| Sonar is like radar but uses sound waves instead of radio waves. Sound doesn’t allow for the range of radar signals, but it is a great alter...
| Sonar is like radar but uses sound waves instead of radio waves. Sound doesn’t allow for the range of radar signals, but it is a great alter...
| PIR-controlled presence detection solutions are popular, but they don't detect stationary bodies. This DIY radar-controlled project is a han...