Using digital communication knowledge to design a distance measuring system

Safety obstacle avoidance mobile robot is one of the basic problem. The obstacle and robots get is the distance between the safety of obstacle avoidance premise, ultrasonic sensor with its information processing simple, inexpensive and easy to implement hardware etc, and is widely used as range-finding sensors. The ultrasonic ranging system chooses the SensComp company produces the Polaroid 6500 series ultrasonic distance module and 600 series sensor, microprocessor using ATMEL company AT89C51. In this paper, this ultrasonic ranging system to carry on the detailed analysis and introduce.
1, ultrasonic sensors and metering distance principle
http://www.siliconray.com/l293-quadruple-half-h-motor-driver-module.html
Ultrasonic frequency is higher than 20 KHz to wave of [1]. In order to use the ultrasonic as detection means, must produce super living wave and receive ultrasonic. Complete this function is the device

Based on SCM stepping motor control system design

2.2 the keyboard/LED module
To realize the man-machine dialogue, this system design expanded the 3 x4 keyboard and 4 piece button matrix for 8 LED digital tube, manual operation this control system directly. After power system, through the keyboard input the step motor rev. Stop, the step speed and steering, LED by the dynamic display of the step motor speed and steering. The keyboard input and output of the tube by 8279 LED to control, reduce the burden of single chip microcomputer. 8279 the programming work in the keyboard scan input methods, read, have a keyboard to dither function, avoid triggered by mistake. Figure 3 for the keyboard LED module design structure diagram.
2.3 drivers/amplifier module
http://www.siliconray.com/atmega64-l-a-atmega128-l-a-atmega1281-atmega2561-core-board.html
The control system adopts stepping motor control with pulses of distributors (also called logic converter) PMM8713, this device is CMOS integrated circuits, the phase output driver ability (power source current or inhaled) to 20 mA, apply to control three-phase or four phase step motor, can choose the following six stimulation: the three-phase stepping electricity into: 1 phase, 2 phase 1-2 phase; Four phase step electricity into: 1 phase, 2 phase 1-2 phase. Input mode can choose single clock (plus direction signal) and double clock (are turning or reverse the clock) two ways, has the positive &negative control, initialization reset, monitoring, the origin of the stimulation monitoring and input pulse monitor etc. Function. PMM8713 device by the clock choose the incentive mode control, stimulation judgment and reversible counter parts of ring, etc, all input ? within

Siliconray：STC 8051 professional Kit

Siliconray：STC 8051 professional Kit
STC 8051 professional tools is a kind of high performance rich resources development board. The board of directors has many peripherals such as bitmap LED, color dot matrix LCD, SD slot, PS2 ports, stepping motor drive, dc motor, infrared sensors and temperature sensor. It reflects the single chip microcomputer STC full performance.
http://www.siliconray.com/stc-8051-professional-kit.html
On-board resources
● Default processor is STC12C5A60S2
● Crystal oscillator can be changed. There＇re 11.0592MHz、12MHz and 24MHz crystal oscillators supplied with the kit
● Eight LED
● PCF8591T four AD one DA chip
● One ISP programmer port
● ULN2003 Darlington transistors array can be used to drive buzzer, relay, DC Motor and stepper motor.
● USB Type B connector is used as power supply and program STC microcontroller.
● DB-9 Female connector is for RS-232 communication after programming STC microcontroller.
● DC power connector is for external supply and voltage is 7V -12V
● PS2 connector is for standard keyboard test
● Eight 7 -segment LED

● DS18B20 temperature sensor port
● DS1302 RTC (Real time clock), battery power supply
● AT24C02 chip for data restore on power failure
● SD slot
● USB to UART bridge chip PL2303HX
● RS232 to TTL lever convertor chip SP3232EEN
● One buzzer
● One relay
● Infrared receiver
● 1602 character dot matrix LCD port
● 128x64 dot matrix LCD port
● 8x8 dot matrix LED
● 4x4 keyboard matrix
● Four stand alone keys
● Four channels AD signal: Potential meter, photo resistor, thermal resistor and external signal
● One DA output

siliconray:BP149-01 MSP430F149 Development Board

siliconray:BP149-01 MSP430F149 Development Board
http://www.siliconray.com/bp149-01-msp430f149-development-board.html

1. USB port support USB power supply, USB download and USB communication (PC communications).
2. URAT communication test can use USB interface and PC.
3. Eight led drive makes the program convenient debug.
4. All pins connecting cables and 2.54 mm double standard space convenient flat extension.
5. Wireless module connectors can be used to make wireless data transmission test.
6. 14 needle JTAG car standard port and reset button.
7. Three power connectors can be used for the power of the external equipment
8. it can be powered by USB or powered externally
9. 4 brass screws mount
10. The fundmental system board can easily change chip.

Accessories List of BP149-01 Development Board
1. One smallest system board.
2. One USB calbe
3. Mounting screws
4. One CD.

VMA2015 15W Class D Audio Amp Module

VMA2015 is an all integrated, compact size and high efficiency (up to 88%) stereo audio amplifier module. With advance modulation and swithching schemes this module provide a class AB performance in a power and space save way. The output power is up to 15W on an 8Ohm load. No heat sink needed even when VMA2015 is work at the maximum output power.
http://www.siliconray.com/catalogsearch/result/?q=VMA2015

Applications
Portable audio
Car audiol
Entertainmentl
Desktop audiol
PC Audio
Other high efficiency sound systems

TDA7294 100V 100W DMOS AUDIO AMPLIFIER

VERY HIGH OPERATING VOLTAGE RANGE(±40V)
DMOS POWER STAGE
HIGH OUTPUT POWER (UP TO 100W MU-
SIC POWER)

MUTING/STAND-BY FUNCTIONS
NO SWITCH ON/OFF NOISE
NO BOUCHEROT CELLS
VERY LOW DISTORTION
VERY LOW NOISE
SHORT CIRCUIT PROTECTION
THERMAL SHUTDOWN
http://www.siliconray.com/tda7294.html
DESCRIPTION
The TDA7294 is a monolithic integrated circuit inMultiwatt15 package, intended for use as audio class AB amplifier in Hi-Fi field applications (Home Stereo, self powered loudspeakers, Top-class TV). Thanks to the wide voltage range and to the high out current capability it is able to sup-ply the highest power into both 4 ? and 8? loads even in presence of poor supply regulation, with high Supply Voltage Rejection. The built in muting function with turn on delay simplifies the remote operation avoiding switching on-off noises.

RTB11 mini low pressure mixed sound system headphone amplifiers

Introduction

http://www.siliconray.com/mini-6n11-low-voltage-hybrid-hifi-headphone-amplifier.html

RTB11 mini low pressure mixed sound system headphone amplifiers

RTB11 is a miniature hybrid Hifi headphone amplifier working with only 24V power supply. The design is very simple and unique. RTB11 uses 6N11 as input stage and IRF630 as output stage.
Features
- In Put Power: DC24V 500mA
- Input Sensitivity:50mV
- Input Impedance: 100KOhm
- Out-Put Impedance:32~600 Ohm
- Dynamic range: 84.6dBA((300 ohm) 89.8dBA(33 ohm)
- Gain:20dB
- Frequency response:10Hz-60KHz +/- 0.25dB
- Minimum THD: 0.016%(300 ohm) 0.45%(13 ohm)
- Signal/Noise Ratio >90dB
- RCA 2CH Input X1
- 6.3mm 2CH Output X1, 3.5mm 2Ch output x 1
- Dimension:95mm (D) X 90mm (W) X 32mm (H)

siliconray：Tube Audio Signal Level Indicator 6E2 Cateye

Description:

 http://www.siliconray.com/6e2-cateye-tube-audio-signal-level-indicator.html

It is a beautiful cateye audio signal level indicator designed with 6E2 cateye tube. The cateye "jumps" with the stength of the input signal, very beautiful at night.
Features
- Designed and build with brand new 6E2 cateye tube
- On board boost dcdc for high voltage power supply
- Signle AC9V or DC12V supply
- Adjustable brightness
- Adujstable sensitivity
- Small size, can be embedded into amplifiers easily
Spec
- Power dissapation: <9W
- Power supply: AC9V or DC12V
- PCB size: 79mm x 48mm

RA-1 Class A Audio Amplifier Musical Fidelity A1 Design

http://www.siliconray.com/catalogsearch/result/?q=Audio+Amplifier+

Brief introduction
this is a A1 Class A Audio Amplifier built by the design of Musical Fidelity A1 audio amplifier.
Features
±18 to ±22V power supply

20W x 2 output
2SC5200/2SA1943 for power output
All balanced Class A design
Collector driving
BD139 and BC140 for medium power
2.0mm white FR-4 PCB
BC556, BC546 as signal amplifier

FU-50 Single End Tube Amplifier Kit

FU-50 Single End Tube Amplifier Kit
Features:
5Z3P tube rectifier
6J8P preamplifier
FU-50 power amplifier
http://www.siliconray.com/catalogsearch/result/?q=Amplifier
Output Power 12Wx2
Load: 4Ohm or 8Ohm
Silkscreen stainless steel chassis

Part List
Tube and socket
- 8Pin tube socket x 3
- FU-50 socket x 2
- 5Z3P x1
- 6J8P x 2
- FU-50 x 2
Capacitors
- 450V/330UF x 1
- 400V/47UF x 1
- 400V/22 UF x 1
- 0.47UF film x 2
- 35V/470UF x 2
- 100V/100UF x 2
Resistors
- 39K 3W x 1
- 220K 3W x 1
- 1K 3W x 4
- 470K 3W x 6
- 680Ohm 3W x 2
- 100K x 2
- 100Ohm x 2
- 4.7K x 12
Accessories
- Silkscreen stainless enclosure
- 150W power transformer
- 3.5K to 4/8 ohm OP transformer x 2
- 2H 250ma choke coil x 1
- RCA connectors x 2
- Power switch x 1
- Output Connectors x 6
- Cables
- Shrink tubes
- Shielded cables
- Rubber foot x 4
- Wiring cables

TA2022 90Wx2 Class D HiFi Audio Amplifier 01

Features：
http://www.siliconray.com/ta2022-class-d-hifi-audio-amplifier-01.html

- NE5532 preamplifier
- Designed with Tripath TA2022 class-D hifi auido amplifier
- Dual AC 22-24V + single AC 6-9V
- Fully short circuit and thermal protection
- On board rectifier bridge, AC powered
- 100% HiFi capacitors
- uPC1237 protecting, no click sound when power on and off
- Board size: 100mm x 150mm

Beautiful mini 6F3 2.5Wx2 Tube Amplifier

Features
http://www.siliconray.com/beautiful-mini-2-5wx2-tube-amplifier.html

- Item code: 6F3
- Power Output: 2.5W+2.5W @ 8 ohms
- Frequency Response: 30-40Khz (+-1db)
- Input Sensitivity: 800mV
- Residual Noise < 0.6mVac
- Input AC Voltage: 100-240Vac
- Power Consumption: 33W
- Input Impedance: 10K ohms
- Output Impedance: 16/8/6/4 ohms (Japan Z11-EI48*24 Output Transformers)
- Dimensions: 132mm (w) x 96mm (d) x （100+70）mm (h)
- Weight: 1.7kg
- Input: RCA Jacks
- Output: Banana Jacks
- AC: Standard IEC Jack with Fuse protection (2A Fuse)
- 2pcs Chinese vintage tubes including
- Power cord and Phone cable not including
- Red, Silver, Black, Gold and Gray colors are available. Pls note what color do you prefer.

Siliconray:S3C6410 Core Board, 320 Pin Lead out

Description:
http://www.siliconray.com/catalogsearch/result/?q=S3C6410
1. 12MHz、48MHz、27MHz、32.768KHz clock source.
2. Size: 5CM*6CM,
3. Samsung S3C6410 processor, ARM1176JZF-S kernel, 533MHz/667MHz  frequency.
4. 128M Byte DDR memory, 256M Byte Nand Flash, 8Bit hardware correction algorithm, safe and reliable storage.( or 256M Byte DDR memory, 2G Byte Nand Flash, 8Bit hardware correction algorithm, safe and reliable storage)
5. It supports 5V power supply
6.Four free baseboard connectors
7. 320 pins meet various extension needs of users
8. Pass high and low temperature operation test. ( from -20℃ to 80℃)
9. High-quality board to board connectors to ensure long-term reliability.
10. All SMDs on kernel board.
Features:
System Bus:
     16 bit Data Bus:XM0DATA1-XM0DATA15
     20 bitAddres Bus:XM0ADDr0-XM0ADDR19
     Six selections:CSN0-CSN5
     Read-write signal:XM0OEN XM0WEN
SPI Bus 2 group:
     0:SPIMISO0、SPICLK0、SPIMOSI0、SPICS0
     1:SPIMISO1、SPICLK1、SPIMOSI1、SPICS1
UART four TTL levlal, 0 and 1 are 4 wire,2 and 3 are 2 wire:
     0:RXD0、TXD0、CTSN0、RTSN0
     1:RXD1、TXD1、CTSN1、RTSN1
     2:RXD2、TXD2
     3:RXD3、TXD3
IIC Bus:
     I2CSCL0、I2CSDA0
USB HOST:
     USBDP、USBDN
USB OTG:
     OTGDP、OTGDM、OTGID
SD CARD 2 group:
     0:MMC0_CLK、MMC0_CMD、MMC0_DATA0、MMC0_DATA1、MMC0_DATA2、MMC0_DATA3、MMC0_CDN
     1:MMC1_CLK、MMC1_CMD、MMC1_DATA0、MMC1_DATA1、MMC1_DATA2、MMC1_DATA3、MMC1_DATA4、MMC1_DATA5、MMC1_DATA6、MMC1_DATA7
AC97 Audio Interface:
     AC97_BITCLK、AC97_RSTN、AC97_SYNC、AC97_SDI、AC97_SDO
JTAG Interface:
     DBGSEL、RTCK、TDO、TDI、TCK、TMS、TRSTN
Boot Select:
     OM0 、OM1、 OM2、 OM3、 OM4 、SELNAND 、EINT13 、EINT14、 EINT15
CAM Interface:
     CAMCLK CAMHREF CAMPCLK CAMVSYNC CAMYDATA0-CAMYDATA7
DAC:
     DAC_OUT0、DAC_OUT1
AD:
     ADCIN0、ADCIN1、 ADCIN2、 ADCIN3、 TSYM 、TSYP 、TSXM 、TSXP
LCD:
     VD0-VD23、HSYNC、VSYNC、VDEN、VCLK
KEYBOARD:
     KP_COL0-KPCOL7 KP_ROW0-KP-ROW7

