wcore_usb
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wcore_usb [2017/09/08 06:17] – latigid_on | wcore_usb [2017/09/09 10:47] – latigid_on | ||
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===== Schematic ===== | ===== Schematic ===== | ||
+ | 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. | ||
+ | Headers J3-6 are wired to +5V, so this is a good point to connect power-hungry parts like displays or LEDs. | ||
+ | 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: | ||
- | ===== BOM v1.0 (plceholder) | + | {{:: |
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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. | ||
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+ | ===== BOM v1.0 ===== | ||
^Type | ^Type | ||
- | ^Resistors^^^^^^^^^^ | + | ^Resistors^^^^^^^^^^ |
- | | |4 |~1k 5% |THT |R1-4 | | | | |depends on LEDs | | + | | |2 |22R 5% |1206 |R1, R2 | | | | | | |
- | ^Capacitors^^^^^^^^^^ | + | | |
- | | | + | | |2 |10k 5% |THT |R4, R5 | | | | | | |
- | ^LEDs^^^^^^^^^^ | + | ^Diodes^^^^^^^^^^ |
- | | |1 |Green |2*3*4 | | | | |eBay |use whatever colours | + | | |
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- | | | + | ^Transistor^^^^^^^^^^ |
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^Switch^^^^^^^^^^ | ^Switch^^^^^^^^^^ | ||
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^Headers^^^^^^^^^^ | ^Headers^^^^^^^^^^ | ||
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^Sockets^^^^^^^^^^ | ^Sockets^^^^^^^^^^ | ||
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^Hardware^^^^^^^^^^ | ^Hardware^^^^^^^^^^ | ||
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===== Versions ===== | ===== Versions ===== |
wcore_usb.txt · Last modified: 2018/12/18 09:36 by latigid_on