![]() ![]() * high-current high-side switch for snap switches, structure lighting, or CC LEDs (multiple series LEDs also supported) * high current low-side switch for snap switches, structure lighting, or CA LEDs (multiple series LEDs supported) * direct LED drive at 5V with slots for current limiting resistors (both CA and CC supported) 16 additional output lines with four different options: 8 lines for driving 4 tortoises, 8 medium-current 12V outputs, or 8 high-current 12V outputs (depending on driver chip populated). 16 input lines (active low) for buttons or block detectors screw terminals or 10-pin ribbon cable (selectable). I stuffed a number of peripherals onto the Dev Kit, expecting that different users will populate whichever and however many they want from these. The processor boards come with various chips, and a number of them have plenty of flash and RAM available for advanced functionality - 256K to 2M of flash and 32K to 512K of RAM is available in the $11-$24 price range. This is a dev kit based on the STM32 Nucleo processor board, which is inexpensive, and compatible with both Arduino libraries as well as OpenMRN. Nucleo-F767ZI with 2M flash, 512K ram and ethernet (this is larger and needs modification). Nucleo-F303RE with 512K flash and 80K ram Nucleo-F091RC with 256K flash and 32K ram It needs an STM32 Nucleo-64 board plugged into it to operate. The IO board does not contain a microcontroller. It drives model railroad peripherals such as turnouts, signals, pushbuttons, block detectors, etc, and uses the NMRA standard LCC connection via CAN-bus to control and interact with other peripherals or a computer. This project is an IO board for controlling model railroad layouts. ![]()
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