{ "ok": true, "data": { "title": "D-0013", "rev_id": 10799, "updated_at": "2021-08-27T10:49:25+00:00", "chunk_count": 12, "chunks": [ { "title": "D-0013", "rev_id": 10799, "heading_path": "", "chunk_index": 0, "content": "# D-0013", "char_count": 8, "token_estimate": 2 }, { "title": "D-0013", "rev_id": 10799, "heading_path": "HC-SR04 Ultrasonic Module", "chunk_index": 1, "content": "
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D_0010_1.jpg<\/figcaption>\n<\/figure>", "char_count": 154, "token_estimate": 39 }, { "title": "D-0013", "rev_id": 10799, "heading_path": "Description", "chunk_index": 2, "content": "Ultrasonic ranging module HC - SR04 provides 2cm - 400cm non-contact measurement function.\nThe ranging accuracy can reach to 3mm.\nThe modules includes ultrasonic transmitters, receiver and control circuit.\n==Basic principle of work==\n\n- Using IO trigger for at least 10us high level signal,\n- The Module automatically sends eight 40 kHz and detect whether there is a pulse signal back.\n- IF the signal back, through high level , time of high output IO duration is the time from sending ultrasonic to returning.\n- Test distance = (high level time×velocity of sound (340M\/S) \/ 2", "char_count": 584, "token_estimate": 146 }, { "title": "D-0013", "rev_id": 10799, "heading_path": "Features", "chunk_index": 3, "content": "- Easy to assemble\n- Compatible with Raspberry Pi and Arduino and so on.\n\n===Specifications==\n\n- Working Voltage DC 5 V\n- Working Current 15mA\n- Working Frequency 40Hz\n- Max Range 4m\n- Min Range 2cm\n- MeasuringAngle 15 degree\n- Trigger Input Signal 10uS TTL pulse\n- Echo Output Signal Input TTL lever signal and the range in proportion\n- Dimension 45\\*20\\*15mm", "char_count": 382, "token_estimate": 96 }, { "title": "D-0013", "rev_id": 10799, "heading_path": "Pin Definitions", "chunk_index": 4, "content": "- 5V Supply\n- Trigger Pulse Input\n- Echo Pulse Output\n- 0V Ground", "char_count": 73, "token_estimate": 19 }, { "title": "D-0013", "rev_id": 10799, "heading_path": "Dimension", "chunk_index": 5, "content": "\"D_0010_9.jpg\"\n==Timing Diagram== The Timing diagram is shown below. You only need to supply a short 10uS pulse to the trigger input to start the ranging, and then the module will send out an 8 cycle burst of ultrasound at 40 kHz and raise its echo.\nThe Echo is a distance object that is pulse width and the range in proportion .\nYou can calculate the range through the time interval between sending trigger signal and receiving echo signal.\n\nFormula: uS \/ 58 = centimeters or uS \/ 148 =inch;\n or: the range = high level time * velocity (340M\/S) \/ 2\n\nwe suggest to use over 60ms measurement cycle, in order to prevent trigger signal to the echo signal.\n\"TimingUltrasonic.jpg\"\n==Gallery==", "char_count": 834, "token_estimate": 209 }, { "title": "D-0013", "rev_id": 10799, "heading_path": "Dimension", "chunk_index": 6, "content": "| | | |\n|--------------------------------------------------------------------------------|--------------------------------------------------------------------------------|--------------------------------------------------------------------------------|\n|
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D_0010_6.jpg<\/figcaption>\n <\/figure> |", "char_count": 797, "token_estimate": 200 }, { "title": "D-0013", "rev_id": 10799, "heading_path": "Package Includes", "chunk_index": 10, "content": "- 5 x Ultrasonic sensor\n\n\"D-0013-HC-SR04超声波模块-5个一组.jpg\"\n==How to use==\n\n- Distance Sensing With Raspberry Pi and HC-SR04: \n- Raspberry- Pi (On-board computer) based Intelligent:\n- holiday-special--santa-trap: ", "char_count": 598, "token_estimate": 180 }, { "title": "D-0013", "rev_id": 10799, "heading_path": "Keywords", "chunk_index": 11, "content": "- Ultrasonic sensor, distance sensor, Raspberry Pi 4B, arduino", "char_count": 64, "token_estimate": 16 } ] } }