Awards

bonjour à tous ! voilà, je souhaite ajouter sur mon arduino une carte d'extension i/o : le pcf8575. avant de rentrer dans des considérations de code et autres, j'ai essayé de comprendre la datasheet que propose texas instruments et il y quelque chose que je ne comprends pas : comment définit-on que tel port va être une input et que tel autre port va être une output ? moi, de ce que je comprends, quand on décide de passer en mode lecture, on lit forcément tous les ports de la carte (p00 à p17). et quand on se met en mode écriture, on écrit forcément sur tous les ports de la carte également. il y donc pour moi un conflit. soit ils sont tous en input, soit ils sont tous en output ! supposons que je veuille que mon port p00 soit une input pour un capteur x. supposons également que je souhaite que mon port p01 soit une output. comme faut-il procéder pour le "dire" que p00 est input et p01 output ? ce que je veux dire c'est que, après avoir envoyé mes bits d...

i want write serial data arduino text file , trying entering following command in terminal window:  cat /dev/cu.usbmodem1421 >> test1.txt  unfortunately not work. when ignore file description , input following command:  cat /dev/cu.usbmodem1421 the data can displayed on terminal cannot saved. there wrong command? way referenced following link type command: http://montessorimuddle.org/2014/07/26/datalogging-with-the-arduino/ i use 'realterm' save txt data arduino. . Arduino Forum > Using Arduino > Programming Questions > Save data to txt file in Terminal arduino

i mistakingly uninstalled frontpage component joomla 1.0.12. there way important component without reinstalling joomla? thanks neil hello , welcome joomla! you try unzipping joomla install package, manually uploading (installing) components/com_frontpage , administrator/components/com_frontpage - see if works - sean *edited second directory - left out administrator Board index Joomla! Older Version Support Joomla! 1.0 Installation - 1.0.x

hi, i'm new photoshop please gentle...i have photoshop cs2 ver. 9.0.2 running in windows xp. a friend has asked me if them favor, convert photograph jpeg image looks drawn hand in pencil or ink. there out there patience walk me through steps make reality? thanks, b3ob [the 3 silent] just google x , "photoshop tutorial" there's many choose from. pick 1 shows pleasing results. More discussions in Photoshop Windows (read only) adobe

hello,   know whether possible use pin 0 (rx) / pin 1 (tx) on atmega328p chipset (pro mini arduino board 16mhz / 5v) regular digital input ports @ same time.   problem following : since run out of available ports on arduino board, use port 0 , port 1 connect 2 push buttons.   issue these 2 ports used tx/rx serial ports usb link upload sketchs / print on console debugging.   when connect board pc update sketch , debug it, push buttons don't work port "seen" on.   imagine once sketch has been validated , don't need usb link longer, upload final sketch tx / rx ports input , push button work...   concern : if that, stuck afterwards when want use usb connection again? (tx not responding , impossible communicate chipset?)   thanks again support. you're misunderstanding here, i'm not sure you're unclear on. you should able put push button on pins on uno no problem. use open button , have connect gro...

g'day, i'm quite confused how opengl works on rpi (rpi2 in case), i'm hoping more knowledgeable offer insight. i've built , configured custom qt5 package on eglfs-based raspbian lite image (no x environment). pyqt5 application works nicely part, including use of qopenglwidgets, believe use hardware-accelerated rendering opposed rastered qwidget brothers. i'm trying implement real-time plotting of data stream. i've tried blitting matplotlib, standard plotting pyqtgraph. both raster-based , cause gui lock up, , can offer <1hz refresh rate. weeks of research, discussions on forums , mailing lists, i've come conclusion vispy solution. vispy offers opengl hardware-accelerated plotting, should provide required refresh rates real-time plotting on rpi. issue i'm having vispy can't find opengl libraries. similarly, can't run glxgears (error: couldn't open display (null)). assumption opengl es 2.0 configured qt5 installation sufficient, i'...

hola, soy algo nuevo con esto de arduino, y resulta que tengo un proyecto escolar, en el que necesito que determinadas horas del día ejecute un código que ya tengo programado y las demás horas no haga nada; cuento con un arduino uno y el rtc ds1307 espero que alguien fuera tan amable de ayudarme, los lapsos de tiempo son los siguientes: de lunes a  sábado: ** de 07:00 10:00 ---> ejecute código ** de 10:30 13:30 ---> ejecute código ** de 14:00 17:00 ---> ejecute código ** de 17:30 22:00 ---> ejecute código domingos: no hacer nada. pd: no es necesario que se impriman todas las horas, minutos y segundos, solo con que se imprima la hora en que se vaya ejecutar el código es suficiente. les agradezco su atención, saludos!  Arduino Forum > International > Español > Software (Moderators: surbyte, Hector_A) >...