Practical Drowsy Notifier: Traditional Chinese Circuit Design Guide
In short: Traditional Chinese Practical Drowsy Notifier. 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 2632 words of English technical text, translated and preserved without editing. It is intended for experimental and reference use, not for regulated or commercial certification.
Sleepy NotifierWhen a person is sleepy, the body and mind are relaxed, and the resistance value of the resting skin will change. This circuit can detect this information, convert it into an electrical signal, amplify it, and then activate the "electric shock" device to wake up the drowsy person.Circuit working principle:As shown in Figure 222, the detection circuit is mainly a transistor compound amplifier with a high amplification factor. The skin resistance of the human body serves as the lower bias resistor of the composite tube and is connected to the circuit by the detector. Normally, the composite tube is cut off due to reverse bias. Once the skin resistance increases to a certain value due to sleepiness, the tube becomes conductive, causing the reed relay to operate and turn on the power supply of the alarm circuit. …
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Lei Cheng
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