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参数资料
| 型号： | EVAL-433-LR |
| 厂商： | Linx Technologies Inc |
| 文件页数： | 8/16页 |
| 文件大小： | 0K |
| 描述： | KIT BASIC EVAL 433MHZ LR SERIES |
| 标准包装： | 1 |
| 系列： | LR |
| 类型： | 发射器，接收器 |
| 频率： | 433MHz |
| 适用于相关产品： | LR 系列 RF 模块 - 433MHz |
| 已供物品： | 2 个板，2 个发射器，2 个接收器，2 个连接器，2 根天线，电池，文档 |
| 其它名称： | EVAL-433-LR-S EVAL-433-LR-S-ND |
Theory of Operation
Transmitter Evaluation Board
The transmitter board is powered by an on-board 3V CR2032 lithium
battery. It has eight SPST pushbutton switches, the state of which is
encoded into a data stream using a Linx MS Series encoder. If a switch
is closed, the transmitter will be enabled while the encoder captures the
pushbutton states for encoding and transmission. The encoder will power
down the transmitter when the button is released. Buttons S0 (D0) and
S1 (D1) are used to activate the LED and buzzer on the receiver board.
All of the data lines have been wired out to the header to the right of
the prototyping area and can be accessed for use with other switches,
contacts, or microcontrollers.
Receiver Evaluation Board
The receiver board is powered by two AAA batteries. The LR Series
receiver exhibits a sensitivity of greater than –112dBm, so under optimum
line-of-sight conditions, the transmitter / receiver link can operate over
distances of up to 3,000 feet. The data recovered by the LR Series receiver
is decoded by a MS Series decoder, and the data lines are updated to
match the state of the data lines (or pushbuttons) on the transmitter board.
To demonstrate this, one data line is used to drive a LED while another is
used to activate a buzzer. This board also has a prototyping area with all of
the receiver and decoder lines brought out to a header.
Using the Kit
Using the kit is straightforward. Simply attach the antennas, turn on the
power, and press one or both of the buttons on the transmitter board.
When S0 is pressed, the buzzer will sound; when S1 is pressed, the LED
will turn on. When any button (S0–S7) is pressed on the transmitter board,
the corresponding decoder output (D0–D7) will be active high (V CC ) on the
prototyping header.
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