

Re: Unable to SSH into Pi 3 over Wifi

Guys, I had a problem trying to SSH between my various Pi units. WiFi to/from a ethernet wired unit was no problem. However, it was a dead duck trying to go between two units both on the same WiFi. Seems most (ALL??) WiFi routers don't/won't route WiFi to/from WiFi. Some clever fellow here helped me...
by RaspISteve
Wed Jan 11, 2017 7:06 pm
Forum: C/C++
Topic: C: The Ten Commandments
Replies: 0
Views: 562

C: The Ten Commandments

Guys, The following link points at something I found very useful in years gone past. Thought I'd share it: https://www.lysator.liu.se/c/ten-commandments.html I would also add a supplementary: "If your program looks like it works first time its likely that its not working as you expected. Better to n...
by RaspISteve
Tue Jan 03, 2017 8:06 pm
Forum: General discussion
Topic: Direct telescope control of Meade RA & Dec drives
Replies: 9
Views: 4003

Re: Direct telescope control of Meade RA & Dec drives

Roy, I've got a Pi controlling my Meade ETX125 driven via WiFi from Stellarium. The serial port connection from the Pi is buffered via an RS232 level shifter board and connects to the handset using the Meade serial cable. The eventual aim is to have the PiCam look down the scope and export the video...
by RaspISteve
Sat Dec 24, 2016 1:46 am
Forum: Other projects
Topic: Build your own CPU out of transistors
Replies: 10
Views: 3026

Re: Build your own CPU out of transistors

Tony, You might want to start building the basic blocks like AND, OR and XOR gates out of transistors/diodes then move on to NAND, NOR simple flip-flops. Then look at JK flip-lops and on to simple registers. By this time you would have used up an enormous number of components but only brushed agains...
by RaspISteve
Wed Dec 21, 2016 11:27 pm
Forum: C/C++
Topic: New wiringPi released
Replies: 11
Views: 2655

Re: New wiringPi released

Is there s simple way to close WiringPi or would a reboot be required. Eh? WiringPi is a C/C++ library that gets linked into your program. There's no runtime component. Is there s simple way to close WiringPi or would a reboot be required. Everything is closed when your program exits. There is no n...
by RaspISteve
Tue Dec 20, 2016 10:40 pm
Forum: C/C++
Topic: New wiringPi released
Replies: 11
Views: 2655

Re: New wiringPi released

Perhaps a question for Gordon, Sir, started using your WiringPi a year or so back then got distracted. A question I did ask at the time was about what to do when I've done with my WiringPi related application. My question at the time was about any issues on leaving WiringPi running, certainly with i...
by RaspISteve
Mon Dec 19, 2016 10:20 pm
Forum: Automation, sensing and robotics
Topic: accurate rotation of a motor
Replies: 6
Views: 3019

Re: accurate rotation of a motor

What I should have added above was that my outline above would suite a simple power transistor/MOSFET for the PWM drive system with perhaps a protection diode across the motor. This would keep the parts count and costs to a minimum.
by RaspISteve
Sat Dec 17, 2016 7:10 pm
Forum: Automation, sensing and robotics
Topic: accurate rotation of a motor
Replies: 6
Views: 3019

Re: accurate rotation of a motor

Would suggest you explore using a PWM driven motor, not a stepper motor, to get your movement. You might also consider a simple gear box to reduce the speed and increase the torque to meet your application. A five pole brush motor would be better than a 3pole motor. Don't even think about brushless ...
by RaspISteve
Tue Dec 13, 2016 10:45 pm
Forum: General discussion
Topic: Raspberry Pi EMC Compliance
Replies: 21
Views: 10433

Re: Raspberry Pi EMC Compliance

Guys, I've had what might be inferred as an EMC issue with my Pi3. Connected to my big 42" TV. I was toggling between the PI and watching TV. Generally no problems with the mainstream TV channels but I ended up watching the BBC HD News channel. Again all OK with the Pi until I fired up the desktop a...
by RaspISteve
Mon Dec 12, 2016 6:02 pm
Forum: General discussion
Topic: flightware.com
Replies: 5
Views: 1233

