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 […]
Solar Stud Light Circuit
In this post we are going to explore solar road stud light, what is it? How do they work? And how can we construct our own. In this post we […]
Simplest Combination Lock Circuit Explained
A electronic combination lock is a device which is designed to activate an electrical solenoid locking system whenever the correct combination of numbers are entered into an attached keypad. To […]
Password Lock Circuit Using IC 4017
In this post we are going to construct a general purpose password based electronic lock circuit without any involvement of microcontroller. You can use this circuit for numerous applications where […]
Infrared Intruder Alarm Circuit using Photodiodes
The post explains a simple infrared intruder alarm circuit using an infrared transmitter and an infrared receiver module. The transmitter and the receiver photo diodes used in the two modules […]