Connectique. (informatique, vidéo, audio, téléphonie, autoradio, caravane, palm, automate,VOYAGES, divers ..............) ICI: les plus courants sur PC (<- cliquer) Le port série (DB9) Le port série (DB25) Le câble null-modem série Le port parallèle (DB25 ou port imprimante) Le connecteur de l'imprimante (Centronics) Le câble null-modem parallèle Le bus USB Le bus Firewire (IEEE1394) Le port VGA (le moniteur du PC) * voir plus bas Le port Joystick (manette de jeu) Le port clavier (DIN5) Le port PS/2 (ou MiniDin6, pour claviers et souris) Le modem Le connecteur réseau (RJ45) le mini USB: USB type C VGA=Video Graphics Adapter ou Video Graphics Array.
VESA=Video Electronics Standards Association. DDC=Display Data Channel. Il existe deux types de prise : Les sorties DVI des cartes graphiques sont des DVI-I. Permet d’avoir deux sorties DVI même sur des cartes de petite taille DVI was developed by the Digital Display Working Group (DDWG). DDC = Display Data Channel. . Norme 2005 (version 1.2). Drawdio! How does it work? The Drawdio kit is pretty simple compared to most electronic projects. We will go through it one section at a time, please refer to the schematic Power supply The first part to understand is the power supply, which keeps everything running.
The power source is a single AAA battery which is held in a plastic container that is soldered to the PCB. The Oscillator The heart of the kit is a TLC551 chip, which is a low voltage version of the famous LM555 timer chip. One of the more popular ways that '555s are used is as a 'astable multivibrator' which is another way of saying an oscillator. This system is pretty much identical to Japanese water fountains, as this video shows: Except its all with electrons instead of water molecules and capacitor C1 is the 'bucket'. F = 1.44 /(C3 * (RA + 2 * RB)) C3 = 680 pF = 0.00000000068 FRA = 10000 ohmsRB = 300000 ohm to 1000000 ohm (1 Mohm) Amplifier. Tutorials, Electronics made EASY, Williamson Labs. 555 Timer/Oscillator Tutorial.
I nside the 555 timer, at fig. 3, are the equivalent of over 20 transistors, 15 resistors, and 2 diodes, depending of the manufacturer. The equivalent circuit, in block diagram, providing the functions of control, triggering, level sensing or comparison, discharge, and power output. Some of the more attractive features of the 555 timer are: Supply voltage between 4.5 and 18 volt, supply current 3 to 6 mA, and a Rise/Fall time of 100 nSec. It can also withstand quite a bit of abuse. The Threshold current determine the maximum value of Ra + Rb.
For 15 volt operation the maximum total resistance for R (Ra +Rb) is 20 Mega-ohm. The supply current, when the output is 'high', is typically 1 milli-amp (mA) or less. All IC timers rely upon an external capacitor to determine the off-on time intervals of the output pulses. Assume further that the applied voltage is 6 volts. Fig. 4-1, Change in the input pulse frequency allows completion of the timing cycle. Definition of Pin Functions: