wcore_usb
Differences
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wcore_usb [2017/09/09 09:42] latigid_on [BOM v1.0 (plceholder)] |
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: | ||
| + | {{::wcore:usb:strig.png?nolink&400|}} | ||
| - | ===== BOM v1.0 (plceholder) ===== | + | 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 ^Qty ^Value ^Package ^Parts^Mouser^Reichelt^Conrad^Other^Notes^ | ^Type ^Qty ^Value ^Package ^Parts^Mouser^Reichelt^Conrad^Other^Notes^ | ||
| ^Resistors^^^^^^^^^^ | ^Resistors^^^^^^^^^^ | ||
| - | | |2 |22R 5% |1206 |R1, R2 |R1, R2 | | | | | | + | | |2 |22R 5% |1206 |R1, R2 | | | | | | |
| | |1 |330R 5% |1206 |R3 | | | | | | | | |1 |330R 5% |1206 |R3 | | | | | | | ||
| | |2 |10k 5% |THT |R4, R5 | | | | | | | | |2 |10k 5% |THT |R4, R5 | | | | | | | ||
| Line 26: | Line 38: | ||
| | |1 |1N4148 |THT | | | | | | | | | |1 |1N4148 |THT | | | | | | | | ||
| | |1 |TVS |SOT-143 |TVS1 |PRTR5V0U2X,215 | | || | | | |1 |TVS |SOT-143 |TVS1 |PRTR5V0U2X,215 | | || | | ||
| + | ^Transistor^^^^^^^^^^ | ||
| + | | |1 |BC337 |TO-92 |T1 | | | | | | | ||
| ^Switch^^^^^^^^^^ | ^Switch^^^^^^^^^^ | ||
| | |1 |SPDT | |SW1 |1101M2S3AV2BE2 |SS 13LSP | | |Mouser one is better quality | | | |1 |SPDT | |SW1 |1101M2S3AV2BE2 |SS 13LSP | | |Mouser one is better quality | | ||
| | | | | | |1101M2S4AV2BE2 | | | |Longer actuator (recommended). | | | | | | | |1101M2S4AV2BE2 | | | |Longer actuator (recommended). | | ||
| ^Headers^^^^^^^^^^ | ^Headers^^^^^^^^^^ | ||
| - | | |1 |2*8 |**SMT** male | | | | | |could use a longer strip | | + | | |1 |1*2 | male | | | | | | | |
| + | | |5 |1*3 | male | | | | | | | | ||
| + | | |1 |1*5 | male | | | | | |or wire directly | | ||
| ^Sockets^^^^^^^^^^ | ^Sockets^^^^^^^^^^ | ||
| - | | |1 |SD | |SD-RSMT-2-MQ | | | | | | | + | | |1 |USB B |horizontal |USB1 |538-67068-7041 |USB BW | | | | |
| + | | |1 |USB A |upright |USB2 |538-89485-8000 | | | | | | ||
| + | | |1 |3.5mm | |SOCK1 |CUI SJ1-3535NG | | | |other variants are possible (different pins switched etc.) | | ||
| ^Hardware^^^^^^^^^^ | ^Hardware^^^^^^^^^^ | ||
| - | | |2 |M3 Spacer |5mm(?) | | | | | | | | + | | |2 |M3 PCB mount| |534-7695 | | | | | | |
| ===== Versions ===== | ===== Versions ===== | ||
wcore_usb.txt · Last modified: 2018/12/18 09:36 by latigid_on
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