The circuit described here would produce an output voltage having twice the magnitude of the input voltage. In this circuit, we are using 6 Volts as input supply [[wysiwyg_imageupload::]]and we are getting 12 volts as its output. It is based on the popularly used hex inverter CD4049 IC. This can be made with the help of single IC with few more components.CD4049 contains six inverter gates in one package as shown in diagram. In this, pin 3 is input and 2 is for output. For first gate similarly pin 5 is input and pin 4 is output for second gate similarly we have four more gates. Pin1 1 is for supply voltage and pin 8 is connected to ground. Pin 13 and 16 are unused.
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.