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wcore_usb [2017/09/09 10:20] latigid_on [BOM v1.0 (plceholder)] |
wcore_usb [2017/09/09 10:47] latigid_on |
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===== Schematic ===== | ===== Schematic ===== | ||
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+ | Both USB connectors are wired to the 1*5 J1 header via low-value resistors. There is a TVS diode on the underside that should help a bit with ESD. One side of the toggle switch sets the ID pin low, meaning the Core should respond as a USB host. In this case, it is expected that the USB B socket supplies power only. The host port would then be the USB A socket. J7 must be closed to supply power from the main USB buss to any slave device on the USB A side. If the slave has its own power supply, then leave J7 open. | ||
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+ | Headers J3-6 are wired to +5V, so this is a good point to connect power-hungry parts like displays or LEDs. | ||
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+ | The left-hand side connects to the 3.5mm socket. The idea is to use the tip of a stereo jack as an interface to a gate (i.e. from a modular synth). As the DIN pins normally expect negative-going signals, the classic S-trig converter is applied: | ||
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+ | {{::wcore:usb:strig.png?nolink&400|}} | ||
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+ | To use the socket for another purpose (audio input or output?), feel free to omit the diode and transistor, and to bridge the collector and base pins. | ||
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+ | The ring of the socket is for a normal footswitch closing to 0V/ground and there is a protection resistor in series. | ||