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@ -10,13 +10,15 @@ The latest ECU designed by WTMtronics builds on the UA4C that came before it, an
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- Flyback diodes
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- Reset button
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The reset button was added as the only reset connection made to the microcontroller to prevent unwanted resets from USB connected devices. There is a caveat to this arrangement though. While the first time a firmware is loaded it will go on without intervention, subsequent times will require the user to hold the reset button down then release the button when the program starts the upload process.
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The reset button was added as the only reset connection made to the microcontroller to prevent unwanted resets from USB connected devices. There is a caveat to this arrangement though. While the first time a firmware is loaded it will go on without intervention, subsequent times will require the user to hold the reset button down then release the button when the program starts the upload process. If the upload does not start right away go back and try again.
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The Ocelot uses the Silicon Labs CP2102N USB to UART controller chip. Most modern computers will detect and automatically load a driver for the COM port. If you are not getting the COM port, then you can download drivers from their website [Silicon Labs Drivers](https://www.silabs.com/developers/usb-to-uart-bridge-vcp-drivers).
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Latest version: A3 *First release
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### Errata
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vA3: Labeling for trigger jumpers is reversed. The secondary trigger jumpers are nearest the outside edge of the board, and the primary trigger jumpers are near the trigger conditioner socket.
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vA3:
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- Labeling for trigger jumpers is reversed. The secondary trigger jumpers are nearest the outside edge of the board, and the primary trigger jumpers are near the trigger conditioner socket.
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- Serial numbers prior to 002287 will not operate with out a USB connection if no Bluetooth adapter is attached. If your serial number is 002287 or higher this issue does not affect your unit. If you are affected by this issue, please contact us so we can help you [WTMtronics Help](https://wtmtronics.com/help).
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## UA4C
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The Under Arduino Four Channel was designed to be as small as possible wile still using a standard off the shelf Arduino MEGA and Hammond extruded enclosure. This was achieved by using SMD components and placing the Arduino upside-down on top of the PCB. The unique stacking arrangement allows the unit to be particularly thin for a unit that still uses a separate Arduino MEGA. It is a 4+4 board that incorporates the follow features.
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- Four injector channels
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