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by davenull
Sat Oct 31, 2015 10:05 am
Forum: Deutsch
Topic: preiswerte Raspi-kompatible kabellose QWERTZ Tastatur+Maus ?
Replies: 32
Views: 4629

Re: preiswerte Raspi-kompatible kabellose QWERTZ Tastatur+Ma

danke!

wer hat welche in diesem Preisbereich genau schon selber per Raspi in Gebrauch?
by davenull
Sat Oct 31, 2015 9:50 am
Forum: Off topic discussion
Topic: Why is the search function so broken here?
Replies: 14
Views: 2100

Re: Why is the search function so broken here?

nothing, but nevertheless I would prefer to have a better working phpbb-integrated forum's search in our own phpbb3 forum we also use the integrated forum's search, and there is no rejecting of keywords, e.g. like "keyboard" (or, in German, even of: "Tastatur") http://www.mindstormsforum.de/search.p...
by davenull
Sat Oct 31, 2015 9:23 am
Forum: C/C++
Topic: Having Fun with threads! Very Interesting
Replies: 19
Views: 6909

Re: Having Fun with threads! Very Interesting

JFYI: about the distribution of prime numbers in N (the Natural Numbers): the distribution function normally is written as π(x) and π(x) is nearly equally-distributed over N just like x/log(x) which is almost linear (~800:6000 or later on ~9000:100000) with some irregular prime gaps though. So you'r...
by davenull
Sat Oct 31, 2015 9:03 am
Forum: Off topic discussion
Topic: Why is the search function so broken here?
Replies: 14
Views: 2100

Re: Why is the search function so broken here?

is it not possible to just drop keywords from sort of a "excluding-keyword-list" to be considered as "too common" ?
by davenull
Sat Oct 31, 2015 8:58 am
Forum: C/C++
Topic: C/C++ crosscompiler on a Windows PC ?
Replies: 33
Views: 6491

Re: C/C++ crosscompiler on a Windows PC ?

sorry, I don't understand: additionally to pthread, wiringPi and pigpio I have to #include (and dynamically link) also openvg and shapes_plus libs (partially by passing absolute path names) which is done by the following compiler/build setting: g++ -Wall -I/opt/vc/include -I/opt/vc/include/interface...
by davenull
Sat Oct 31, 2015 8:54 am
Forum: Deutsch
Topic: preiswerte Raspi-kompatible kabellose QWERTZ Tastatur+Maus ?
Replies: 32
Views: 4629

Re: preiswerte Raspi-kompatible kabellose QWERTZ Tastatur+Ma

30EUR wäre für mich in der Tat schon sehr teuer, das habe ich für meinen kompletten Raspi B+ bezahlt.
10-15 EUR wäre etwa mein Preisrahmen.
by davenull
Sat Oct 31, 2015 8:35 am
Forum: Automation, sensing and robotics
Topic: wanted: robotics multi-IO shield, 8 motors, lot of IOs
Replies: 24
Views: 2026

Re: wanted: robotics multi-IO shield, 8 motors, lot of IOs

IMO 3 things have to be resolved for your system to get shortlisted: a) your libs must be absolutely wiringPi and pigpio-compatible when linked all together - you'll probably have to fix that unconditionally ! b) real-time capable encoder readings implemented by a Timer interrupt on hardware level (...
by davenull
Sat Oct 31, 2015 8:24 am
Forum: Automation, sensing and robotics
Topic: wanted: robotics multi-IO shield, 8 motors, lot of IOs
Replies: 24
Views: 2026

Re: wanted: robotics multi-IO shield, 8 motors, lot of IOs

no,no, the Lego motors are a simple DC motors with simple standard Qab rotaray outputs. for 8 rotary encoders it would be the best way to have a timer-IRQ at each 100µs to trigger then both the pin-reading and the encoder-maths. That's the way I'm doing it on my Arduinos (MEGA: 100-250µs by a AVR Ti...
by davenull
Fri Oct 30, 2015 7:05 pm
Forum: C/C++
Topic: C/C++ crosscompiler on a Windows PC ?
Replies: 33
Views: 6491

