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by mister_wavey
Tue Sep 25, 2012 12:26 pm
Forum: HATs and other add-ons
Topic: Gertboard Assembly Thread
Replies: 162
Views: 22685

Re: Gertboard Assembly Thread

pulling the wires fixed it. Just putting them back to check the commandline version works too.
by mister_wavey
Tue Sep 25, 2012 12:21 pm
Forum: HATs and other add-ons
Topic: Gertboard Assembly Thread
Replies: 162
Views: 22685

Re: Gertboard Assembly Thread

ah! nice. thx G.
by mister_wavey
Tue Sep 25, 2012 11:53 am
Forum: HATs and other add-ons
Topic: Gertboard Assembly Thread
Replies: 162
Views: 22685

Re: Gertboard Assembly Thread

Not entirely sure what you mean. Using wiringPi's gpio program, I can simultaneously light LEDs 1-4 by connecting GP25-22 to B1-4 and jumpering U3-out-B1 to B4 (i.e. as documented in the manual.) But when using the ATmega approach, I *can* light any LED using PB3 alone, but I *can't* light any LED f...
by mister_wavey
Mon Sep 24, 2012 11:04 pm
Forum: HATs and other add-ons
Topic: Gertboard Assembly Thread
Replies: 162
Views: 22685

Re: Gertboard Assembly Thread

Hi - new query: I widened the blink arduino sketch to include the first 4 LEDs, driven from PB5-PB2 and noticed that LED3 from PB3 wasn't lighting (actually it was just barely flickering). I checked the connections and all looked OK. Swapping cables to instead use PB5 to drive LED3 made it light up ...
by mister_wavey
Mon Sep 24, 2012 7:19 pm
Forum: HATs and other add-ons
Topic: Gertboard Assembly Thread
Replies: 162
Views: 22685

Re: Gertboard Assembly Thread

Burngate wrote: you had 8v able to keep it running, but not start it, while 9v will start it as well.
Stiction is higher than friction, often by quite a lot.
aha - thanks for the explanation - makes so much sense, not sure why I didn't see that for myself...

thx again!
by mister_wavey
Mon Sep 24, 2012 5:37 pm
Forum: HATs and other add-ons
Topic: Gertboard Assembly Thread
Replies: 162
Views: 22685

Re: Gertboard Assembly Thread

Sure, but the 9v battery will run it fine standalone...
by mister_wavey
Mon Sep 24, 2012 4:54 pm
Forum: HATs and other add-ons
Topic: Gertboard Assembly Thread
Replies: 162
Views: 22685

Re: Gertboard Assembly Thread

well, how weird. If I give the motor spindle a helping hand at the start, the gertboard keeps it spinning fine. If I don't give it a help at the start, it just sits there. Rubbish motor?
by mister_wavey
Mon Sep 24, 2012 3:20 pm
Forum: Troubleshooting
Topic: pwc driver
Replies: 32
Views: 10701

Re: pwc driver

I have same problem: philips toucam 740K works on x86 linux (3.2.0 kernel) but not on rasbian (3.2.27+)
by mister_wavey
Mon Sep 24, 2012 2:01 pm
Forum: HATs and other add-ons
Topic: Gertboard Assembly Thread
Replies: 162
Views: 22685

Re: Gertboard Assembly Thread

OK, turns out I was measuring previously without the powersource (9v battery) connected. Ahem. Now when I measure motA and motB with either Gordon's gpio or the motor test program, I get good voltages across them. However, neither situation will drive my motors. If I connect them *directly* to 9v ba...
by mister_wavey
Mon Sep 24, 2012 12:31 pm
Forum: HATs and other add-ons
Topic: Gertboard Assembly Thread
Replies: 162
Views: 22685

Re: Gertboard Assembly Thread

hmm, thx - no different.

With the multimeter, should I be able to register a connection across each of the surface mounted C11, C13 and C12? I can across C11, but not across either of C13 or C12.
by mister_wavey
Mon Sep 24, 2012 12:01 pm
Forum: HATs and other add-ons
Topic: Gertboard Assembly Thread
Replies: 162
Views: 22685

Re: Gertboard Assembly Thread

The motor controller specification says minimum 12V but I have had no problems with 9V. I've tried a second motor (both spin happily with 9V across them) but on the gertboard I can't get more than a flicker of life out of them. I measured 0.0V across the MOTA and MOTB outputs before the motor test ...
by mister_wavey
Mon Sep 24, 2012 9:31 am
Forum: Raspbian
Topic: Updating to the 2012-09-18-wheezy-raspbian image
Replies: 228
Views: 206819

