enter image description hereenter image description hereI am very interested in this project:

Sonar HC-SR04 analog output. Multipoint Sonar Radar

I have not much experience in electronics and don't know where I have to connect my wire on the Ultrasonic sensor, to read out the analog signal.

Many thanks in advance

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    \$\begingroup\$ Read the documentation in your own link ....it shows you where to connect it. wildlab.org/index.php/ultrasonic-radar-arduino \$\endgroup\$ Commented Oct 24, 2017 at 18:08
  • \$\begingroup\$ I dont´t understand the documentation. Could you circle the "collector of transistor" on my picture? \$\endgroup\$ Commented Oct 24, 2017 at 18:29
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    \$\begingroup\$ It doesn't look like the board in the documentation and the one in your picture are equivalent... \$\endgroup\$ Commented Oct 24, 2017 at 18:58
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    \$\begingroup\$ There is no discrete transistor on your picture... \$\endgroup\$
    – Wesley Lee
    Commented Oct 24, 2017 at 19:22
  • \$\begingroup\$ Ah okay, no I see the difference. The upper picture shows now the used sensor, correct? \$\endgroup\$ Commented Oct 24, 2017 at 19:32

1 Answer 1


The circuit in your picture is not the same one from the link provided. That is probably the source of your confusion.


This is the circuit from that other post:enter image description here

  • \$\begingroup\$ Do you know how I have to connect the wire on my IC? \$\endgroup\$ Commented Oct 24, 2017 at 19:21
  • \$\begingroup\$ Sorry @LarsBomhoff, I can't even see any markings on the IC's in your picture, so I really can't say. Is there a particular reason you want it to be analog? Check out something like this: instructables.com/id/Simple-Arduino-and-HC-SR04-Example \$\endgroup\$
    – SSVT
    Commented Oct 25, 2017 at 16:13

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