[Martin] sent in a great guide to a simple Arduino based theremin. It’s a very small build – just a single common IC and some passive components – and easy enough to build in an afternoon. The ...
His hardware hack of the SR04 made this a software problem which he also managed to solve! [Clint] was working with the Arduino library, based on the Parallax PING, which uses a single pin for trigger ...
This is an Arduino-based Proximity Sensor circuit wired using the popular HC-SR04 Ultrasonic ranging module,used here for non-contact object detection purpose. The HC-SR04 module includes ultrasonic ...
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