Ever imagined how the street lights would turn on automatically in the evening and go off in the morning? Is there anyone who comes early morning to turn off [[wysiwyg_imageupload::]]these lights? The following circuit based project can perform this job properly. In this circuit, the output pin of the comparator goes high depending on the configuration of LDR so that it can be made light or dark activated. This output is connected to a transistor T1 (BC 547) which acts as a switch for the relay. This circuit uses the output from a simple light/dark activated circuit and drives a relay in its output which can be further coupled to switch on/off an electrical appliance in a household. An appliance can be made dark or light activated by slightly changing the circuit’s configuration. This idea finds numerous applications such as, automatic watering of gardens at evening, automatic night lamp, dark activated siren and so on. Read on more to find out how the circuit is made and how it works.
Night Lamp with Timer for Stairs
This circuit is based on the phenomenon of Push-ON and Auto-OFF. This means that when the circuit is switched ON, it will remain ON for specific period of Night Lamp with Timer for Stairs>time and then it will turn OFF automatically. Again to switch ON the circuit the user has to push the button ON…
Night Lamp using 555
Ever imagined how the street lights get turned ON automatically in the evening and gets switched OFF in the morning? Is there anyone who comes early morning to turn off these lights? The following circuit can perform this job properly. This project uses the output from a simple light/dark activated circuit known as LDR (Light Dependent Resistor) and drives a relay in its output which can be further coupled to switch on/off an electrical appliance in a household. An appliance can be made dark or light activated by slightly changing the circuit’s configuration. This idea finds numerous applications such as, automatic watering of gardens in evening, automatic night lamp, dark activated siren and so on.