Keyestudio SR01 Ultrasonic Sensor: More in Little Package

The Keyestudio SR01 Ultrasonic Sensor is small in size, yet big in potential. This low-cost distance-measuring module works with sound waves-just like bats do-to measure the distance between an object and the sensor. Lightweight in build and compact in size, this device can be interfaced with just about any system. Now, let’s take a closer look at what makes this sensor tick.

The SR01 emits high-pitched noises that are beyond human perception. These pulses bounce off of objects back to the sensor. By timing this round trip, the sensor calculates how far things are away. Simple yet brilliant.

This sensor is small in size. It is only 49mm x 22mm x 19mm in size, even smaller than a credit card. Its net weight is just 9.2 grams. You could even forget that this is in your pocket. Because it is so small, it will be ideal for spaces that are small or projects that require a lightweight element.

The SR01 is a good team player; it operates with both 3.3V and 5V systems. This versatility of voltage means it can be connected to a number of different devices-from tiny microcontrollers to larger boards, this sensor fits right in.

Don’t let its size fool you. The SR01 can detect objects up to 3 meters away. That is roughly the length of a small car! It does have a blind spot, though. Anything closer than 4cm is too near for it to see. For most projects this range hits the sweet spot.

The SR01 is accurate but narrow-minded. It can detect objects only within its 15-degree cone directly in front of it. This narrow focus makes it great for very precise measurements but may completely miss objects that happen to be a little off to the side.

This sensor is no fragile flower. It works in temperatures from -10°C to +60°C. That is from a chilly winter day to a scorching summer afternoon. It’s also RoHS compliant, meaning it’s free from certain harmful substances.

The SR01 is a little thirsty. It uses between 50mA and 100mA of current. For most projects this is not an issue, but it’s something you should pay attention to for battery-powered devices.

Keyestudio has designed the SR01 to be as user-friendly as possible. It features a standard 4-pin interface with 2.54mm spacing, like most of these. That will be easy to connect up to a breadboard or other device. The 3mm mounting holes allow attaching this to your project for secure fastening.

Keyestudio offers good support for the SR01: Arduino software-very popular and easy to use; a wiki page; tutorials. This makes things easier on the beginner and a lot more fun for the expert.

While the actual cost is not supplied, it’s said to be “very affordable,” which puts it in range for hobbyists and professionals interested in making this potentially game-changing sensor a part of their projects. An excellent choice for those on a budget who still want to enable distance sensing.

These features open up a lot of possibilities. A few ideas might be :

– Obstacle detection for robots
– Parking assistance systems
– Water level measurement
– People counting above doors
– Interactive art

Not every product is perfect, neither is the SR01 quirky. The narrow detection angle means it could miss some objects unless precisely aimed at the object. The 4cm blind spot could be a problem for very close-range detection. And the power consumption might be considered high for projects powered by batteries.

The Keyestudio SR01 Ultrasonic Sensor is quite a capable little gadget. It boasts good range, works in varying conditions, and is pretty easy to use. Its small size and low cost make it accessible for many projects. It has its limitations, though they are minor in most uses.

The SR01 will be something worth seeking-after, whether one is a maker, a student, or even a professional in need of distance sensing. The board is a good tool-the one that brings your next project to life-be it in robotics, art, or solving real-world problems.