The circuit will provide a beeping sound to alarm the household that the refrigerator door has been opened for more than 20 seconds. 4060 – a 14-bit ripple counter with internal oscillator that has ...

Which pool alarms for kids are best? Having a pool in the backyard is every child’s dream. However, backyard pools hide a sinister side. If children too young to swim find their way in without your ...

The circuit was intended for monitoring and measuring the fluid level or content in a storage tank or reservoir by providing visual display with an audible alarm that can be switched. Light Emitting ...