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Re: A home Project
U can use Pyroelectric Infrared sensors or PIR Motion Detection Sensor Module (RKI-1370)
Interface this with 8051 micrcontroller.
Find the attached useful files
**broken link removed**
https://robokits.co.in/documentation/PIR%20Sensor%20Module.pdf
Mod: Do not upload...
Usage of shift registers to add additonal I/Os on board requires more processing time,
You can reduce the processing time by using 8-bit Octal transperent latch (ex. 74ls373) for output port, use 74LS244 for input port, with a decoder (2x4).
Here you need to spare one 8-bit port and two more...
I used FBUS communication with old NOKIA phones 3310, & 5110 5 years back. I remember the Mobile supports TTL voltage level RS232 signals. FT232 gives output +12V & -12V. Mobile requires 3.3V/5.0V. You can try this using RS232 to TTL level converter.
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