The circuit was designed to illustrate the operation of an electronic keypad to be utilized in the burglar alarm system by having five keys as the security syntax. The circuit was designed to ...

The burglar alarm circuit design was based on the operation of CMOS 4001 where a high output would only result if both the inputs to the gate are low. Burglar Alarm – one way of preventing break in’s ...

In spy movies, wireless-signal jamming is often depicted as a way to disable cell phones and other communications devices. In the real world, it can also be used to disable wireless home security ...