Re: Updating to the 2012-09-18-wheezy-raspbian image

the static address for wlan0 config above worked perfectly for me - thx!
by mister_wavey
Sun Sep 23, 2012 6:55 pm
Forum: Raspbian
Topic: Updating to the 2012-09-18-wheezy-raspbian image
Replies: 228
Views: 206819

Re: Updating to the 2012-09-18-wheezy-raspbian image

I had this too with python2. I downloaded and installed the RPi.GPIO package manually to fix it. http://pypi.python.org/pypi/RPi.GPIO/#downloads if you want to do the same.
by mister_wavey
Sat Sep 22, 2012 11:16 pm
Forum: HATs and other add-ons
Topic: Gertboard Assembly Thread
Replies: 162
Views: 22685

Re: Gertboard Assembly Thread

OK, I went over each solder joint on the underside again and now I have perfect LEDs and even more exciting, a perfect AVR blink! Thanks Gert! Thanks Gordon! Thanks Tandy! PS arduino will fail to upload if you leave the jumpers on the IO buffers. Gordon mentions this in his writeup. It caught me out...
by mister_wavey
Sat Sep 22, 2012 8:16 pm
Forum: Troubleshooting
Topic: My brand new Pi won't boot - at all
Replies: 15
Views: 2090

Re: My brand new Pi won't boot - at all

I've imaged successfully from a macbook several times. I'd try a different card if you have access to one.
by mister_wavey
Sat Sep 22, 2012 8:06 pm
Forum: HATs and other add-ons
Topic: Gertboard Assembly Thread
Replies: 162
Views: 22685

Re: Gertboard Assembly Thread

I assembled mine today, but I've got some problems. I had a successful 3.33v on the post-assembly test, but I can't get LED 1 or 3 to light. I'll go back over my (pretty rubbish) soldering and try and remelt each connection to see if I can fix it. I tried to make sure the LEDs were inserted correctl...
by mister_wavey
Sat Sep 22, 2012 7:55 am
Forum: HATs and other add-ons
Topic: Gertboard shipping date.
Replies: 279
Views: 33578

Re: Gertboard shipping date.

wow, ordered from tandy on 20th, with 3-4 day shipping, and it arrived on 22nd!
by mister_wavey
Fri Sep 21, 2012 6:45 pm
Forum: HATs and other add-ons
Topic: Gertboard Assembly Thread
Replies: 162
Views: 22685

Re: Gertboard Assembly Thread

they were impressively straight. Could one use bluetack or equivalent to hold them in place while soldering?
by mister_wavey
Thu Sep 20, 2012 2:03 pm
Forum: Other projects
Topic: Morse Code LED sender to phototransistor receiver
Replies: 0
Views: 540

Morse Code LED sender to phototransistor receiver

Hi, I wrote up a fun little inter-pi communications project here: http://waveypi.blogspot.co.uk/2012/09/2 ... morse.html
by mister_wavey
Wed Sep 19, 2012 7:44 pm
Forum: Raspbian
Topic: Updating to the 2012-09-18-wheezy-raspbian image
Replies: 228
Views: 206819

Re: Updating to the 2012-09-18-wheezy-raspbian image

try

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq

again. if it doesn't work, your kernel probably isn't in cpufreq mode properly. run the raspi-config again and select the overclock settings again.
by mister_wavey
Wed Sep 19, 2012 2:23 pm
Forum: General discussion
Topic: Mounting holes
Replies: 6
Views: 1678

Re: Mounting holes

I bought a modmypi case in early sept 2012 and my rev1 board fits like a glove. I wonder if they changed something?
by mister_wavey
Wed Sep 19, 2012 8:54 am
Forum: Beginners
Topic: Starting with Java / Fortran
Replies: 6
Views: 2035

Re: Starting with Java / Fortran

Holy moly, I think you'd be well advised to avoid Eclipse on the Pi for your first encounter with java. Eclipse has its strengths, but it is a massive resource hog on even the best hardware. You can get an awfully long way with geany or other editors to learn the basics of java syntax and just use c...
by mister_wavey
Tue Sep 18, 2012 10:19 am
Forum: Bare metal, Assembly language
Topic: Stuck at OK01...
Replies: 14
Views: 4786

Re: Stuck at OK01...

if you haven't already, you need to create a 'source' directory and put your main.s in there. Be careful with the case of 'source'.
by mister_wavey
Fri Sep 14, 2012 8:03 pm
Forum: Other projects
Topic: Using more than one Pi on one Screen
Replies: 10
Views: 2518

Re: Using more than one Pi on one Screen

I'm using it like that right now. It works fine from the mouse/keyboard attached to the pi, or from a remote vnc viewer. Both can control the input. It's just pretty slow. But not unusable, by any means.

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