muhammad farris
New Member
This circuit saves both time and
electricity for students. It helps
to prevent them from dozing
off while studying, by sounding a beep
at a fixed time interval, say, 30 minutes.
If the student is awake during the beep,
he can reset the circuit to beep in the
next 30 minutes. If the timer is not reset
during this time, it means the student
is in deep sleep or not in the room, and
the circuit switches off the light and fan
in the room, thus preventing the wast-
age of electricity.
The circuit is built around Schmitt-
trigger NAND gate IC CD4093 (IC1),
timer IC CD4020 (IC2), transistors
BC547, relay RL1 and buzzer
So,the question is I want to add some component to my circuit to make it more useful.But i didnt know what component is suitable with my project.
electricity for students. It helps
to prevent them from dozing
off while studying, by sounding a beep
at a fixed time interval, say, 30 minutes.
If the student is awake during the beep,
he can reset the circuit to beep in the
next 30 minutes. If the timer is not reset
during this time, it means the student
is in deep sleep or not in the room, and
the circuit switches off the light and fan
in the room, thus preventing the wast-
age of electricity.
The circuit is built around Schmitt-
trigger NAND gate IC CD4093 (IC1),
timer IC CD4020 (IC2), transistors
BC547, relay RL1 and buzzer
So,the question is I want to add some component to my circuit to make it more useful.But i didnt know what component is suitable with my project.