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HC-SR04 Ultrasonic Sensor

Selling Price
RM 4.10
Original Price
RM 4.90
Discount Rate
16% OFF
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Sold by Autobotic Sdn Bhd

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Specification

  • Use voltage: DC5V
  • Static current: Less than 2mA
  • Level output: High-5V
  • Level output: Low 0V
  • Sensor angle: Not more than 15 degrees
  • Detection distance: 2cm-450cm
  • High precision: Up to 3mm

 Module wiring

  • VCC 5V power connection
  • Trig (control side) connected microcontroller IO port
  • Echo (receiving end) connected microcontroller IO port
  • GND Ground Ground

 

The principle of ultrasonic distance measurement

Ultrasound is a relatively high frequency sounds, the strong point of ultrasonic distance measurement is the use of ultrasonic wave propagation velocity in air is known, measuring wave reflected by an obstacle encountered after the launch back in time, according to the transmitting and receiving The time difference calculating the emission point of the actual distance to the obstacle. Thus, the principle of ultrasonic distance measurement principle is the same with the radar.

Ranging of formula: L = C*T

Where L is the length of the distance measurement; C of the ultrasonic propagation velocity in air; T for measuring the distance the propagation time difference (T is transmitted to the receiving time half the value).

Known ultrasonic velocity C = 344m / s (20 C ambient temperature)

Ultrasonic propagation velocity error

Ultrasonic propagation velocity affected by the density of the air, the higher density of the air, the faster the ultrasonic wave propagation, and the density of the air temperature has a close relationship with the approximate formula: C = C0 +0.607 * T C

Where: C0 is zero when the acoustic velocity 332m / s;

T is the actual temperature (C).

For ultrasonic ranging accuracy required to achieve 1mm, we must take the ambient temperature of the ultrasonic propagation into account.

Fourth, the module works

(1) The IO trigger distance, high-level signal to at least 10us;

(2) the module automatically sends eight 40khz square wave, automatically detects whether a signal return;

(3) a signal back, through the IO outputs a high level, high duration is Ultrasonic time from launch to return. Test distance = (time * High speed of sound (340M / S)) / 2;

Fifth, the module uses the method

A control port made a high of more than 10US, you can wait to receive high output port. One has

Output can open the elapsed timer, when this port goes low when you can read the timer value, this time on the time for this distance, only calculate the distance. This constant cycle of measurement, you can reach your The value of the mobile






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Basic Information

Basic Information of Product
Product Status/Sales Type New Product No. 413944
Weight (KG) 0.017 kg Country of Origin N/A
Shipping Method Courier Service
GST Applicable Not Applicable (Non-GST seller)
After Sale Service
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        Notice on Return/exchange All items purchased online through Autobotic Solution are returnable. If for any reason you would like to return the Goods for an exchange or refund please email us at sales@autobotic.com.my. We will use all reasonable efforts to respond to you within 24 business hours. Can I make a return to you? 1.1 Please notify us within 7 days of receiving your order if you would like to return an item. The item must be returned to use in the condition as supplied to you so please repack it with care using all of the original packaging or a suitable alternative. As the Goods are your responsibility until they reach us please ensure you package your return to prevent any damage to the items or boxes. This does not affect your statutory rights. 1.2 You will be given the option to have the item replaced (if available) or to be refunded through the payment method used by you when purchasing the Goods. Replacements will be issued upon our receipt of the returned Goods. Items must be returned in their original condition with all packaging and documentation. You are responsible for the return package and all associated posting costs unless you received such items damaged. The items need to be received back to us within 28 days of receipt of the package by you. We do advise that you obtain a certificate of posting from the Royal Mail in case the parcel (for whatever reason) fails to reach us. 1.3 We will use all reasonable efforts to issue a refund within 10 working days but, in any event, no later than 30 calendar days after receipt of the returned Goods. We regret that additional costs such as shipping cost and gift-wrapping cannot be refunded. 1.4 Please note that refunds on items bought as gifts can only be issued to the original purchaser. If you decide to exchange an item then unfortunately we cannot stop the original purchaser from knowing. Can I cancel my order? 2.1 You can cancel your order at any time prior to your order being processed. Please be aware that orders are usually processed on the same day they are received. Please email sales@autobotic.com.my with your address and order reference number. 2.2. You also can withdraw from the order at any time after it has been dispatched but you must notify us within 7 working days of receipt of the items. Please email sales@autobotic.com.my with your address and order reference number. 2.3 Items must be returned in their original condition with all packaging and documentation. The items need to be received back to us within 28 days of receipt of the package by you. We do advise that you obtain a posting with tracking number in case (for whatever reason) the parcel fails to reach us. 2.4 We will use all reasonable efforts to issue a refund within 10 working days but, in any event, no later than 30 calendar days after receipt of the returned Goods. Please note that you are responsible for the return package and for all postage costs and we regret that additional costs such as express delivery and gift-wrapping cannot be refunded. We reserve the right to refuse to issue a refund or replacement and to recover the cost of returning or collecting the Goods in the event that the Goods are found to have suffered damage after delivery or have been misused or used other than in accordance with the instructions or if the problem is due to normal wear and tear or if the Goods have not been returned with its original packaging. This does not affect your statutory rights.

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