Siliconray:R25DX2 (IRAUDAMP7S Design) 250Wx2 Class D Audio Amplifier

Brief introduction:
It is a hifi Class-D 250Wx2 audio amplifier designed with IRS2092 audio driver and IRFI4019H MOSFET. It's almost a 100% clone of IR's reference design board IRAUDAMP7S, even the output inductors are same as IR's reference board. The price is only about 1/2 of IR's IRAUDAMP7S.
Features
http://www.siliconray.com/catalogsearch/result/?q=R25DX2

250 W x 2 channels, (THD=1%, 1kHz, 4 Ohms)
0.01% THD+N distortion @ 120W, 4 Ohms
Residual noise 200 μV, IHF-A weighted, AES-17 filter
Single layer PCB
OCP, OVP, UVP, DC protection & OTP
Half bridge/ full bridge selector
Featuring IRS2092S Gate Driver IC and IRFI4019H MOSFETs

siliconray：0Ω-20MΩ ±5%,177 values 0805 Resistors Book

0Ω-20MΩ ±5%,177 values 0805 Resistors Book
http://www.siliconray.com/catalogsearch/result/?q=R

Features
- 0 to 20MOhm
- 177 different values
- each 50pcs, total 8850pcs
- "must have" item for developers

siliconray：ColorPAL Color Sensor Module

Brief introduction:
The ColorPAL is a light sensor and miniature color which doubles as a color generator through its RGB LED. For sensing color, the ColorPAL uses its LED to illuminate a sample, one color component at a time, along with a broad-spectrum light-to-voltage converter to measure the light reflected back. The amount of light reflected from the sample under illumination from each red, green and blue LED can be used to determine the sample’s color.
http://www.siliconray.com/catalogsearch/result/?q=ColorPAL+Color+Sensor+Module

Features:
* Generates 24-bit color using onboard RGB LED.
* Detects a full range of colors, and outputs data as RGB (Red/Green/Blue) components.
* Detects broad-spectrum ambient light with sensitivity down to 44μW/cm2 per lsb.
* Onboard EEPROM for saving custom color detection and generation programs.
* Plugs into servo headers (with optional cable) or wireless breadboards.
* Color detection and generation details handled by onboard microcontroller.
* Autorun feature permits running a pre-designated EEPROM program with only a power supply.
* Single-pin interface uses a simple serial protocol to define and initiate color detection and generation.
Key Specifications:
* Power requirements: 5.0 VDC
* Communication: Serial 1-Wire (asynchronous serial, open drain)
* Dimensions: 1.72 x 0.90 x 0.65 in (44 x 23 x 17 mm)

siliconray：Serial Port Bluetooth MasterSlave Module

siliconray：Serial Port Bluetooth MasterSlave Module

Brief Introduction
This is a small bluetooth module with serial port

http://www.siliconray.com/serial-port-bluetooth-module-a-pair.html

Features

- 3.3V working voltage
- Designed with CSR chipset, compatible with bluetooth V2.0 protocol
- small size 28mm x 15mm x 2.35mm
- selectable baud rate 1200, 2400, 4800, 19200, 38400, 57600, 115200 bps
- can be connected with BT on cell phone, PC, PDA etc
- low power: 20-30ma during matching, 8mA after matched.

