NanoAssySchematic-ScopeV5 01-15-19 pg7-7.pdf

Page 7 of the entire project. The Arduino Nano circuit card assembly. Since this portion will of the project will exclusively communicate with an ASCOM driver, it has its own dedicated USB interface. The Arduino Mega has its own USB interface.

The hardware component count is kept low, with the help of code. The Arduino stepper library is used to energize the appropriately coils. N channel FETs with logic level Vgs thresholds are used to individually energize the stepper coils, keeping the part count and stepper driver cost low. In the code, to reduce coil heating when not moving, the digital outputs drive each gate low sending each FET to an open drain state. When a movement command is received, the gates are returned to their previous state before using the stepper library.

Adobe Portable Document Format - 30.84 kB - 01/25/2019 at 13:14

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Scope_setup_diagram.pdf

Functional block diagram

Adobe Portable Document Format - 26.55 kB - 01/18/2019 at 00:39

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