Magic eye can be used as automatic guest indicator in your home. Just install this at the bottom of the door and whenever a person would arrive, his shadow will [[wysiwyg_imageupload::]]fall on the circuit giving an indication that somebody is present on the door without the knowledge of the visitor. It can also used as a prevention measure against vandalism. So, apart from homes, it can also be used shop and banks. This circuit is based on popularly known hexa inverter IC CD4011, LDR and a few more components. The circuit is based on NOT gate CD4049 IC. In NOT gate, we will get output as logic high when logic zero is provided and we will get logic zero when logic1 is provided in input. Keep on reading to find out how the circuit is constructed and how it works.
Monostable Multi vibrators or “One-Shot” pulse generators are used to generate a single output pulse, either “High” or “Low”, when a suitable external trigger [[wysiwyg_imageupload::]]signal or pulse T is applied. In this project, this trigger signal initiates a timing cycle which causes the output of the monostable to change state at the start of the timing cycle and remain in this second state, which is determined by the time constant of the Capacitor C and the Resistor R until it automatically resets or returns itself back to its original (stable) state. This circuit uses NOT gate to generate the monostable mode of 555 timer. Keep on reading to find out how the circuit is made and how it works.