The HC-SR04 is a popular ultrasonic sensor used to measure distances accurately using sound waves. It operates by sending out a high-frequency ultrasonic pulse and measuring the time it takes for the echo to bounce back from an object. This time is then converted into distance using simple calculations.
Key Features:
Operating Voltage: 5V DC
Measuring Range: 2 cm to 400 cm (0.02 m to 4 m)
Accuracy: ±3 mm
Operating Frequency: 40 kHz
Trigger Input Signal: 10µs TTL pulse
Echo Output Signal: TTL level signal proportional to distance
Interface: 4 Pins – VCC, Trig, Echo, GND
Dimensions: Approx. 45mm x 20mm x 15mm
How It Works:
Trigger: A 10µs pulse is sent to the Trig pin.
Ultrasonic Burst: The sensor emits 8 ultrasonic waves at 40 kHz.
Echo Detection: The Echo pin stays HIGH until the waves return after hitting an object.
Distance Calculation: The duration of the HIGH signal is used to calculate the distance:
Applications:
Obstacle avoidance robots
Distance measurement systems
Level detection (water tank, bins)
Automated parking systems
Security systems
HC SR04 Ultrasonic sensor
🔁 Return & Refund Policy
At RoboWare, we stand by the quality of our products and strive to ensure your satisfaction. If something isn’t right, we’re here to make it better.
📦 Returns Eligibility:
You may request a return or exchange under the following conditions:
The item is unused and in its original condition and packaging.
The return request is made within 7 days of delivery.
The item is not damaged due to misuse or improper handling.
Custom-built robots or personalized kits are not eligible unless defective.
❗ Non-Returnable Items:
Opened electronic components (e.g., sensors, modules)
Damaged items due to user error or improper use
Custom orders or assembled robots made on request
💸 Refund Process:
Once we receive and inspect the returned item, we’ll notify you of the approval or rejection of your refund.
Approved refunds will be processed to your original payment method within 5–7 working days.
🔁 Replacements:
Faulty or damaged products (received damaged or non-functional) will be replaced at no additional cost.
You must share an unboxing video as proof in case of damage claims.
🚚 Return Shipping:
Customers are responsible for return shipping costs unless the item was defective or incorrect.
We recommend using a trackable shipping method.
🔧 Need Help?
Contact us anytime at robowarebyparas@gmail.com— we’re here to assist you in your robotics journey.