Output 1 or 0

TTL logic gates are better at sinking current than sourcing current. What this means is that the output transistors of a TTL device work better when they connect a load to ground (0V) rather than to the +5V supply.

PIC microcontrollers are constructed of CMOS transistors as opposed to TTL transistor. CMOS circuits work equally well when connecting an output device to the high voltage side (+5V) as they do when connecting to the low voltage side. The advantage of an activehigh drive circuit is that it’s easier for a programmer to follow the logic that lights the LED. Making the PIC output 1, or a high voltage, turns the LED on. Making the output 0, or a low voltage, turns the LED off.

Debugging PIC

Unable to enter debug mode

For some processors, if Power Up Timer is enabled then this may unable to enter debug mode

For stable debugging, 4.7k resistors are needed from PGC/PGD to GND (on Pickkit 2 with red button, those resistors are already present)

Subversion

File sharing

http://codingly.com/2008/07/19/la-propriete-svnexternals-et-les-revisions/

Multitouch

Facebook

http://www.new.facebook.com/group.php?gid=21888432218

HowTo

http://www.multitouch.nl/?p=23
http://www.multitouch.nl/documents/multitouchdisplay_howto_070523_v02.pdf

Software

http://www.whitenoiseaudio.com/touchlib/

HIPER HMC-2K53A-A3 - Barebone Media Center avec écran VFD

http://www.ldlc.be/fiche/PB00072251.html

• 292,38 € TTC
• No processor, HDD nor CD/DVD/Blu-ray

VFD/LCD control for Ubuntu

http://lcdproc.org/index.php3

Calcul poutres/solives

Flèche



Avec :

f = flèche en m
p = charge unitaire en N/m
L = longueur entre appuis en m
E = module d'Young en N/m^2
I = moment d'inertie de la section de la poutre en m^4

http://pagesperso-orange.fr/philippe.fichou/Poutre/poutre7.htm
http://www.coinduprojeteur.com/beton/cours_rdm.html
http://www.mecatools.free.fr/mecatools.html
http://www.steelbizfrance.com/prog/formu.asp

Poutres porteuses
E acier=210000 MPa
Charges
poutrains/claveaux (180 kg/m2) + chappe (175 kg/m2) + surcharge (350 kg/m2)=705 kg/m2
Poutre 1
L=4.8m, p=705*3.8/2*9.81=13140.50 N/m,f=4.8/300=0.016 m

• I=27.0319 m4
• HEB
  

Poutre 2
L=4.8m, p=705*(3.8+4.8)/2*9.81=29739,02 N/m,f=4.8/300=0.016 m

• I=61.1774 m4

Poutre 3
L=3.8m, p=705*4.8/2*9.81=16598,52 N/m,f=3.8/300=0.01266 m

• I=16.9419 m4

Surces: http://www.daniel.fr/prod_sid2.php?f=poutrelles/heb-26.htm

Charges 120 (temporaires) + 120 (permanentes) kg/m²

Portées en mm	Entraxe 495 à 515 mm
4 000	75 x 225
4 500	75 x 250
5 000	100 x 250

http://www.bois.com/amenager/parquet-plancher/guide-achat-parquet/les-abaques-de-solivage

Calcul poutres acier

Type de poutre

HEB 200

http://www.groupdelrue.be/new/fr/default.htm

Poids: 62.5 kg/m

http://www.rocourt-metaux.be/fichesfers.htm

Poids: 62.5 kg/m
Charge maximale admissible uniformément répartie (Portée 5m): 10637 kg

Faire un circuit imprimé

Bien enlèver tous les résidus de flux de soudure avec par exemple de l'acétone et un brossage