Wednesday 31 August 2016

arduino - Sonar HC-SR04 analog output. Multipoint Sonar Radar


Im working on replicating the work found on Ultrasonic Radar; Multi-Point. It bypasses the echo out on HC-SR04 and enables full analog output to Arduino ADC. The results are quite good but unlike the project described on the website, anything further than cca 20 cm is noise. Any ideas why?


used 4.6k ohm resistor 2x 4.7nF capacitors


Thanks,


What I get enter image description here




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