This circuit generates a warning alarm when someone tries to lift your luggage while you are traveling in bus or train so that we may get alerted. During our journey through train and bus, we carry ...

Here is an inexpensive circuit of a wireless cashbox security alarm realized using generally available low-cost components. Why it is inexpensive when compared to readily available wireless security ...

Normally, the fire alarm initiating device, notification appliance and signaling line circuits are not run outside the building. When we have no choice but to run them overhead or underground, ...