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Tag: working of sensor

automatic room light controller with visitor counter
Forum -> Project Doubts
the transistors are used to drive the common cathode of each 7 segment display,

the displays here are used with multiplexing technique means there is only one display works at a time but it shifts so fast therefor all display works simultaneously

the two LDR's here use for input as active low. means initially it is in high state (1)and it get input by grounding the pins (or 0)

digital visitor counter   working of sensor   
Posted by Ritesh on Saturday 14 July 2007 - 01:39:22

automatic room light controller with visitor counter
Forum -> Project Doubts
plz tell me that which microcontroller is used in the project "automatic room light controller with visitor counter" ?? In the description of the project 89c2051 is mentioned but in the circuit diagram 89S52 is used???????

automatic room light controller with visitor count   digital visitor counter   working of sensor   
Posted by isha on Friday 13 July 2007 - 02:01:30



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