59 lines
2.0 KiB
Markdown
59 lines
2.0 KiB
Markdown
v3
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changes:
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- more appropriate LED resistor values
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- change LED meaning
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- use only PDM mic
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- replace ESP32-S2 with ESP32 for PDM support, and better WLED support
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- make USB optional (only needed for debug)
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- add one I/O to port (allowing 3-line protocols like SPI or I2S)
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- change input capacitors (for manufacturability)
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v2
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fixes:
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- ESP antenna not surrounded by copper
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changes:
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- use larger barrier terminal for power ports to carry more current, clamp more wires, and allow wiring when the board is mounted in the enclosure
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- remove 5V jack to save space, 5V power can be provided by USB port, and to avoid plugging 8-60V into 5V port (frying all the electronics)
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- add board hole to fit in other enclosure version
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- use ESP32-S2-MINI instead of WROOM to save space and avoid Not Recommended for New Design part
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- use top spring terminal for LED data wires so they can be inserted when the board is mounted in the enclosure
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- add status LED and change LED meanings
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- complete re-layout, more compact
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- add I²S and PDM MEMS microphone (I²S is present because I did not test PDM yet)
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v1
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fixes:
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- both pins of the spring terminals are connected
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changes:
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- use screw terminal for power input/output to support more current
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- add power input protection: PPTC and reverse polarity
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- add switch configure DMX512 line termination (loop back to D2 so the XLR chain can continue, end using a termination resistor, or continue forwarding to other port
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- change DC-DC buck converter to TPS54560 for large input voltage (e.g. 48V power supply and batteries)
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issues: all the same as v0
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v0
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first prototype, with the bare features
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issues:
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- the case has actually other mounting holes
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- WiFi does not work because of missing [copper clearance around the antenna](https://espressif.com/sites/default/files/documentation/esp32-s2_hardware_design_guidelines_en.pdf).
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- KF141R footprint is not long enough (not really an issue)
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- LED cables need to be stripped ~ 10 mm to fit it KF141R (minor inconvenience)
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