Store Forums Lumazoid General Discussion Prog-JP1

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  • #8365

    What is the function of SJ1 jumper?


    By default the VCC line on the 6-pin programming header is not connected to the board VCC signal. This is to ensure that someone wishing to program the board does not accidentally drive an LED strip from a USB power source. So to program the device, it forces the user to connect the real power supply to the 2.1mm jack as well as the 6-pin serial connection.

    BUT if you want to override that and ensure you don’t have LEDs connected when programming over USB-serial, then you can connect the jumper. This will connect the serial VCC line to the board.

    Make sense?

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