Arduino uno power?

Question

Arduino

I decided to buy an Arduino and I want to know their power
1) How much do the Arduino models differ in power?
1) What is the most difficult project you can do with Uno?
2) Will Uno have enough power for such a device: GPRS + RFID reader + monitor + keyboard 4 by 4?

Answer 1

1. practically not how much. MK is mostly 328th. The classic is UNO, because shields so beloved by everyone are famously stuck into it.
2. what is the measure of complexity? it will not handle video processing. But the management of, say, a machine tool is quite real.
3. you need to count the pins. 8 on the keyboard, something like 4-5 on RFID, "monitor", I dare to hope for i2c, GPRS should generally communicate through the serial port. Maybe enough.
the most voracious, it turns out, the keyboard. you can hang it on a separate micro, and in UNO give the key code.

Answer 2

What is meant by power?
Input/output load? - 40mA
Number of outputs / inputs? - different from the controller
Clock frequency? Generator at 16000kHz
Description of controllers
Arduino is a development environment for Atmel controllers.
Take any Atmel controller, make a harness, connect via usb converter and flash via Arduino .

Answer 3

I think that the "smart home" system is expected to function 24/7 and the ability to change the system settings through the web interface. A bit too much for a microcontroller with 32 KB of ROM and 2 KB of RAM.