I want to measure the distance to an obstacle using an LED infrared emitter and an IR photodiode, but it is not working correctly.
I am using an Arduino microcontroller, and I purchased the sensor from Temu.
Link: https://www.temu.com/goods.html?_bg_fs=1&goods_id=601099533870597&sku_id=17592289886431&_x_sessn_id=yv1ec4mxm0&refer_page_name=bgt_order_detail&refer_page_id=10045_1716208253115_3s0h0vglu9&refer_page_sn=10045
The wiring is as shown in the photo.
The program is as follows.
enter image description here

int analog_Pin = A0;
void setup() {
  // put your setup code here, to run once:
  pinMode(PWM_Pin, INPUT);
  Serial.begin(9600);
}

void loop() {
  delayMicroseconds(500);  //wait      
  Serial.println(analogRead());
}

We tried various resistance values,
I also tried different orientations on the receiver side, and since I bought multiple parts, I tried with those multiple pieces.
That’s about it.

Ultimately, I would like to be able to use these two LED IR emitters and IR receiver diodes to measure distances as close (30cm ~ 5cm) as possible.
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