power resumption alarm using 555
#1

Hi, i am Ahmed Tajudeen. i would like to get details on power resumption alarm using 555. I was told power resumption alarm using 555 will be available here and am living at Auchi and studying in Auchi Polytechnic, Auchi and now am doing my H.N.D project on power resumption alarm using 555. i will need help from the abstract down to the references.

Please send me the abstract down to the references of the power resumption alarm using 555
Reply
#2
Once again the most popular timer IC NE555 proved that its applications are limited only to the ingenuity of the user.

The circuit of power resumption alarm shown here is very simple, where IC1 is wired in a special kind of mode. When power supply resumes, pin 2 of IC1 is grounded through C1 and pin 3 goes high. This makes reset pin 4 to go high for about 10 seconds. When the capacitor C1 charges to two-third of the supply voltage, output of IC1 goes low, grounding the reset pin 4 and thus disabling the entire circuit.

The alarm circuit is wired around a second timer IC, IC2. Here it is used as an astable multivibrator, the frequency of which is about 1 kHz. This IC, IC2 is enabled when the output of IC1 goes high.

Thus, the speaker produces an alarm for about 10 seconds. After 10 seconds, IC1 restore its stable state. Capacitor C1 discharges quickly through pin 7, and the circuit becomes ready for the next detection, since pin 2 of IC1 is low. Thus, when power interrupts again an alarm is produced. The LED serves as an indicator.
Reply

Important Note..!

If you are not satisfied with above reply ,..Please

ASK HERE

So that we will collect data for you and will made reply to the request....OR try below "QUICK REPLY" box to add a reply to this page
Popular Searches: power failure and resumption alarm system, power failure and resumption alarm, power supply resumption alarm disadvantagesuise control, power supply resumption alarm disadvantages, power failure resumption alarm circuit diagram, power failure alarm ic 555 it s ppt, power failure resumption alarm project report pdf,

[-]
Quick Reply
Message
Type your reply to this message here.

Image Verification
Please enter the text contained within the image into the text box below it. This process is used to prevent automated spam bots.
Image Verification
(case insensitive)

Possibly Related Threads...
Thread Author Replies Views Last Post
  Over Speed Alarm Indicators of Electrical Motor with Digital RPM Indicator 0 250 25-07-2023, 05:33 AM
Last Post:
  someone with pecuniary common vindication or someone who power 0 415 09-09-2019, 06:23 AM
Last Post:
  someone with economic orthodox justification or someone who power 0 555 08-09-2019, 07:20 AM
Last Post:
  Earthquake detection alert alarm for people security ppt 0 864 06-01-2019, 09:29 AM
Last Post:
  Earthquake detection alert alarm for people security 0 784 06-01-2019, 09:25 AM
Last Post:
  fire alarm project for class xii pdf 0 1,180 31-10-2018, 08:37 PM
Last Post: Guest
  vijayawada thermal power station internship contact details 0 853 17-10-2018, 11:36 AM
Last Post: Guest
  foot step power generation system wikipedia 0 707 02-10-2018, 12:50 PM
Last Post: Guest
  advantages and disadvantages mains failure alarm circuit in pdf 0 780 01-10-2018, 11:48 PM
Last Post: Guest
  vijayawada thermal power station internship contact details 1 876 01-10-2018, 04:41 PM
Last Post: Guest

Forum Jump: