Tablet Reminder Uses Watch Module

This device serves as a daily medication reminder. It incorporates a crystal watch and a 4001 quad 2-input NOR gate, with two of the gates (IC1a and IC1b) configured as an RS flip-flop. The watch is programmed to signal "tablet time," typically in the mornings, when an alarm is triggered by a high signal through diode D1, which sets the RS flip-flop. Additionally, this action activates the oscillator formed by gates IC1c and IC1d, driving an LED at a 10% duty cycle. A 10nF capacitor resets the watch alarm when a positive voltage is detected on pin 3 of IC1. The circuit operates with a current draw of only 50 µA from a 3V battery.

The medication reminder device functions through a well-structured electronic circuit aimed at providing timely alerts for medication intake. The core component of the system is a crystal watch, which maintains accurate timekeeping. The integration of a 4001 quad 2-input NOR gate allows for versatile logic operations, with two gates configured as an RS flip-flop. This configuration is pivotal for creating a memory element in the circuit that retains the alarm state until it is reset.

When the watch reaches the pre-set "tablet time," an alarm signal is generated. This signal is routed through diode D1, which ensures that the voltage is appropriately directed to set the RS flip-flop. Upon setting, the flip-flop enables the oscillator circuit composed of gates IC1c and IC1d. This oscillator generates a square wave output that drives an LED indicator, providing a visual cue for the user. The LED operates at a 10% duty cycle, which means it is on for 10% of the time and off for 90%, allowing for efficient power consumption while still being noticeable.

The presence of a 10nF capacitor in the circuit plays a crucial role in resetting the alarm. When a positive voltage is applied to pin 3 of IC1, the capacitor discharges, effectively resetting the flip-flop and silencing the alarm until the next scheduled medication time. This feature ensures that the device does not require manual intervention to reset after each alarm cycle.

The entire circuit is designed to be energy-efficient, drawing only 50 µA from a 3V battery. This low power consumption extends the battery life, making the device practical for everyday use without the need for frequent battery replacements. Overall, this medication reminder device combines timekeeping, logic control, and visual signaling into a compact and efficient solution for medication adherence.This device is used as a reminder to take medicine every day. This device actually contains a crystal watch and a 4001 quad 2-input NOR gate with two of the gates (IC1a & IC1b) wired as an RS flipflop. The watch is set to "tablet time", usually mornings, when an alarm is activated with a high signal fed via diode D1 which sets the RS flipflop and

enables the oscillator comprising gates IC1c & IC1d. This drives the LED with a 10% duty cycle. The 10nF capacitor resets the watch alarm when positive voltage appears on pin 3 of IC1. The circuit consumes only 50 µA with a 3V battery. 🔗 External reference