Practical Dosing Reminder: Traditional Chinese Circuit Design Guide
In short: Traditional Chinese Practical Dosing reminder. This entry documents a circuit & prototype taken from Chinese practical-technology literature, written for small-scale makers and home producers. The text below is the full English translation of the original Chinese workshop notes, covering materials and quantities, the step-by-step sequence, and the practical cautions recorded in the source. Roughly 4652 words of English technical text, translated and preserved without editing. It is intended for experimental and reference use, not for regulated or commercial certification.
Medication ReminderTaking medicine on time is necessary for patients to recover from illness. However, people who are busy with work or study and do not have the habit of taking medicine on time often forget to take medicine on time. Every time it is time to take medicine, it will play the music you like to listen to, constantly urging you to take medicine quickly. If you are not at home or the medicine is not around, it can still urge you to take medicine at the next time. It can be called a caring "nurse". The central device of this device adopts digital integrated circuit CD4020 and 14-level binary counter.Circuit working principle:Figure 195-1 is the circuit diagram of the medication reminder quality. It can be seen from the figure that the circuit consists of three parts: (1) medication interval time square wave oscillator and medication time square wave oscillator; (2) time pulse counting sequence; (3) music integrated sounder. Among them, the pulse counter is the most important.Figure 195-1IC1A and IC1B are square wave oscillators composed of NOR gates, which generate time pulses that match the music for 5 minutes. The square wave oscillator composed of IC1C and IC1D generates pulses with a medication interval of 3 to 5 hours. Its oscillation frequency is given by …
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Lei Cheng
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Lei Cheng