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Making a LilyPad Night-Light
Ed

Yaremwe na

Ed

13. Nyakanga 2026FI
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Making a LilyPad Night-Light

Give your fabric a sense of sight. A LilyPad light sensor tells the microcontroller how bright the room is, and a short program switches an LED on when it gets dark. Sew it into a bag, a hat or a bedside patch for a soft glow that only appears at night — your first sensor-driven wearable.

Hagati
1-2 hours

Amabwiriza

1

Sew the board, sensor and LED

Sew a LilyPad Arduino, a LilyPad light sensor and a LilyPad LED onto felt. Wire it: the LED's + tab to pin 5 and its - tab to -; the sensor's + tab to the board's +, its - tab to -, and its signal (S) tab to analog pin A2. Keep the power (+), ground (-) and signal lines from crossing anywhere.

Ibikoresho by'iyi ntambwe:

LilyPad Arduino Simple BoardLilyPad Arduino Simple Board1 igice
LilyPad Light SensorLilyPad Light Sensor1 igice
LilyPad LED - 5 pcsLilyPad LED - 5 pcs1 agapaki
Conductive Thread - 60g (Stainless Steel)Conductive Thread - 60g (Stainless Steel)1 agakoni
Urupapuro rw'ubwoya bwashongeshejweUrupapuro rw'ubwoya bwashongeshejwe1 urupapuro

Ibikoresho bikenewe:

Inshinge zo kudoda n'intokiInshinge zo kudoda n'intoki
2

Connect the programmer

Plug the LilyPad FTDI onto the programming header and connect the USB cable to your computer. Open the Arduino IDE and select the LilyPad Arduino board and its serial port.

Ibikoresho bikenewe:

Mudasobwa Ifite Arduino IDEMudasobwa Ifite Arduino IDE
LilyPad FTDI Basic Breakout - 5VLilyPad FTDI Basic Breakout - 5V
Umugozi wa USB-BUmugozi wa USB-B
3

Upload the night-light sketch

Paste this sketch and click Upload. It reads the light sensor and turns the LED on whenever the room is darker than the threshold.

lilypad_night_light.inoarduino
// LilyPad night-light: LED comes on when it gets dark.
// LED on pin 5, light sensor signal on analog pin A2.

const int LED_PIN = 5;       // LED
const int LIGHT_PIN = A2;    // light sensor signal
int threshold = 400;        // lower = waits for darker; raise to trigger sooner

void setup() {
  pinMode(LED_PIN, OUTPUT);
}

void loop() {
  int light = analogRead(LIGHT_PIN);  // 0 (dark) .. 1023 (bright)

  if (light < threshold) {
    digitalWrite(LED_PIN, HIGH);       // dark -> LED on
  } else {
    digitalWrite(LED_PIN, LOW);        // bright -> LED off
  }

  delay(100);
}
4

Calibrate the threshold

Cover the sensor with your hand — the LED should come on; in a bright room it should stay off. If it triggers too early or too late, change the threshold number in the sketch and re-upload: higher turns it on in more light, lower waits for darker.

5

Go wireless and wear it

Unplug the FTDI, sew a LilyPad coin-cell holder to the board (+ to +, - to -), drop in a CR2032 and switch on. Sew the felt onto a bag, hat or cushion — it now glows on its own whenever the light drops.

Ibikoresho by'iyi ntambwe:

LilyPad Coin Cell Battery Holder - w/Switch - 20mmLilyPad Coin Cell Battery Holder - w/Switch - 20mm1 igice
Bateri y'igiceri CR2032Bateri y'igiceri CR20321 igice

Ibikoresho

7

Ibikoresho bikenewe

4
Igiteranyo Giteganyijwe
Ibyo uwabikoze yaguze. Ibikoresho bidafite igiciro ubigura aho ubibonye.
$75.08

Blueprint zijyanye

Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame

Blinking an LED with LilyPad Arduino

Blinking an LED with LilyPad Arduino

na EdFI

Digitale

43
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0
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0
Reading a Photoresistor — SIK Circuit 6

Reading a Photoresistor — SIK Circuit 6

na EdFI

Digitale

104
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0
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CC0 Umurenge rusange

Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.

Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.

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