The idea for this came when I was completing a Western Blot in lab and was annoyed with how long the procedure was for a relatively basic task. Not only that, but as each was cycle is 5 minutes, there is not enough idle time to do something in the meantime. Thus, this device allows you to complete 1, 2, or 3 wash cycles while not having to replace the wash liquid yourself.
The project was built on a single piece of cardboard. Two syringes used, one as an inlet and one as an outlet. First, string was hot-glued to the plunger of the syringes, the inlet on the top of the plunger and the outlet on the bottom of the plunger.
From there, two cardboard holders for the two syringes were constructed with hot glue as well, making efforts to keep the syringes in place.
The strings were pulled taught and attached to stepper motors in the circuit.
The stepper motors are attached to their own motor drivers, which are controlled by the PocketBeagle. From there, the pocket beagle also controls the 7 segment display and gets input from the two buttons.
The motors are connected to a 5 V power supply through the motor driver, though the motor can be used with up to a 12 V power supply in order to provide more torque.
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