Re: C/C++ crosscompiler on a Windows PC ?

no solution out-of-the-box yet for a Windows-to-Raspi-cross compiler ?
That's weird, IMO, that no one else should have needed such a thing so far...except me... :-/
by davenull
Fri Oct 30, 2015 7:02 pm
Forum: General discussion
Topic: Raspberry pi newbie
Replies: 6
Views: 1009

Re: Raspberry pi newbie

if you understand German, I wrote a simple quick guide for the very first steps to C on Raspi...
(or maybe Google translate would help...):

http://www.mindstormsforum.de/viewtopic ... 689#p67768
by davenull
Fri Oct 30, 2015 6:29 pm
Forum: Deutsch
Topic: preiswerte Raspi-kompatible kabellose QWERTZ Tastatur+Maus ?
Replies: 32
Views: 4629

Re: preiswerte Raspi-kompatible kabellose QWERTZ Tastatur+Ma

gibt es eine Hardware-Kompatibilitätsliste für solche HIDs?
Wie ich mein Glück kenne, kaufe ich promt eins, das NICHT funktioniert... :-/
by davenull
Fri Oct 30, 2015 6:25 pm
Forum: Automation, sensing and robotics
Topic: wanted: robotics multi-IO shield, 8 motors, lot of IOs
Replies: 24
Views: 2026

Re: wanted: robotics multi-IO shield, 8 motors, lot of IOs

I don't have the Rover of either release and so don't know how quick it's encoder values may change, the encoders I am using are rotating by up to 1-2°/ms, == 2-4 encoder ticks/ms. FYI, I'm using most of all Lego Mindstorms encoder motors (EV3 medium/large, and NXT). http://www.mindstormsforum.de/vi...
by davenull
Fri Oct 30, 2015 6:22 pm
Forum: Automation, sensing and robotics
Topic: wanted: robotics multi-IO shield, 8 motors, lot of IOs
Replies: 24
Views: 2026

Re: wanted: robotics multi-IO shield, 8 motors, lot of IOs

ah, ok, I just knew tis one, roughly: Duty is not charged if: the FOB value, i.e. the value of the goods excluding shipping and insurance cost, does not exceed €150 VAT is not charged if: the FOB value, i.e. the value of the goods excluding shipping and insurance cost, does not exceed €22
by davenull
Fri Oct 30, 2015 4:57 pm
Forum: Automation, sensing and robotics
Topic: wanted: robotics multi-IO shield, 8 motors, lot of IOs
Replies: 24
Views: 2026

Re: wanted: robotics multi-IO shield, 8 motors, lot of IOs

ok, I would choose then 1st of all just 1 RoboPi, assembled. For motor H bridges, I'm always using 3 pin L293/L298 comaptible ones, plus 2 encoder pins. As I'm a complete newbee to Raspberry ( just started with it 3 weeks ago): can you show me example source code for Raspbian g++: - which extra lib ...
by davenull
Fri Oct 30, 2015 4:32 pm
Forum: Automation, sensing and robotics
Topic: wanted: robotics multi-IO shield, 8 motors, lot of IOs
Replies: 24
Views: 2026

Re: wanted: robotics multi-IO shield, 8 motors, lot of IOs

pps,
forgot to mention:
As I don't solder, I needed everything completely assembled.

and ppps,
wouldn't be the RoboPi better then?
by davenull
Fri Oct 30, 2015 4:26 pm
Forum: Automation, sensing and robotics
Topic: wanted: robotics multi-IO shield, 8 motors, lot of IOs
Replies: 24
Views: 2026

