How to tell if there is an object in front of you arduino

Obstacle avoidance sensors or ultrasonic sensors (HC-SR04) can be used.

Infrared emission and infrared reception can be placed on both sides of the box respectively, and then the signal of the infrared receiver can be detected by Arduino IO, and the infrared receiver cannot receive the corresponding infrared signal when there is an object blocked, so that whether there is an object in the box can be judged according to the state of IO detection, and then displayed.

Sensible Electronic Design VGZ

There are such switches, and there are quite a few types of such switches.

This kind of switch usually includes three parts, one is the sensor, which uses certain substances with physical effects on force, heat, light, electricity, magnetism, sound and so on as sensitive components; the second is the conversion circuit, which converts physical effects into electrical signals; The third is the actuator, which can be used in the form of contact switches, relays or electronic triggers to achieve a variety of action control methods, including the first on, the second off, etc.

The name of this type of switch often varies from sensor to sensor. For example, light switches, temperature switches, infrared switches, magnetic switches, and so on.

After power-on, the diode of the photosensitive device is lit, the OUT output is low, the LED is lit, when the object passes in the middle of the photosensitive device, the OUT becomes high, the LED is off, and it is maintained; When the object passes through again, the OUT gets higher and the LED goes off and holds.

1. Use photoelectric switch or proximity switch to realize level detection, that is, to sense the passage of objects;

2. The switch and the relay are connected into the form of "trigger", so that they can be turned on and turned off for the second time.

Proximity sensor or masking switch.

How to judge the distance between the car (reference) 1. How to judge the distance between the rear car when overtaking and changing lanes: The relationship between the size of the car shadow in the mirror and its distance is as follows: 1. The car shadow occupies all the rearview mirrors - the car distance is 3m; 2, the car shadow occupies the rearview mirror 2 3 - the car distance is 5m 3, the car shadow occupies the rearview mirror 1 2 - the car distance is 9m 4, the car shadow occupies the rearview mirror 1 3 - the car distance is 12m two, traffic jam with the car such as.

Not necessarily, all aspects are fine, as long as you can think of it.

Let me show you my arduino work.

In this way, data drift often occurs when the distance of the object to be measured changes abruptly.

There's so much to do, you have to know what you want to do.

Decide what you want to do first, and then gather information