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Stepper Motor Driver Schematic adapted from [17] .

Stepper Motor Driver Schematic adapted from [17] .

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Fig. 1. Block Diagram of Helium Extraction Line Valves 1 -13 are...
Fig. 2. Block Diagram of the solution.
Fig. 3. Flow chart of host computer to microservice API communication flow.
Fig. 4. Valve Driver Schematic.
+2 Fig. 5. A) Bipolar Stepper Motor. B) H-Bridge stop position. C)...
Combining low-cost single board computers with open-source software to control noble gas extraction lines
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  • Dec 2022
Specialised mass spectrometers such as those used in noble gas geochemistry are often controlled by bespoke computer systems that get harder to maintain as, along with their expensive interface cards, they become obsolete. This work explains how bespoke interface cards and obsolete versions of software can be replaced with low-cost single board com...
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... than use discrete MOSFETs which would complicate the circuit, an L6203 integrated driver circuit that contains the HBridge as well as additional thermal protection and driver circuits [17] is used to drive the motor coils. Two integrated circuits per motor are needed, one for each motor coil, and the inputs are connected to opto-isolators to protect the Raspberry Pi ( Fig. 6 ). In order to move the X-Y stage to a sample position, a feedback mechanism is required to inform the system as to the location of the laser in relation to the location of the sample to be processed. ...