SRF05 Ultrasonic Rangefinder
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A very low cost ultrasonic rangefinder for measuring distances
between 1cm and 4m.
The SRF05 requires a short 10us pulse to the trigger input to
start ranging. The module then sends out an 8 cycle burst of ultrasound
at 40kHz and raises its echo line high. It then listens for an echo,
and as soon as it detects one it lowers the echo line again. The
echo line is therefore a pulse whose width is proportional to the
distance to the object. By timing this pulse with your controller
it is possible to calculate the range.
Please note that unlike the
SRF10 and
SRF08 ultrasonic
rangefinders the SRF05 does not support I2C communications.
Examples of using the SRF05 module with a wide range of popular
controllers may be found
here.
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Technical Data
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| Voltage |
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5V |
| Current |
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4mA typical |
| Frequency |
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40KHz |
| Range |
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1cm-4m |
| Modes |
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Single pin for trigger/echo or 2 pin SRF04
compatible |
| Input Trigger |
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10us minimum TTL level pulse |
| Echo Pulse |
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Positive TTL level signal, width proportional
to range |
| Dimensions |
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43mm x 20mm x 17mm height |
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16x2 Serial LCD
