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| Both sides previous revision Previous revision Next revision | Previous revision Last revision Both sides next revision | ||
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en:netzer:hc-sr04 [2014/10/03 17:32] svesch [Detecting the distance to an object with an ultransonic sensor] |
en:netzer:hc-sr04 [2014/10/03 17:35] svesch [IO0] |
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| With the capture capability of Netzer a simple ultrasonic sensor like the HC-SR04 module can be used. | With the capture capability of Netzer a simple ultrasonic sensor like the HC-SR04 module can be used. | ||
| - | <imgcaption sensor_photo|Ultrasonic sensor HC-SR04>{{:en:netzer:hc-sr04_front.jpg}}{{:en:netzer:hc-sr04_back.jpg?direct|}}</imgcaption> | + | <imgcaption sensor_photo|Ultrasonic sensor HC-SR04>{{hc-sr04_front.jpg}}{{hc-sr04_back.jpg|}}</imgcaption> |
| For that reason the sensor shall be connected like: | For that reason the sensor shall be connected like: | ||
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| Datasheet of the sensor states that at least 10 µs pulse must be generated to start the measurement. | Datasheet of the sensor states that at least 10 µs pulse must be generated to start the measurement. | ||
| - | <imgcaption labeltext|Configuration of IO3 for trigger>{{io3config_ultrasonic.gif}}</imgcaption> | + | <imgcaption io3_config|Configuration of IO3 for trigger>{{io3config_ultrasonic.gif}}</imgcaption> |
| Due to the ultrasonic sensor has a resolution of about 0.3 cm it is sufficient to configure the resolution to 800 ns. The maximum values to measure (18 meters) are more than enough for the maximum of 3 meters the sensor will return. | Due to the ultrasonic sensor has a resolution of about 0.3 cm it is sufficient to configure the resolution to 800 ns. The maximum values to measure (18 meters) are more than enough for the maximum of 3 meters the sensor will return. | ||
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| IO0 is triggered by the rising edge of the sensor capture signal ECHO. | IO0 is triggered by the rising edge of the sensor capture signal ECHO. | ||
| - | {{io0config_ultrasonic.gif?direct|}} | + | <imgcaption io0config|IO0 configure for starting measurement>{{io0config_ultrasonic.gif}}</imgcaption> |
| Important is to mark the "Impulse timer Reset" checkbox. | Important is to mark the "Impulse timer Reset" checkbox. | ||
