Buzzer Based Reminder System
by CM Abeykoon in Circuits > Electronics
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Buzzer Based Reminder System
The Buzzer-Based Reminder System is an effective electronic device that provides audible alerts for time-sensitive activities, primarily focusing on medication reminders. It is especially suited for visually impaired individuals, elderly users, and those uncomfortable with digital alarms.(04 hour,06 hour,08 hour,12 hour,24 hour).
In addition to medication reminders, it can assist with general task notifications and scheduled alerts where auditory signals are preferred.
Powered by a safe low-voltage DC supply (9V–12V), the system features user-friendly toggle switches, a reset button, and a simple display for caregivers, ensuring accessibility and ease of use.
Supplies
9V/12V Battery 1
Toggle ON/OFF Switch 1
Integrated Circuits (ICs)
CD4060 1
CD4020 1
CD4511 1
CD4017 1
LM358 1
555 Timer 1
7-Segment LED Display 1
Buzzer (12V) 1
Resistors(1 kΩ ,10 kΩ)
Capacitors(100 µF,10 µF)
Diode (1N4001)
PCB (Printed Circuit Board) 1
Enclosure 1
Wires and Connectors Various (as needed)
Design the Circuit
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Create a schematic diagram:
Connect the CD4060 to generate clock pulses.
Use the output from CD4060 to feed the CD4020 (for counting).
Connect the output of CD4020 to the CD4017 to select reminder durations.
Connect the outputs of the CD4017 to signal the buzzer via a relay.
Prepare the PCB
Lay out your circuit on the PCB based on your schematic.
Ensure sufficient space for each component and traces for connections.
Place Components and Assemble the PCB
Securely place and solder components onto the PCB:
- Start with resistors and capacitors.
- Solder ICs in the correct orientation.
- Connect the toggle switch and the buzzer.
Ensure all connections match your schematic.
Connect Power and Test the Circuit
Wire the 9V/12V battery to the power rail of the PCB.
Use jumper wires to connect the clock and output between the ICs:
- Verify the clock pulses and counting functionality.
- Test the output to ensure the buzzer activates correctly at the specified intervals.
Final Assembly and Documentation
Place the assembled PCB inside the enclosure securely.
Make sure the toggle switch, buzzer, and display are accessible.
Document usage instructions, including how to set the reminders and replace the battery.