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Expander gate output

doctea·usb_midi_clocker_hardware·expander_gate_output/expander_gate_output.kicad_pcb

Expander gate output PCB layout, top view — open source board by doctea

About the Expander gate output PCB

Expander gate output is an open source PCB design by doctea, published on GitHub. It is a 2-layer board measuring 40.3 × 128.5 mm, with 115 components from 20 distinct parts.

Other key parts include the TXS0108EPW and MCP23S17_SS. By type, the board carries 48 diodes, 32 resistors, 10 connectors, 5 capacitors and 3 ICs.

It belongs with the audio designs in this gallery.

From the project

IMPORTANT: DO NOT USE THESE FOR ANYTHING YET, THEY ARE VERY MUCH PROTOTYPES AND HAVE SOME PROBLEMS!!!!

IMPORTANT: DO NOT USE THESE FOR ANYTHING YET, THEY ARE VERY MUCH PROTOTYPES AND HAVE SOME PROBLEMS!!!!

Files for PCB modules for use by usbmidiclocker project.

- IMPROVE: reduce size of jack holes to make a snugger fit with less wobble? - IMPROVE: Some nice panel graphics!

- DONE: FIX: Replace the voltage regulator with one that will actually be able to deliver enough amps to power the screen and Teensy facepalm - ~~Can work around this for the moment by connecting directly to 5v Eurorack power with eg Dupont cables~~ - FIX: Fix/bridge/remove power diode that prevents power from USB going…

Main components on the Expander gate output

TXS0108EPWMCP23S17_SS

Expander gate output bill of materials (BOM)

115 components, 20 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
TXS0108EPW
U1, U2
1
MCP23S17_SS
U3
1
Output_A_Connector_Backboard
J1
1
Output_B_Connector_Backboard
J2
1
Output_A_Connector_Frontboard
J3
1
Output_B_Connector_Frontboard
J4
1
Eurorack power
J5
1
CS_SELECT
J6
1
5V selector
J7
1
ADDR0
J16
1
ADDR1
J17
1
ADDR2
J18
1
16 pin header
GATE_SPI_OUTPUT_EXPANDER1
2
~
JACK1, JACK14
14
fuzzySI_thonkiconn
JACK2, JACK3, JACK4, JACK5, JACK6, JACK7, JACK8, JACK9 +6
32
BAT43
D1, D2, D3, D4, D5, D6, D7, D8 +24
16
LED
D17, D18, D19, D20, D21, D22, D23, D24 +8
5
C_Small
C1, C2, C5, C6, C7
16
47K
R1, R3, R5, R7, R9, R11, R13, R15 +8
16
1K
R2, R4, R6, R8, R10, R12, R14, R16 +8

Expander gate output design files

The KiCad project lives in the doctea/usb_midi_clocker_hardware repository on GitHub; these links point at the commit this page was built from.

Expander gate output: common questions

How big is the Expander gate output PCB?

The Expander gate output measures 40.3 × 128.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Expander gate output?

115 components, from 20 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Expander gate output design files?

From the doctea/usb_midi_clocker_hardware repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Expander gate output design in my own project?

The repository has no license, so all rights stay with doctea. Use it as a reference, and ask the author before reusing the design.

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