參數(shù)資料
型號(hào): CB-ACC-36
廠商: ConnectBlue
文件頁數(shù): 53/58頁
文件大?。?/td> 510K
描述: ANTENNA 1/2WV 2.4GHZ 10CM RPSMA
標(biāo)準(zhǔn)包裝: 1
天線類型: 鞭狀:1/2 波,偶極
頻帶數(shù)目: 1
頻率: 2.4GHz
增益: 2.5dBi
端子: RP-SMA
安裝類型: 連接器
高度(最大): 3.93"(100mm)
包裝: 散裝
產(chǎn)品目錄頁面: 558 (CN2011-ZH PDF)
其它名稱: 809-1001
 
 
 
 
 
 
 
Version 1.17  2011-09
53
A.2.3 LED and Switch Design
A.2.3.1 BLUE Signal
The BLUE logic LED signal is not multiplexed with any other functionality, which makes the
design more straightforward (for more information see Figure 19). There are two important
notes:
-    A blue LED requires about 3.5V forward voltage drop (cannot be used in a 3.3V sys-
tem).
-    The BLUE signal can be used to detect if the module is connected or not. The BLUE
signal flashes when the module is sending and receiving data (see Chapter 3, Table
14). See Figure 20 for an example on how to suppress the flashes.
 
 
Figure 19: A blue LED can be connected directly to the module if the LED current is below 4mA. A high
state (active low) makes the voltage drop over the LED to 2.2V. This is not enough to light the LED.
 
 
 
Figure 20: A Low pass filter and a 74HC08 suppress the flashes when the module is sending and receiving
data. The Blue LED can be removed if not required. The values are not suited in all applications and need to
be verified in a specific application.
 
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