Morning Alarm for babies
Here is a pleasant wake up alarm for the babies. As the morning light breaks in, the alarm gently wakes up the baby with a soothing musical note. What a pleasing way to make the baby rise to the day! As already described, LDR has a very high resistance in darkness, which falls low as [...]
Light Alarm (Sun Up Alarm)
This circuit designed to sound a loud alarm at the break of the dawn especially for those wh cannot wake up even with an alarm clock. Circuit can be modified as an intruder alarm or as a security alarm. Needless to say that 1.8 KHz astable multivibrator with 555 is used here again with a [...]
