In Multisim (or any other circuit drawing software) design a monitoring system to detect proximity of an object, using a Reed switch and transistors. An LED or a light can be used as an indicator; when two objects are in close proximity of each other an LED will lit. Then design should use a relay to switch on a siren. Use a 12 VDC relay (included in your component bag) with sufficient power rating for the contacts to turn on the siren. When the input voltage of the relay is close to 12V, the siren will sound and if the relay input is close to 0V the siren will go off. For the low sound volume, design an amplifier to amplify the output of the siren by a factor of 10. Assume that you can remove the speaker of the siren and place a transistor/Opamp amplifier between the siren circuit output and the 8Ω/2Wspeaker. Design the amplifier and specify your valid assumptions.
In Multisim (or any other circuit drawing software) design a monitoring system to detect proximity of an object, using a Reed switch and transistors. An LED or a light can be used as an indicator; when two objects are in close proximity of each other an LED will lit. Then design should use a relay to switch
on a siren. Use a 12 VDC relay (included in your component bag)
with sufficient power rating for the contacts to turn on the siren. When the input voltage of the relay is
close to 12V, the siren will sound and if the relay input is close to 0V the siren will go off.
For the low sound volume, design an amplifier to amplify the output
of the siren by a factor of 10. Assume that you can remove the speaker of the siren and
place a transistor/Opamp amplifier between the siren circuit output and the 8Ω/2W
speaker. Design the amplifier and specify your valid assumptions.
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