Your SlideShare is downloading. ×
http://www.urbanfreestyler.com/PROJECT REPORTDIGITAL CLOCKBY:MUHAMMAD HARIS JAWED.BE-ME-3B-1045147MAAZ AHMAD KHANBE-ME-104...
LM 8560
LM386
LTC 637D1G
Upcoming SlideShare
Loading in...5
×

Digital clock report

5,539

Published on

Published in: Education, Business, Technology
0 Comments
2 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
5,539
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
0
Comments
0
Likes
2
Embeds 0
No embeds

No notes for slide

Transcript of "Digital clock report"

  1. 1. http://www.urbanfreestyler.com/PROJECT REPORTDIGITAL CLOCKBY:MUHAMMAD HARIS JAWED.BE-ME-3B-1045147MAAZ AHMAD KHANBE-ME-1045150Introduction:A digital clock is a type of clock that displays the time digitally, i.e. in ciphers, as opposed to an analog clock, where the time is displayed by hands. Digital clocks are often associated with electronic drives, but the "digital" description refers only to the display, not to the drive mechanism. (Both analog and digital clocks can be driven either mechanically or electronically, but "clockwork" mechanisms with digital displays are rare.)<br />Displays:<br />To represent the time, most digital clocks use a seven-segment LED, VFD, or LCD display for each of four digits. They generally also include other elements to indicate whether the time is AM or PM, whether or not an alarm is set, and so on.<br />Setting:<br />If people find difficulty in setting the time in some designs of digital clocks in electronic devices where the clock is not a critical function, they may not be set at all, displaying the default after powered on, 00:00 or 12:00.<br />Digital clocks that run on mains electricity and have no battery must be reset every time the power is cut off or if they are moved. Even if power is cut off for a second, most clocks will still have to be reset. This is a particular problem with alarm clocks that have no "battery" backup, because even a very brief power outage during the night usually results in the clock failing to trigger the alarm in the morning.<br />To reduce the problem, many devices designed to operate on household electricity incorporate a battery backup to maintain the time during power outages and during times of disconnection from the power supply. More recently, some devices incorporate a method for automatically setting the time, such as using a broadcast radio time signal from an atomic clock, getting the time from an existing satellite television or computer connection, or by being set at the factory and then maintaining the time from then on with a quartz movement powered by an internal rechargeable battery.<br />Uses:<br />Because digital clocks can be very small and inexpensive devices that enhance the popularity of product designs, they are often incorporated into all kinds of devices such as cars, radios, televisions, microwave ovens, standard ovens, computers and cell phones. Sometimes their usefulness is disputed: a common complaint is that when time has to be set to Daylight Saving Time, many household clocks have to be readjusted.<br />Schematic:<br /><ul><li>Components:
  2. 2. LM 8560
  3. 3. LM386
  4. 4. LTC 637D1G
  5. 5. In4001
  6. 6. Switches
  7. 7. Capacitor
  8. 8. 100nf
  9. 9. 100mf
  10. 10. 18nf
  11. 11. 470uf
  12. 12. 10mf
  13. 13. Resistors.
  14. 14. 120 ohm
  15. 15. 100k
  16. 16. 10ohm
  17. 17. 91k
  18. 18. 10k
  19. 19. PCB Diagram:

×