Abstract: The subject matter described herein includes methods, systems, and computer program products for determining an ammunition round count by resistive encoding. According to one embodiment, a system for providing an indication of a number of rounds of ammunition in a magazine of a firearm includes a follower for the rounds to rest upon, where the follower is internal to the magazine and pushes the follower and the rounds toward a mouth of the magazine to facilitate feeding the rounds into the firearm. The system also includes a resistive strip membrane potentiometer sensor arranged substantially along a length of the magazine that generates an output voltage when a first and a second circuit are connected by applying pressure to a surface of the sensor. The output voltage varies based on a position where the pressure is applied to the surface of the sensor and the first and second circuits are connected.

Abstract: The subject matter described herein includes methods, systems, and computer program products for determining an ammunition round count by resistive encoding. According to one embodiment, a system for providing an indication of a number of rounds of ammunition in a magazine of a firearm includes a follower for the rounds to rest upon, where the follower is internal to the magazine and pushes the follower and the rounds toward a mouth of the magazine to facilitate feeding the rounds into the firearm. The system also includes a resistive strip membrane potentiometer sensor arranged substantially along a length of the magazine that generates an output voltage when a first and a second circuit are connected by applying pressure to a surface of the sensor. The output voltage varies based on a position where the pressure is applied to the surface of the sensor and the first and second circuits are connected.