RINGING BELL INDICATING SUNRISE
The given project can be used to ring a bell as soon as the sun comes up in the morning.
In this circuit one IC 555, along with a LDR and a relay is used. A bell is used with the relay switch, which is operated at 220V AC. The circuit is operated by +9V supply. As soon as the sun rises then light fall on the LDR which gives trigger voltage at pin no.4 of the IC 555 and switches ON the transistor TR1 by which the relay will operate and bell will start ringing.
The given project can be used to ring a bell as soon as the sun comes up in the morning.
In this circuit one IC 555, along with a LDR and a relay is used. A bell is used with the relay switch, which is operated at 220V AC. The circuit is operated by +9V supply. As soon as the sun rises then light fall on the LDR which gives trigger voltage at pin no.4 of the IC 555 and switches ON the transistor TR1 by which the relay will operate and bell will start ringing.
Parts List::::
IC 555, Tr. BEL 127
Relay 6V, 150E,
LDR
Electronic BellResistance: 100K, 330E, Control 2K2
IC 555, Tr. BEL 127
Relay 6V, 150E,
LDR
Electronic BellResistance: 100K, 330E, Control 2K2
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