O'Reilly logo

Consumer Electronics by S. P. Bali

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

LCD TIMER WITH ALARM

Most microwave ovens feature at least one timer with an alarm. Older appliances used mechanical timers, but modern microwave ovens and cooking ranges feature electronic timers using digital circuitry. The concept of a timer is sketched in Fig. 50.7. In this system, the keypad is the input and both the digital display and alarm buzzer are the output devices. The processing and storage of data occur within the digital circuits block in Fig. 50.7 (a).

 

images

 

Fig. 50.7 Digital timer system

 

A somewhat more detailed block diagram of a digital timer is shown in Fig. 50.7 (b). The digital circuits block has been subdivided into four ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required