Go to advanced search

by RaspISteve
Thu Jun 19, 2014 5:53 am
Forum: Troubleshooting
Topic: Help increasing rpm of stepper motor
Replies: 26
Views: 7686

Re: Help increasing rpm of stepper motor

If you attempt to step too fast you will leave the armature behind and it will stall so you have to ramp the speed up and down carefully else you will loose the position of the armature. Getting the right step motor driver is very important when you depart from the very simple applications. This for...
by RaspISteve
Wed Jun 18, 2014 10:58 pm
Forum: Troubleshooting
Topic: Help increasing rpm of stepper motor
Replies: 26
Views: 7686

Re: Help increasing rpm of stepper motor

Years ago I had a need to run a stepper fast and could only get there by ramping the speed up from slow. At full speed a simple tap on the shaft would stall the motor so I was running the thing too fast. It may be in your case the voltage on the coils doesn't reach the point where enough current can...
by RaspISteve
Sun May 11, 2014 12:16 pm
Forum: Troubleshooting
Topic: ssh with X forwarding on mac
Replies: 3
Views: 1417

Re: ssh with X forwarding on mac

If your problem is not getting an X11 window after connecting via "ssh -X ...." from your remote client try entering "etc/X11/Xsession" through the session to the Pi. I have to do this on my Ubuntu/Pi access. Connecting from Ubuntu X11 using ssh with -X only ever gets me a terminal on the Pi. Seems ...
by RaspISteve
Thu May 08, 2014 10:37 pm
Forum: Troubleshooting
Topic: Wifi - Hidden SSID - Open Network wont connect
Replies: 6
Views: 1242

Re: Wifi - Hidden SSID - Open Network wont connect

D, I went through this one a week or so back.<snip>. I only remember one chap getting stick over this. He was a self professed wireless network expert who didn't realise that hiding the SSID is pretty pointless. Fair point but... Like many I've forgotten how long I've had my Wifi. Back then it was ...
by RaspISteve
Thu May 08, 2014 9:57 pm
Forum: Troubleshooting
Topic: Wifi - Hidden SSID - Open Network wont connect
Replies: 6
Views: 1242

Re: Wifi - Hidden SSID - Open Network wont connect

D, I went through this one a week or so back. The default Pi-Wifi doesn't do hidden ssID. As you've noticed you don't get much sympathy here for being stuck with a hidden ssID, I guess for a lot of good reasons nowadays. However, there are still and will be hidden ssIDs out there and this question w...
by RaspISteve
Thu May 01, 2014 10:18 am
Forum: Troubleshooting
Topic: Help Setting up WiFi Hotspot using RTL8188CUS
Replies: 2
Views: 565

Re: Help Setting up WiFi Hotspot using RTL8188CUS

More of a guess than anything... If the Pi stops if the wired network connection is off it's likely that the Pi is expecting some response for whatever is 'normally' connected at the other end, maybe a DHCP ip server. You say your moby connection stops getting an IP. You say the Pi provides IP's to ...
by RaspISteve
Tue Apr 29, 2014 11:09 am
Forum: Troubleshooting
Topic: Wireless connection problem
Replies: 3
Views: 637

Re: Wireless connection problem

Steve, Yes, it's exactly as you described: i need to open a browser to input my username/password in the login page to use the wireless network. No, not quite. Right now i don't have a monitor which has HDMI input to connect with my Pi, so i use VNC to open up a GUI session. And i tried to use wpa_...
by RaspISteve
Mon Apr 28, 2014 9:42 pm
Forum: Troubleshooting
Topic: Wireless connection problem
Replies: 3
Views: 637

Re: Wireless connection problem

Test, Sounds like your school network uses both a secure wireless lan and user/password account to get out to the real internet. This sounds similar to hotels I've used where, once you've made the wireless connection, usually without a password, you then have to use a browser to attempt to get to th...
by RaspISteve
Mon Apr 28, 2014 10:08 am
Forum: Troubleshooting
Topic: XBMC Browser triggers a re-boot
Replies: 3
Views: 939

Re: XBMC Browser triggers a re-boot

On selecting the browser the TV screen shows a wide red-ish wide bar down the middle of the screen before clearing to list a short burst of lines of re-boot type text then clears again to show a centred text box that appears to be the browser reporting problems. Then, after a long time-out I get a c...
by RaspISteve
Mon Apr 28, 2014 9:09 am
Forum: Troubleshooting
Topic: XBMC Browser triggers a re-boot
Replies: 3
Views: 939

XBMC Browser triggers a re-boot

Guys, finally got around to XBMC and worked out most of what I needed to get it to work. It updated itself immediately so I assume its all OK in there. However, selecting the in-built browser triggers a re-boot, I guess via a crash. It seems to restart with the browser but BEFORE the wireless lan co...
by RaspISteve
Wed Apr 23, 2014 9:00 pm
Forum: Networking and servers
Topic: Motorcycle communication
Replies: 5
Views: 3553

Re: Motorcycle communication

Guys, I've been thinking along the lines of using Rpi-A to interface my Bluetooth headset to a PMR radio. I have a bike2bike at 1Km capable system that links to my navigator and on to my moby. The BT allows connection via two other channels to either pillion or 2nd/3rd bike. I know PMR systems aren'...
by RaspISteve
Wed Apr 16, 2014 12:40 pm
Forum: Beginners
Topic: WLAN Auto Restart?
Replies: 10
Views: 2340

Re: WLAN Auto Restart?

