Arduino Programming the HC-SR04 Project Circuit Diagram
Circuit diagram for the Arduino HC-SR04 programming projectIf you want to be able to examine the waveforms produced by this and other projects then get a copy of my book: Sound Card Oscilloscope and build yourself some very capable test gear. 
Distance finder circuit diagram See the full range of Arduino products 
You just need 4 jumper wires to connect this up. I used an old piece of ribbon cable that I had lying around. I stripped off the ends, soldered half an inch of solid wire on the end then covered the joint with some sleeving. It works well but it can be very tedious making the cables. By the time I had finished I told myself that I wasn't going to do that again and ordered up some ready made jumper cables to use next time. I used 4 solid wires to bridge the center gap in the breadboard and that's all you need to do. On the next page you can download the software that you need.
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Comments (13)
is it possible that the only working pin for Echo signal is 2?
Why can't I put it on a random digital input, since the interrupt is generated by the timer?
Juan Alberto
for my lesson i need your code .
can you send it for me please.
i observe publisher's rights, and introduce your site to my friends.
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