A Smart Pillbox For Timely Medication

The Smart Pillbox is built using classic analog and digital electronics components on breadboards, powered by a steady 5V power supply. At the heart of the timing system are two 555 timer ICs working alongside resistors and capacitors, such as the large 4700µf capacitor and the 26.6MΩ resistor, to keep track of when it is time to take medicine. When the timer reaches the set point, it sends a signal to a CD4017 decade counter IC. This counter sequentially activates different pathways connected to eight BC549 transistors, which act as electronic switches. As these switches turn on, they light up a series of 5mm LEDs (seven in total) to give a clear visual cue telling the user which compartment to open. At the same time, the circuit triggers a BT66 music IC connected to an 8Ω, 0.5W speaker to play an audible melody, reminding the user that it is medication time. A PC817 opto-isolator IC is also used to safely separate parts of the circuit, while a 1N4007 diode protects the system from reverse voltage. Together, these analog and discrete components create a reliable, repeating cycle of lights and sounds without needing any programmable microcontrollers or software.