The intruders that are attempting to break into your home can be confused by using this micro-power flasher that you have. The device gives the idea that there are people present within the house at all times of the day and night by continuously emitting flashing light from its front-facing LEDs. The circuit may be powered by four AA-size batteries rated at 1.5V continuously for a significant amount of time. Both the human eye and the human brain have a rapid response to fast shifts in the brightness of the light, particularly flashing light. For full brightness to be perceived, at least 10 milliseconds of illumination from a flashlight is required. The capacity of the brain or retina known as "persistence of vision" maintains the memory of the vision for a period of twenty milliseconds (ms), after which it gradually disappears. The human eye is only able to distinguish individual flashes of the flashing light if there is more than 20 milliseconds of time in between each flash. A flashing light with a period of repetition that ranges from half a second to five seconds is particularly appealing to it. A high-intensity red LED is utilized in conjunction with a low-power CMOS

integrated circuit called CD4093 to produce crisp flashes. The CD4093 integrated circuit is a quad NAND gate, however only one of its gates functions as an oscillator here. To prevent floating and the subsequent harm caused by statics, all of the unused inputs have been tied to the positive rail in order to maintain their logic state as "1." LED1 is wired in such a way that it draws current from the storage capacitor C2, which is attached to it. Since LED1 is not directly driven from the output of the IC, this helps to reduce the amount of power that is drawn from the battery. The amount of current that is drawn from the battery to charge capacitor C2 is determined by the value of the resistor R1. The figure of 330 kilo-ohms indicates that the current drain will be around 18 micro-amperes. (Volts per Resistance = 18 microamperes) The amount of current that can flow through LED1 is controlled by resistor R2. A 1.5V AA cell with a rating of 1.6 Ah has a typical shelf life of five years provided it is properly stored. A high-quality and low-leakage battery has the potential to power the flasher for close to three years. The circuit can be built on a more compact perforated board, which reduces the associated expenses. Enclose it in a compact case that has a front panel that looks like it came from a burglar alarm. This will ensure that the blinking LED1 will appear to be the indicator that the alarm is active. For a more arresting appearance, use an LED that has a high brightness and is transparent. In the event that the power goes out, the flashlight can also be utilized as a keyhole finder and as a way to navigate through hallways and exit doors.