DATASHEET SRF04 PDF

This project started after I looked at the Polaroid Ultrasonic Ranging module. It has a number of disadvantages for use in small robots etc. The SRF04 was designed to be just as easy to use as the Polaroid sonar, requiring a short trigger pulse and providing an echo pulse. Your controller only has to time the length of this pulse to find the range. The connections to the SRF04 are shown below:. The SRF04 Timing diagram is shown below.

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Technical Specification. This project started after I looked at the Polaroid Ultrasonic Ranging module. It has a number of disadvantages. The maximum range of The current consumption, at 2. The mA quiescent current is also far too high. The minimum range of 26cm is useless. The module is quite large to fit into small systems, and.

The SRF04 was designed to be just as easy to use as the Polaroid sonar, requiring a short trigger pulse and. Your controller only has to time the length of this pulse to find the range. You only need to supply a short 10uS pulse to the trigger input to. The SRF04 will send out an 8 cycle burst of ultrasound at 40khz and raise its echo line high.

The echo line is therefore a. By timing the pulse it is possible to calculate the. If nothing is detected then the SRF04 will lower its echo line. Here is the schematic, You can download a better quality pdf k version srf1.

Download SRF04 Datasheet. It has a number of disadvantages for use in small robots etc. The module is quite large to fit into small systems, and 6. The SRF04 was designed to be just as easy to use as the Polaroid sonar, requiring a short trigger pulse and providing an echo pulse. The connections to the SRF04 are shown below: www. 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.

If nothing is detected then the SRF04 will lower its echo line anyway after about 36mS.

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