Not exactly what the problem is if you read the post. The MAC address filtering was being turned on and off, to disable a particular machine, and this interfered with the network connectivity of the Pi which was not filtered. MrEngman Agreed. However, I have always been a big fan of the law of unin...
by RaspISteve
Wed Apr 16, 2014 10:34 am
Forum: Beginners
Topic: WLAN Auto Restart?
Replies: 10
Views: 2340

Re: WLAN Auto Restart?

Guys, Coincidental I found myself chasing down a problem with my hidden ssID (see solution: "Is broadcasting SSID mandatory?" http://www.raspberrypi.org/forums/viewtopic.php?f=91&t=34173 ) last night. Answer "YES IT IS" using the out-of-the-box defaults. By default the PI wlan seems to need the ssID...
by RaspISteve
Wed Apr 16, 2014 2:50 am
Forum: Beginners
Topic: Is broadcasting SSID mandatory?
Replies: 22
Views: 17987

Re: Is broadcasting SSID mandatory?

Guys, A year on and another wild goose chase to resolve this one. Yes my ssID is 'hidden' and Yes adding the scan...=1 works but why can't the clever people take it as read that not everyone will have got the memo that hiding things isn't really all it used to be and include options that keep things...
by RaspISteve
Wed Apr 02, 2014 7:01 pm
Forum: General discussion
Topic: New Website
Replies: 94
Views: 36104

Re: New Website

Arrg! Whisky Tango Foxtrot

It's a nightmare and gives me a headache but then I'm only 62. Please go back to the proper front page.

Remember: If it ain't broke don't fix it.
Certainly don't just screw it because you can.
by RaspISteve
Thu Mar 27, 2014 11:00 pm
Forum: Troubleshooting
Topic: [SOLVED] Power Connection = Micro USB B
Replies: 1
Views: 558

[SOLVED] Power Connection = Micro USB B

Guys, Been wanting to hang an 'A' Model and camera off the back of my auto-pointing telescope and run the lot off a big lead acid battery pack using a cigarette lighter to USB adaptor + appropriate lead. I need a definitive type for the connector used for the RPI power input. The FAQ says "The devic...
by RaspISteve
Tue Jun 11, 2013 9:43 pm
Forum: Camera board
Topic: STICKY: Mechanical data
Replies: 30
Views: 63169

Re: Mechanical data

Guys, I know its a bit late now but from the drawing it would appear that the lens axis is just off line from the adjacent mounting holes. It would make lining this thing up with any supplemental lens system a whole lot easier had these holes been moved a bit or perhaps elongated. My point? once spe...
by RaspISteve
Wed Feb 06, 2013 10:18 pm
Forum: C/C++
Topic: Playing a .WAV file from a C / C++ program
Replies: 8
Views: 8557

Re: Playing a .WAV file from a C / C++ program

Guys, If the sound is generated by pulse width modulation (PWM) any click when opening or closing the driver it likely to come from the averaged output voltage generated PWM stream transitioning from either and initial all ZEROs or all ONEs to an alternating stream that approximates to a value mid w...
by RaspISteve
Sun Nov 18, 2012 1:12 am
Forum: C/C++
Topic: Blinking an LED with C
Replies: 11
Views: 28725

Re: Blinking an LED with C

Zach, It's been a while since I looked over the output circuits of the PiFace (I assume it's what you're using) but based on what I remember your LED won't light up whatever your program does or doesn't. The output driver, a ULN2803 uses open collector drivers. These things will pull an output down ...
by RaspISteve
Sun Nov 04, 2012 10:01 pm
Forum: Other programming languages
Topic: How to use a DC Motor with Raspberry PI
Replies: 1
Views: 2215

Re: How to use a DC Motor with Raspberry PI

Juan, Perhaps your first steps should be to re-post your request in the "Automation, sensing and robotics" threads. However, now we are here perhaps a few pointers: At its simplest level a simple relay to turn the DC motor on/off would be a start of a very long journey. With a bit of smarts you can ...
by RaspISteve
Thu Nov 01, 2012 2:20 pm
Forum: General discussion
Topic: URL Links Not Opening In New Window/Tab
Replies: 7
Views: 2593

Re: URL Links Not Opening In New Window/Tab

Yep. Please put me down for one of these (a new Tab whenever following an embedded URL).

My preference would be to avoid a new browser instance, I end up loosing track of them all, close the wrong one and end up back at an empty screen having totally lost the thread.
by RaspISteve
Wed Oct 31, 2012 10:43 pm
Forum: General discussion
Topic: GNURadio on Raspberry Pi
Replies: 11
Views: 12469

Re: GNURadio on Raspberry Pi

A long shot but have you looked at http://www.fftw.org/
by RaspISteve
Wed Oct 24, 2012 9:44 pm
Forum: General discussion
Topic: STICKY: Introduce yourself!
Replies: 3565
Views: 129665

Re: Introduce yourself!

Just signed up on the off chance of hitting a show stopper with the little guy. Given the excellent source of stuff here (THANKS guys) and around I've worked out most everything thus far. First met Unix years ago then Linux at/around release 1.3.? when a 25MHz 386 and 4Mb of RAM was fairly hot. Thos...

Go to advanced search