Re: flightware.com

Guys, I've got the FlightAware tracking application going on a spare PI plus attached SDR (software defined radio) dongle. It's been going non-stop since March16 and it's an interesting "wot's going on" addition to my general browsing using either my Win7, Ubuntu or Android machines. I get an neat m...
by RaspISteve
Thu Dec 08, 2016 8:44 pm
Forum: Automation, sensing and robotics
Topic: Solenoid wiring (did I do it right?)
Replies: 15
Views: 3531

Re: Solenoid wiring (did I do it right?)

==,
Have you tried setting the MOSFET gate to high/low (3.3/0v) manually to confirm the next level of operation?

Similarly, a simple LED on the driver's input to confirm you've got the GPIO enabled/setup correctly.
by RaspISteve
Thu Dec 08, 2016 8:26 pm
Forum: Beginners
Topic: As gift for 12 year old?
Replies: 24
Views: 5800

Re: As gift for 12 year old?

Guys, I've purchased a Pi3B kit complete with case (don't forget a case), keyboard, mouse and PSU (UK & Euro plug) for my nephew so, being a single box, it's a whole lot easier to wrap. Think he's eleven and since he was five wanted to be an inventor. He's actually half Austrian meaning he always wa...
by RaspISteve
Sun Nov 13, 2016 7:27 pm
Forum: Automation, sensing and robotics
Topic: Sensing 120VAC presence with RPi
Replies: 11
Views: 2330

Re: Sensing 120VAC presence with RPi

What about a simple neon type indicator across the 120vac and a photo diode or LDR looking at the neon and attached to a spare PIO.
by RaspISteve
Sat Sep 17, 2016 7:44 pm
Forum: Beginners
Topic: Can I download RetroPi through the Raspberry pi?
Replies: 2
Views: 493

Re: Can I download RetroPi through the Raspberry pi?

Yes. Well I, in my infinite ignorance managed it. Try: https://github.com/retropie/retropie-setup/wiki/manual-installation My first attempt was by downloading the SD image. Then I followed the detail I found after a short search to install RetroPie onto a new-ish Pi3/8 Gigbyte SD installation. I can...
by RaspISteve
Mon Sep 05, 2016 8:31 pm
Forum: Troubleshooting
Topic: Ping Blind Spot Between two IP Address [SOLVED]
Replies: 3
Views: 639

Re: Ping Blind Spot Between two IP Address

wh7qq , brilliant! Think you've got it in one. Thank you. I found another wireless PI and can't get to that either. Nor can I raise my moby or TV also in wifi. My router is a "Thomson TG585 v8". I've just given the thing a once over and I'm stuffed if I can find an option to either allow routing bet...
by RaspISteve
Mon Sep 05, 2016 2:37 pm
Forum: Troubleshooting
Topic: Ping Blind Spot Between two IP Address [SOLVED]
Replies: 3
Views: 639

Ping Blind Spot Between two IP Address [SOLVED]

Guys, I have a P3B and Ubuntu laptop and one or other (or both) seem to be sulking and won't talk to each other. Specifically I can neither ping nor ssh between them. Both use DHCP are wireless connected all both are on my LAN for all other purposes. Both display the same ping error message where th...
by RaspISteve
Fri Dec 04, 2015 8:21 pm
Forum: Automation, sensing and robotics
Topic: Terminating WiringPI
Replies: 5
Views: 1140

Re: Terminating WiringPI

Guys, I understand the roll-back of GPIOs, that's easy, but looking for suggestions on doing this with the interrupt functions. Where do they go when you're not there? Segmentation fault on the next unexpected event? Not ideal. <SPECULATION> The only action that might be useful is to re-call the int...

Go to advanced search