Default configuration:
Baud rate: 9600, N, 8, 1
Matching password: 1234

Notes:
Slave mode is default mode. If master mode is needed please specify

AT command set
1. communication test
send: AT
reply: OK

2. modify baudrate
send: AT+BAUD1
reply: OK1200

send: AT+BAUD2
reply: OK1400
1---------1200
2---------2400
3---------4800
4---------9600
5---------19200
6---------38400
7---------57600
8---------115200
9---------230400
A---------460800
B---------921600
C---------1382400

3. modify device name
send: AT+NAMEname
reply: OKname
where name is the device name you want to set

4. modify matching password
send: AT+PINxxxx
reply: OKsetpin
where xxxx is the 4 digit password you want to set

Configurations can be stored when power off.

Siliconray：Arduino ATmega2560-16AU

Arduino ATmega2560-16AU is the newest and most powerful arduino board. Comparing to ATmega 128 it has the following 2 new features:
http://www.siliconray.com/arduino-atmega2560-16au.html
1. ATMEGA2560 is used, the memory size is doubled comparing to ATmeaga 128
2. ATmega8U2 is used as replacement of FT232RL as USB bridget. Besids USB-UART bridge, it can also be configured as mouse, joystick, camera or keyboard.Features

	Microcontroller	ATmega2560
	Operating Voltage	5V
	Input Voltage (recommended)	7-12V
	Input Voltage (limits)	6-20V
	Digital I/O Pins	54 (of which 14 provide PWM output)
	Analog Input Pins	16
	DC Current per I/O Pin	40 mA
	DC Current for 3.3V Pin	50 mA
	Flash Memory	256 KB of which 4 KB used by bootloader
	SRAM	8 KB
	EEPROM	4 KB
	Clock Speed	16MHz

Siliconray：Mini portable multimeter DT-830B

Siliconray：Mini portable multimeter DT-830B

Description
DT-830BMAS830L is a small size portable multimeter. It can measure resistance, AC and DC voltage and current, HFE of transistor, diode

Features
- Super portable (125mm x 70mm x 20mm)
- AC voltage up to 750V
- DC voltage up to 1000V
- DC current 200uA to 10A
- Resistance up to 2M
- Diode testing
- Short circuit beeper
- HFE for NPN and PNP transistor
- Super cost effective

USB AMR JTAG Simulation J-Link v8

USB AMR JTAG Simulation J-Link v8



USB AMR JTAG Simulation J-Link v8

 Brief introduction:
J-Link is a JTAG emulator produced by SEGGER Company. It supports ARM emulation. In coordination with IAR EWARM，ADS，KEIL，WINARM，Real View , it supports all chips in ARM7/ARM9. It compatible with many integrated development environments. Also it is easy to handle and connect and best development tool of studying and developing ARM.
J-Link supports ARM kernel:
* ARM7TDMI（Rev 1）
* ARM7TDMI（Rev 3）
* ARM7TDMI-S（Rev 4）
* ARM720T
* ARM920T
* ARM926EJ-S
* ARM946E-S
* ARM966E-S
* ARM11
* Cortex-M3
Main features:
* It is a JTAG emulation of development environment.
* It supports all kernel chips in ARM7/ARM9 and cortex M3 mode includes Thumb.
* It supports almost all development environments such as ADS, IAR, KEIL, WINARM, and REAL VIEW.
* The speed of download is up to RM7:600kB/s，ARM9:550kB/s, though DCC, is 800kB/s.
* The highest speed of JTAG IS 12 MHz
* The range of target board is 1.2V, 3.3V and 5V, compatible.
* Ii has automatical baud rate identify function.
* It surveys all JTAG signals and target board voltage.
* It completely plugs and plays.
* It is USB powered.
* It has USB  cable and 20 pins flat cables.
* It supports many series connections of JTAG components.
* Standard 20 pins JTAG emulation connector.
* It is equipped 14 pins JTAG emulation connector.
* It is equipped 5V target board adapter.
* It has J-Link TCP/IP server and allows using J-Link by TCP/ IP network.

Package list:
* 1 V8 emulation mainframe.
* 1 20P standard JTAG cable.
* 1 fine-copper USB cable.

