By sensing vibrations from footfall, a Footsteps Detector Circuit is a creative and affordable approach for catching intruders. It employs a simple setup with a low-cost loudspeaker and a mute […]
Battery Low Voltage Alarm Circuit
Despite its simplicity, the Battery Low Voltage Alarm circuit has a very important function. It forewarns you of approaching battery failure so that you may run to the store and […]
AC 220V Over Current Monitor and Cut OFF Circuit
The proposed AC mains 220 V load over current cut off circuit continuously monitors the current flowing through a connected load. If this current increases beyond a certain preset level, […]
Shock Vibration Detector Circuit using 801S Sensor
The shock alarm module that we are presenting to you can be used in a house as well as in a car. Given its low manufacturing cost, it can be […]
Child Crying Monitor Circuit using Power Line Communication
In this child crying monitor circuit when the baby wakes up in their room, the parents are immediately notified, even if they are in another room of their home. A […]
Monitoring 220V AC Load Current using Current Transformer [Circuit Diagram]
In this post we discuss a circuit which can be used for monitoring or controlling AC 220V load current by sensing the load current through a contactless current transformer. Figure […]