Digital Security System

Introduction This years electronics systems project was a information processing system security system. It was a multiplex project, because we first had to research the divergent behaviors for the project to be d whizz. Internet was the main way of research for this, and for the most luck into it didnt braid up anything as far as what we could use. So, in twisting we sat trim back and started to think, what would happen if we used a digital security code. So thats what we did, we put together a complicated system incorporating a dual blank-input NAND entrée, a quartet dual-input OR gate, and an inverter. When the correct crew is entered it triggers a SCR that in turn triggers a relay, making the origin turn on in the computer. If the wrong combination is entered it triggers other SCR that triggers a relay controlled dishonor circuit giving author to a piezo buzzer give wayting an timidity sound. Technical          The circuit supplies its birth advocate so it doesnt meddle with the power bestows wattage ratings. The power is a power lend circuit that incorporates the 7805 regulator chip. In the circuit all of the chips demand have a unvarying 5 volt supply.

only when of the switches on the circuit are DPST, with one of the establishs on the zippo 5 volts, another throw having a positive 5 volts, and the pole having to be shoot to either +5 or ?5 volts. When the pole is selected to the ?5 volts it sends a portend of 0, nevertheless if you select +5 volts it sends a augury of 1. When all of the inputs to the NAND gate are 1s it will emit a signal of 0 when that signal hits the inverter it turns it to a signal of one. When this signal is a one it... If you loss to get a full essay, order it on our website: Ordercustompaper.com

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