AVR ISP programmer

[External member includes following devices]
1. 1 USBISP;
2. 1 standard 10Pins flat cable (length is 50CM);
3. Driver and operating instruction;
4. 1 10Pins connector.
http://www.siliconray.com/catalogsearch/result/?q=avr
USBISP can resolve the problem of laptop, without parallel port, studying microcontroller download program and support VISTA system of Microsoft. Software and hardware are well-designed, easy to use and high reliability. Also, it supports AVR and S51 series microcontroller and programs fast.
AVR ISP programmer

Features:
1. It supports USB1.1or USB2.0 and WIN98,WINME,WIN2K,WINXP，WIN Vista Mac.
2. It is powered by USB port
3. During program chip, it can be powered by target board or USB.
4. Accelerate or decelerate download by jumper.
5. USB tyep A slave connector which can be connected with USB port of computer.

support device List:
51 series: AT89S51、AT89S52
AVR series:ATTiny12(L)、ATTiny13(V)、ATTiny15(L)、ATTiny24(V)
           ATTiny25(V)、ATTiny26(L)、ATTiny2313(V)、ATTiny44(V)
           ATTiny45(V)、ATTiny84(V)、ATTiny85(V)、AT90S2313(L)、AT90S2323(L)
           AT90S2343(L)、AT90S1200(L)、AT90S8515(L)、AT90S8535(L)
           ATMEGA48(V)、ATMEGA8(L)、ATMEGA88(V)、ATMEGA8515(L)
           ATMEGA8535(L)、ATMEGA16(L)、ATMEGA162(V)、ATMEGA163(L)
           ATMEGA164(V)、ATMEGA165(V)、ATMEGA168(V)、ATMEGA169(V)
           ATMEGA169P(V)、ATMEGA32(L)、ATMEGA324(V)、ATMEGA325(V)
           ATMEGA3250(V)、ATMEGA329(V)、ATMEGA3290(V)、ATMEGA64(L)
           ATMEGA640(V)、ATMEGA644(V)、ATMEGA645(V)、ATMEGA6450(V)
           ATMEGA649(V)、ATMEGA6490(V)、ATMEGA128(L)、ATMEGA1280(V)
           ATMEGA1281(V)、ATMEGA2560(V)、ATMEGA2561(V)、AT90CAN32
           AT90CAN64、AT90CAN128、AT90PWM2(B)、AT90PWM3(B)

ATmega128 minimum system board

ATmega128 minimum system board

1. MCU: ATmega128A/ATmega128/ATmega128L；
2. AD converter reference voltage is filtered by inductance and capacitance network.
3. External crystal is selectable by jumpers;
4. DIP connectors connected to all I/O ports;
5. On-board ISP and JTAG connectors;
6. Stable reset circuit;
7. PA1 and PA0 drive two LEDs to supply simple test;
8. The power supply and I/O pins is 5V;
9. PCB size: 52.3MMx80MM
http://www.siliconray.com/catalogsearch/result/?q=ATmega128A

 

Siliconray:1km nRF24L01+PA+LNA 2.4G Wireless Transceiver Module

Siliconray:1km nRF24L01+PA+LNA 2.4G Wireless Transceiver Module
Applications
• Wireless PC Peripherals
• Mouse, keyboards and remotes
• 3-in-1 desktop bundles
• Advanced Media center remote controls
• VoIP headsets
• Game controllers
• Sports watches and sensors
• RF remote controls for consumer electronics
• Home and commercial automation
• Ultra low power sensor networks
• Active RFID
• Asset tracking systems
• Toys

http://www.siliconray.com/1km-nrf24l01-pa-lna-2-4g-wireless-transceiver-module.html
Key Features
• Worldwide 2.4GHz ISM band operation
• 250kbps, 1Mbps and 2Mbps on air data rates
• Ultra low power operation
• 11.3mA TX at 0dBm output power
• 13.5mA RX at 2Mbps air data rate
• 900nA in power down
• 26μA in standby-I
• On chip voltage regulator
• 1.9 to 3.6V supply range
• Enhanced ShockBurst™
• Automatic packet handling
• Auto packet transaction handling
• 6 data pipe MultiCeiver™
• Drop-in compatibility with nRF24L01
• On-air compatible in 250kbps and 1Mbps with nRF2401A, nRF2402, nRF24E1 and nRF24E2
• Low cost BOM
• ±60ppm 16MHz crystal
• 5V tolerant inputs