대전엑스포 (2025 과학축제 (매년 열림))

 

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미국인 미팅

베터리 잔량표시 (버튼 없이 표시됨)

Bargraph로 표시됨

단계는 아직 미정

버튼2개 (1번버튼 수동모드 // 2번버튼 자동모드)

http://www.ds-parts.co.kr/goods_detail.php?goodsIdx=19289

https://www.alselectro.in/product-page/4056-charging-module-c-usb

https://faqs.noctua.at/en/support/solutions/articles/101000081757-what-pin-configuration-do-noctua-fans-use-

https://coolenjoy.net/bbs/cooling/413288

https://www.amazon.ca/Delta-AFB0712VHB-4-Pin-70MM-Sensor/dp/B00U6V9S0Q

https://www.delta-fan.com/Download/Spec/AFB0712VHB-AC59.pdf

https://ko.aliexpress.com/item/1005005665931290.html?spm=a2g0o.productlist.main.21.478715b3c4ASBo&algo_pvid=e428e24d-9b08-42a3-b35a-3d48d01a3be4&algo_exp_id=e428e24d-9b08-42a3-b35a-3d48d01a3be4-20&pdp_ext_f=%7B%22order%22%3A%229%22%2C%22eval%22%3A%221%22%7D&pdp_npi=4%40dis%21KRW%217968%211018%21%21%215.48%210.70%21%402101246417468758148284563e7635%2112000033945939283%21sea%21KR%210%21ABX&curPageLogUid=OLhx3H3kribm&utparam-url=scene%3Asearch%7Cquery_from%3A

https://iotdunia.com/led-bargraph/

// LED Bar Graph Arduino Project 

const int analogPin = A0;       // Potentiometer input pin 

const int ledCount = 10;        // Total number of LEDs 

int ledPins[] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11};  // Digital output pins for LEDs 

void setup() { 

for (int i = 0; i < ledCount; i++) { 

pinMode(ledPins[i], OUTPUT); 

} 

} 

void loop() 

{ 

int sensorValue = analogRead(analogPin);              // Read analog input 

int ledLevel = map(sensorValue, 0, 1023, 0, ledCount); // Scale to LED count 

for (int i = 0; i < ledCount; i++) { 

digitalWrite(ledPins[i], i < ledLevel ? HIGH : LOW); // Light up LEDs accordingly 

} 

}

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https://electronics.stackexchange.com/questions/424518/battery-indicator-circuit

각 Zener Voltage를 신경써서 Zener Diode를 골라야함

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https://www.learningaboutelectronics.com/Articles/Voltmeter-circuit-with-zener-diodes.php

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https://www.youtube.com/watch?v=XvkRbxpsNIU

9v가 들어가면

빨간 동그라미로 표시한 구간에만 전류가 들어가서

LED가 3개 켜집니다.

제너 1V + 
저항은 고정 1K

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https://www.circuits-diy.com/simple-12v-battery-status-indicator/#google_vignette

12V 베터리면 

제일 끝단인 오른쪽 끝의 Zener는 그보다 작은 11V가 작합하다.

1n4729

1n4731

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SW-18015P

https://www.circuitbasics.com/how-to-setup-vibration-sensors-on-the-arduino/

★tutorial