Tablet Reminder Uses Watch Module


Posted on Feb 6, 2014

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


Tablet Reminder Uses Watch Module
Click here to download the full size of the above Circuit.

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.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Stepping motor driver
    1-Wire Two-way level converter unit (from 1.8V to 5V) Reference design
    soft light dimmer circuit
    IR Harp
    pic based wwvb clock
    Touch Activated Alarm System
    Precision QRP Transmitter
    0-30V Lab Variable Power Supply



    Top