Simple Bedwetting/Wet Diaper Alert Circuit is one special electronic helper!; it know when someone pee in bed or diaper and then it make sound like doorbell ding ding! So parents or helper can know fast and come for help, it is also good for kids who pee in bed at night or people who need […]
Alarm Circuits
Simple Light Activated Alarm Circuit
This Simple Light Activated Alarm Circuit is like very sharp nightlight, it have small part called LDR which work like a tiny eye. Furthermore, when light goes away fast like someone is moving near circuit it make sound or light happen to warn us. Moreover, it also uses other parts like transistors, resistors, capacitors to […]
Simple Freezer Alarm with Buzzer Circuit
Simple Freezer Alarm with Buzzer Circuit is like small guard for our ice food, it uses one sensor, thermistor to check cold level. Furthermore, if freezer become warm too much then buzzer makes loud sound to tell us something is not right, like food is going to melt. Hence, with this indication we can do […]
Simple High Temperature Alarm Circuit using IC 555
Simple High Temperature Alarm Circuit using IC 555 uses one special chip called IC 555 which works like a temperature guard; also it keep checking temperature always. Hence, if its too much hot it make alarm sound like buzzer and tell us something is getting too hot, so we can know early and fix before […]
Pressure Sensor Alarm Circuit
To begin with, this Pressure Sensor Alarm Circuit talks about one electronic device which can feel when pressure goes up or down. Think of a one special plate like doormat, pressure increases when someone steps on it; or if there is a change in air pressure inside the machine then this device is capable of […]
Simple Vibration Sensor Circuit
A Simple Vibration Sensor Circuit works like a small motion detector for electronics, it senses shaking or sudden movement and then sends an electrical signal. Furthermore, this type of circuit is good for use in thief alarm to feel someone come in or for earthquake to feel ground move; also, we can use it in […]