Mega2560-CORE

Introduce

Mega2560-CORE is a small, complete and breadboard-friendly board base on the ATMega2560. Its design is based on the Arduino Mega2560，so we can use it as a Arduino Mega2560 development board. In a different place, it lacks only a 6-foot download port and a reset switch. Reducing the hardware circuit that can we reduce the power consumption and the cost. Mega2560-CORE has a matching download line and the other one end of the download cable is a USB interface, so it is very convenient for use.

Features

Ø  Microcontroller ATmega2560

Ø  Operating Voltage (logic level) 3.3V or 5 V

Ø  Digital I/O Pins 54 (of which 15 provide PWM output)

Ø  Analog Input Pins 16

Ø  DC Current per I/O Pin 40 mA

Ø  Flash Memory 256KB

Ø  SRAM 8 KB

Ø  EEPROM 4KB (ATmega2560)

Ø  Clock Speed 16 MHz

Ø  Low power consumption, low cost

CS-4173 high-side current module

Introduce

The CS-4173 is a Low-Cost, Compact Current-Sense module. It is detected by collecting the high-side current to achieve
the load current, the main chip is MAX4173 high-side current-sense amplifier. The MAX4173 high-side current-sense
amplifier features a 0 to +28V input common-mode range that is independent of supply voltage. This feature allows the
monitoring of current out of a battery in deep discharge and also enables high-side current sensing at voltages greater
than the supply voltage (VCC). High-side current monitoring is especially useful in battery-powered systems, since it
does not interfere with the ground path of the battery charger. For the module, Derivation of calculation function is:
Vout = Vsense * 50, I = Vsense/Rsense, so the end result is I = Vout/(50*Rsense) = Vout/5, the unit is A.

Features

Low-Cost, Compact Current-Sense Solution
Wide 0 to +28V Common-Mode Range (Independent of Supply Voltage)
+3V to +28V Operating Supply
±0.5% Full-Scale Accuracy
Wide 1.7MHz Bandwidth
420μA Supply Current

Application

1. Notebook Computers
2. Portable/Battery-Powered Systems
3. Smart Battery Packs/Chargers
4. Cell Phones
5. Power-Management Systems
6. General System/Board-Level Current Monitoring
7. PA Bias Control
8. Precision Current Sources

REF-431

Introduce
REF-431 is a high precision voltage reference source which used TL-431 from Texas Instruments. The TL431 is
three-terminal adjustable shunt regulators, with specified thermal stability over applicable automotive, commercial,
and military temperature ranges. The output voltage can be set to any value between Vref (approximately 2.5 V) and
36V. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacements
for Zener diodes in many applications, such as onboard regulation, adjustable power supplies, and switching power
supplies.


Features
Sink-Current Capability . . . 1 mA to 100 mA
0.2-ΩTypical Output Impedance
Low Output Noise
Operation From −40°C to 125°C
Adjustable Output Voltage . . . Vref to 36 V

Bluetooth UART 2.1 EDR RF Transceiver Module serial RS-232 TTL Arduino STM32

■ INTRODUCTION

        

BT-1011 Bluetooth UART Module is a serial port Bluetooth module which with 2.54mm connector, the module have onboard 3.3V LDO and link indication LED, user will be very easy to use it in the application.

■ FEATURES

        

l  Operation voltage from 3.3V to 5.5V

l  Bluetooth 2.1+EDR compliant

l  Support up to 3Mbps high speed UART interface

l  Support AT Command

■ Pin out

    

			Description
1	CFG	I	Mode config pin: 0 = AT CMD Mode 1 = NORMAL Mode(Default)
2	RXD	I	UART RX , TTL-3.3V
3	TXD	O	UART TX , TTL-3.3V
4	GND	P	Ground
5	VCC	P	Power supply (3.3~5.5V)
6	---	---	N.U
7	---	---	N.U
8	---	---	N.U
9	---	---	N.U
10	---	---	N.U

        

Please notice:

1，  Default baud rate: 9600bps

2，  Pin code: 1234

■ AT Command

AT Command use fixed setting “9600,n,8,1”

All AT command with end character “\r\n”

No.	Function	Command	Parameter	Return
1	Test	AT	OK	None
2	Inquire BT Address	AT+LADDR	+LADDR = <PARA1>	<PARA1>: Local BT Add
3	Inquire Baud rate	AT+BAUD	+BAUD = <PARA1>	<PARA1>: Baud rate
4	Set Baud rate	AT+BAUD<PARA1>	1, +BAUD = <PARA1>   OK = Set Baud rate succeed 2, <ERROR_CODE> = Failed	0=2400 , 1=4800 , 2=9600 ,3=19200 , 4=38400 , 5=57600 , 6=115200 , 7=230400 ,8=460800 , 9=921600

■ ERROR CODE:

   SAVE FAIL: failed to save setting    PARA INVALID: invalided parameter

   READ FAIL: failed to reading     UNKNOW: unknow error