22-06-2011, 10:42 AM
abstract of shadow alarm
22-06-2011, 10:42 AM
abstract of shadow alarm
02-02-2012, 11:05 AM
to get information about the topic anti theft alarm for bikes full report ,ppt and related topic refer the link bellow https://seminarproject.net/Thread-anti-t...-for-bikes https://seminarproject.net/Thread-anti-t...wo-wheeler https://seminarproject.net/Thread-anti-t...car-audios
03-04-2012, 11:54 PM
how can i get a ppt on shadow alarm...i am not able 2 download it from your site ... you can mail me on srvshkhr[at]gmail.com.. its urgent
30-04-2012, 12:39 AM
bhenchod chutiyon... madarchodo... AJDFjdVnjshv shvbjsfNvja bhsvjsnrmv bjvksrjB
25-05-2012, 11:53 AM
SHADOW ALARM
SHADOW ALARM.pdf (Size: 110.65 KB / Downloads: 82) This opto-sensitive circuit sounds an alarm whenever a shadow falls on it. So it can be used at night by shopkeepers to protect the valuables in their showrooms. A dim lighting in the room is necessary to detect the moving shadow. Unlike opto-interruption alarms based on light-dependent resistors (LDRs), it does not require an aligned light beam to illuminate the photo-sensor. The circuit is powered by a 9V PP3 battery and uses the most sensitive photo-sensor L14F1 to detect shadows. It is portable and can be used at any place that is to be monitored. Op-amp μA741 (IC1) is used as a voltage comparator. Its inverting input is biased by the voltage obtained from the junction of 100k resistor R1 and the collector of phototransistor T1. The non-inverting input of IC1 gets a controlled voltage from potential divider R2 and VR1. In the presence of ambient light, the phototransistor conducts and the inverting input (pin 2) of IC1 gets a lower voltage than its non-inverting input (pin 3). This makes the output of IC1 high, which is indicated by the glowing of LED1. When a shadow falls on the photosensor, the output of IC1 goes low. This low pulse triggers the monostable The circuit is now ready to use. To test it, move a paper in front of the unit. If LED2 glows along with the beep of the buzzer, it means that the photo-sensor has detected a shadow.
04-04-2016, 12:53 PM
To get information about the topic “shadow alaram” full report ppt and related topic refer the links below
https://seminarproject.net/Thread-shadow...ull-report https://seminarproject.net/Thread-shadow-alarm-ppt https://seminarproject.net/Thread-shadow-alarm--23918 https://seminarproject.net/Thread-mini-p...adow-alarm |
|
Possibly Related Threads… | |||||
Thread | Author | Replies | Views | Last Post | |
give a project on tap water alarm | Guest | 1 | 769 |
21-09-2017, 04:00 PM Last Post: jaseela123 |
|
HOW DO I DOWNLOAD CAR PARKING GUARD CIRCUIT USING INFRARED WITH ALARM PROJECT REPORT | Guest | 1 | 613 |
18-04-2017, 04:58 PM Last Post: jaseela123 |
|
Power supply failure alarm | Guest | 1 | 310 |
06-03-2017, 11:10 AM Last Post: jaseela123 |
|
WIRELESS BASED RAILWAY BRIDGE DAMAGE OR TRACK FAULT NOTIFICATION WITH ALARM SYSTEMS | Guest | 2 | 1,540 |
31-12-2016, 11:58 AM Last Post: Guest |
|
water level alarm inductore | Guest | 1 | 239 |
29-09-2016, 09:20 AM Last Post: anusree |
|
shadow alaram | Guest | 2 | 347 |
07-04-2016, 03:53 PM Last Post: dhanabhagya |
|
shadow alarm | Guest | 1 | 336 |
19-01-2016, 09:45 AM Last Post: mkaasees |
|
Gas Sensor With Local Alarm And SMS Facility | Mehul Yadav | 3 | 345,094 |
22-09-2015, 12:44 PM Last Post: mkaasees |
|
pc temperature alarm | Guest | 3 | 3,044 |
07-09-2015, 10:32 AM Last Post: mkaasees |
|
intruder alarm system | sunny90 | 2 | 22,969,931 |
25-07-2015, 10:29 AM Last Post: mkaasees |