This is the new Arduino Uno R3.
In addition to all the features of the previous board, the Uno now uses an
ATmega16U2 instead of the 8U2 found on the Uno (or the FTDI found on previous generations). This allows
for faster transfer rates and more memory. No drivers needed for Linux or Mac (inf file for Windows is needed
and included in the Arduino IDE), and the ability to have the Uno show up as a keyboard, mouse, joystick, etc.
Never fear for accidental electrical discharge, either since since the Uno R3 also includes a plastic base plate to
protect it!
The Uno R3 also adds SDA and SCL pins next to the AREF. In addition, there are two new pins placed near the
RESET pin. One is the IOREF that allow the shields to adapt to the voltage provided from the board. The other
is a not connected and is reserved for future purposes. The Uno R3 works with all existing shields but can adapt
to new shields which use these additional pins.
Arduino is an open-source physical computing platform based on a simple i/o board and a development
environment that implements the Processing/Wiring language. Arduino can be used to develop stand-alone
interactive objects or can be connected to software on your computer (e.g. Flash, Processing, MaxMSP). The
open-source IDE can be downloaded for free (currently for Mac OS X, Windows, and Linux).
https://www.sparkfun.com/products/11021
The ACS712 sensor uses a Hall effect sensor to output a voltage relative to the current flowing through the IP+
and IP- pins. The advantage of using a Hall effect sensor is that the circuit being sensed and the circuit reading
the sensor are electrically isolated. This means that, although your Arduino is running on 5V, the sensed circuit
can be operating at higher DC or AC voltages!
The amplified breakout board is capable of sensing very small currents down to around 10mA and large currents
up to 5A! However, since the output is analog, your usable readings will be limited by noise and the resolution
of the ADC reading the output. This sensor is not recommended for current sensing lower than 10’s of
milliamps.
https://learn.sparkfun.com/tutorials/acs712-low-current-sensor-hookup-guide/all
The HC-05 is a very cool module which can add two-way (full-duplex) wireless functionality to your projects.
You can use this module to communicate between two microcontrollers like Arduino or communicate with any
device with Bluetooth functionality like a Phone or Laptop. There are many android applications that are already
available which makes this process a lot easier. The module communicates with the help of USART at 9600
baud rate hence it is easy to interface with any microcontroller that supports USART. We can also configure the
default values of the module by using the command mode. So if you looking for a Wireless module that could
transfer data from your computer or mobile phone to microcontroller or vice versa then this module might be the
right choice for you. However do not expect this module to transfer multimedia like photos or songs; you might
have to look into the CSR8645 module for that.
https://components101.com/wireless/hc-05-bluetooth-module
The SIM800L module supports quad-band GSM/GPRS network, available for GPRS and SMS message data
remote transmission. The SIM800L communicates with microcontroller via UART port, supports command
including 3GPP TS 27.007, 27.005 and SIMCOM enhanced AT Commands. It also has built-in level translation,
so it can work with microcontroller of higher voltage than 2.8V default. Besides, the board also supports A-GPS
technique which is called mobile positioning and gets position by mobile network. This features make it can
also be a tracker module.
https://robokits.co.in/wireless-solutions/gsm-gprs/sim800l-gprs-gsm-module-micro-sim-card-core-board-quad-
band-ttl
