28140 Parallax Inc, 28140 Datasheet
28140
Specifications of 28140
Related parts for 28140
28140 Summary of contents
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... USB version connects directly to PC, Mac or Linux machine and requires no additional wiring Bi-color LED for visual indication of status Copyright © Parallax Inc. RFID Card Reader Serial & USB (#28140 / 28340) Web Site: www.parallax.com Forums: forums.parallax.com Sales: sales@parallax.com Technical: support@parallax.com ...
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... The use of multiple tags at one time will cause tag collisions and confuse the reader. The tags available in the Parallax store have a read distance of approximately 3 inches. Actual distance may vary slightly depending on the size of the transponder tag and environmental conditions of the application. Copyright © Parallax Inc. RFID Card Reader Serial & USB (#28140 / 28340) Unique ID Unique ID Unique ID ...
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... GND G Note: Type Input Output Power Ground Copyright © Parallax Inc. RFID Card Reader Serial & USB (#28140 / 28340) Function System power, +5V DC input. Module enable pin. Active LOW digital input. Bring this pin LOW to enable the RFID reader and activate the antenna. ...
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... Checking the DTR box in the toolbar will enable the RFID Card Reader to send tag data to the display. Line Port Function RX Serial Receive DTR Data Terminal Ready Copyright © Parallax Inc. RFID Card Reader Serial & USB (#28140 / 28340) http://www.ftdichip.com/Drivers/VCP.htm Function Serial data from RFID Card Reader USB Activate/De-activate RFID Card Reader USB v2.1 8/28/2008 Page ...
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... Depending on the tag type, the energy is "harvested" by the tag's antenna and used to power up the internal circuitry of the tag. The tag will then modulate the electromagnetic Copyright © Parallax Inc. RFID Card Reader Serial & USB (#28140 / 28340) Test Conditions ...
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... Program Description ]--------------------------------------------- ' ' Reads tags from a Parallax RFID reader and compares to known tags (stored ' in EEPROM table). If tag is found, the program will disable a lock. ' -----[ Revision History ]------------------------------------------------ Copyright © Parallax Inc. RFID Card Reader Serial & USB (#28140 / 28340) v2.1 8/28/2008 Page ...
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... HIGH Enable Check_List: FOR tagNum = 0 TO LastTag pntr = tagNum * READ pntr, char IF char <> tag0 THEN Bad_Char Copyright © Parallax Inc. RFID Card Reader Serial & USB (#28140 / 28340) ' low = reader on ' serial from reader ' speaker output ' lock/latch control ' 3 tags RFID bytes buffer ...
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... Reads tags from a Parallax RFID reader and compares to known tags (stored ' in EEPROM table). If tag is found, the program will disable a lock. Copyright © Parallax Inc. RFID Card Reader Serial & USB (#28140 / 28340) ' all match -- good tag ' groan ' for testing ' remove latch ...
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... FrAdj CON $0AA #CASE BS2Px TmAdj CON $607 FrAdj CON $2A #ENDSELECT Copyright © Parallax Inc. RFID Card Reader Serial & USB (#28140 / 28340) ' low = reader on ' serial from reader ' speaker output ' lock/latch control ' x 1.0 (time adjust 1.0 (freq adjust 0.265 ' x 1 ...
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... GET idx, chkChar IF (char <> chkChar) THEN Bad_Char #ENDIF NEXT GOTO Tag_Found Copyright © Parallax Inc. RFID Card Reader Serial & USB (#28140 / 28340) ' does module have SPRAM? ' RFID bytes buffer ' character to test ' from EEPROM table ' tag byte index ' character from table ...
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... Name1, Name2, Name3], idx DO READ idx, char IF (char = 0) THEN EXIT DEBUG char idx = idx + 1 LOOP RETURN Copyright © Parallax Inc. RFID Card Reader Serial & USB (#28140 / 28340) ' try next tag ' print message ' groan ' print name ' remove latch ' beep ' restore latch ' point to first character ...