Efficient Parking System: Real-Time Updates for Available Spaces

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dasani190
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It is always a headache when finding for parking spaces especially at shopping malls, one of the main problems is that there is no indication of whether the parking lot is full or there is still space. Design a parking system that will inform the users the current state of the parking lot.

how to do this?
 
how to increase the limit from 20 to 60?
 
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  • Circuit schematic of a parking counter using two 74HC190 up/down counters (U9, U6) driving two 7447N seven-segment decoders (U4, U7), with SR latch, AND/NAND/OR gates, and switches S1, S2, S3.
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