Abstract: A system and method for an interface reading ion-selective probes through a device with an audio input with stereo output and mono microphone inline input. Using this interface, multiple probes with different voltage ranges can be handled using one output speaker line to control offset while the other controls gain on the signal from the probe. The output from the interface is read and interpreted via the microphone bidirectional input of the device with the audio port. Furthermore, by reading the microphone input, the device with the audio port auto-calibrate and auto-range fear maximum resolution for the microphone's given dynamic range by adjusting the output fix the two speaker lines, the offset and gain.

Abstract: A Y-Shaped Garbage and Recyclables Separating Disposal System that consists of a top with two chutes attached to each other at an angle and a stand supporting a foot pedal on the floor, and two containers. One of the containers stores garbage, and the other, attached to the recyclables chute, for recyclables. The drop chute and the recyclables chute are attached to each other forming an upside down “Y” (referred to as “Y-Shaped chute”). The drop chute is vertical allowing anything drop into it to go through it without any obstacle. The recyclables chute is attached to the drop chute at an angle in the middle of the drop chute. The recyclables chute is normally blocked by a blocker not allowing garbage to go into the container for recyclables. The blocker is operated by a foot pedal that is attached to a vertical stand by a hinge and a spring and connected with the blocker by a spring. To deposit recyclables, the foot pedal is pressed down.