I purchased one of each of these cheap sensors recently from aliexpress for testing purposes. Compared with the ubiquitous HC-SR04 (*), I liked the idea of having a combined emitter/receiver, i.e.

Strictly speaking, a Theremin uses a pair of antennae that act as capacitors in a specific R/C circuit. Looking at ...

The map below shows the location of Gujrat and Karachi. The blue line represents the straight line joining these two place. The distance shown is the straight line or the air travel distance between ...

More than 150 legal cannabis dispensaries across the state are being told they’ll have to shut down because of an error in how the state measured their proximity to ...