Re: wanted: robotics multi-IO shield, 8 motors, lot of IOs

below EUR 20 (including shipping) it's free of customs and VAT, below (IIRC) ~EUR 120 (including shipping) it's free of customs but plus 19% VAT, higher than ~EUR 120 (including shipping) it's plus 20% customs plus 19% VAT, so the cheaper, the cheaper, in this case ;) ps, but maybe you'd wish to con...
by davenull
Fri Oct 30, 2015 4:14 pm
Forum: Automation, sensing and robotics
Topic: wanted: robotics multi-IO shield, 8 motors, lot of IOs
Replies: 24
Views: 2026

Re: wanted: robotics multi-IO shield, 8 motors, lot of IOs

that looks and sounds amazing, just the shipping fees and the customs, plus the VAT... :? do you have a distributor in Germany or Europe/EU (common market) ? if you don't have one: would you wish to choose e.g., Watterott? (no, I don't get commission... :roll: ) http://www.watterott.com/index.php?pa...
by davenull
Fri Oct 30, 2015 3:51 pm
Forum: General discussion
Topic: Overclocking
Replies: 4
Views: 690

Re: Overclocking

(+1)
(y)
by davenull
Fri Oct 30, 2015 3:40 pm
Forum: General discussion
Topic: Overclocking
Replies: 4
Views: 690

Re: Overclocking

I would be curious about how quick this overclocked Raspi would perform in a speed / benchmark test, even compared to a not-overclocked one. these are my results for a B+ at 800 MHz compiled via Geany IDE, Geany settings for compile: g++ -Wall -I/opt/vc/include -I/opt/vc/include/interface/vmcs_host/...
by davenull
Fri Oct 30, 2015 3:15 pm
Forum: Off topic discussion
Topic: Why is the search function so broken here?
Replies: 14
Views: 2100

Re: Why is the search function so broken here?

agree, effing annoying... :evil:
by davenull
Fri Oct 30, 2015 3:08 pm
Forum: Automation, sensing and robotics
Topic: Seeking Developer for a paid for project
Replies: 6
Views: 893

Re: Seeking Developer for a paid for project

must it be compulsorily Raspberry-based? Switching LEDs and react to buttons sounds as if it's a perfect task for 1 Arduino Mega or Due... 8-)
by davenull
Fri Oct 30, 2015 2:25 pm
Forum: C/C++
Topic: C/C++ crosscompiler on a Windows PC ?
Replies: 33
Views: 6491

Re: C/C++ crosscompiler on a Windows PC ?

that actually does not sound as if it was a walk in the park, regrettably... :roll:
by davenull
Fri Oct 30, 2015 2:06 pm
Forum: Deutsch
Topic: preiswerte Raspi-kompatible kabellose QWERTZ Tastatur+Maus ?
Replies: 32
Views: 4629

preiswerte Raspi-kompatible kabellose QWERTZ Tastatur+Maus ?

hallo, werden die meisten gängigen kabellosen QWERTZ Tastatur-Maus-Kombinationen alle vom Raspbian Linux (Jessie) erkannt? welche preiswerte Raspi-kompatible kabellose Tastatur + Maus Kombination ist zu empfehlen? Noch nutze ich keine Kabellosen für meinen PC, daher kann ich keine einfach mal blind ...
by davenull
Fri Oct 30, 2015 12:27 pm
Forum: C/C++
Topic: C/C++ crosscompiler on a Windows PC ?
Replies: 33
Views: 6491

Re: C/C++ crosscompiler on a Windows PC ?

thanks, now I understand how this would work in principle! As I have several additional libs to be included, where do I put them on my PC? e.g., my current make command is Geany (Raspi) settings for make: g++ -Wall -I/opt/vc/include -I/opt/vc/include/interface/vmcs_host/linux -I/opt/vc/include/inter...
by davenull
Fri Oct 30, 2015 11:00 am
Forum: C/C++
Topic: C Libraries for Adafruit servo HAT?
Replies: 9
Views: 1832

Re: C Libraries for Adafruit servo HAT?

IMO that's really a pity that all those HATs don't provide a convenient C lib but just support Python.
As I only use g++ and never will use Python, the company will probably never win me to become a customer for all those HATs...

Not a reasonable company policy IMO, though...

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