20-01-2013, 11:10 PM
Hai..i need a block diagram of anti sleepng alarm for students... For my mini project and i need to add a extra feature along with this circuit so suggest me any ideas
20-01-2013, 11:10 PM
Hai..i need a block diagram of anti sleepng alarm for students... For my mini project and i need to add a extra feature along with this circuit so suggest me any ideas
21-01-2013, 10:03 AM
to get information about the topic "anti sleep alarm for students block diagram" related topic refer the link bellow
https://seminarproject.net/Thread-antisl...r-students
28-09-2013, 03:08 PM
Anti sleep Alarm for Students Anti sleep Alarm.pptx (Size: 243.07 KB / Downloads: 104) Uses: This circuit saves both electricity and time for students. It helps to prevent them from dozing off while studying. It is also useful for drivers. It can be used in heavy vehicles which travel during nights. Components Bread board IC1 (CD4093),IC2(CD4020) Piezo elec buzzer Relay switch 60watt 230v bulb 12v DC adapter and AC power supply Resistors and variable resistors(22kohm), transistors, diodes, capacitors Push on button Connecting wires How does our circuit works? Every 30 min , the buzzer sounds just like snooze. The buzzer sounds for 1 minute until the push on button is not pressed. If the push on button is pressed, the buzzer resets for the next 30 minutes. If the button is not pressed , the bulb goes off. The circuit is built around schimdt trigger NAND gate IC1, timer IC2, transistors BC547, relay RL1 and buzzer. IC1 is used to generate clock for the timer IC2. The time period can be calculated as T=1.38 x R x C, R= R1 + VR1, C=C2. The timer IC 2 is 14 stage ripple counter. |
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