The DC motor circuitry is used to control the gate(entry gate) by closing the entry when the counter counts up to 120, so that no automobile will be allowed in. The sensors are placed at both the entry and exit gate of the parking lot in order to provide a pulse to the up/down counter whenever an automobile enters or leaves the parking lot.
The up/down counters were used for both up count from 1 to 120 and down count from 120 to 0. The design was carried out using 3-cascaded 74HC190 decade up/down counters in connection with MCT6 phototransistor optocoupler sensors, Gated S/R latch, LEDs display, logic gates and DC motor circuitry. Department of Physics, ayero University P.M, Kano Tel:, STRCT In this work, a 120 capacity automobile parking control system was designed and simulated. 1 ayero Journal of Pure and pplied Sciences, 8(2): Received: June, 2015 ccepted: October, 2015 ISSN DESIGN ND SIMULTION OF 120 CPCITY UTOMOILE PRKING CONTROL SYSTEM USING UP/DOWN DECDE COUNTERS Galadanci, G.S.M., Gana, S.
