I'm french and very newbie in electronic, so sorry for this basic question, but i'm willing to learn about this ! 8)
I'm gonna buy an Arduino Uno an some components such as Infrared sensors, leds, buttons and servo motors and LCD screen.
My question is, on arduino Uno, there is only one 5V pin to supply power to these components. How can I you do to have enough Pins ?
Do I have to connect all my components on the same 5V wire going to 5V pin ? Does this change the way to calculate resitors values ? Do I have to mount my components in parallel ?
Do I have to buy an extra card for supplying power to my components ?
That are a lot of questions, but Thanks in advance for your replies
Yes, you connect all the components to the same wire going into the 5V pin.
No, this doesn't change how you calculate anything. The same 5V goes to all the components, but the total current drawn from the 5V pin increases as you add more components.
If you add too many components so that it reaches the limit of the current the voltage regulator can provide, then the voltage might drop. Lights will dim, the board may get hot, etc. It takes a lot of components to do that though, so don't worry about it yet.
There are available from several sources 'breadboard' power supplies that will plug directly into a breadboard and extender shield/cable/breadboard devices that work VERY well for development purposes. I use both one to power my project and the other to "Cable" the Arduino directly to a breadboard... They work very very well for me as I can leave a breadboard that I am working on connected and when I switch to another project I just "Plug in" the wired breadboard... I don't need or use a lot of single jumpers to power an LCD, I just plug it into the breadboard and use short jumpers to the cable PCB header and also I never have to be concerned with the dissipation of the Arduino 5V source. Noise or current spikes are no longer an issue with that those two devices as the only common connection (the ground) carries only the signal current, not the load current. The whole thing added about $20 to the cost of my setup. Monet well spent... IMO
/* Edit later in the day
They are also pin jumperable for 5 or 3V3 operation, one I own will put out 5 on one side and 3V3 on the other side so one could have both sources on one breadboard
*/
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