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doc: add limitations

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King Kévin 2023-09-27 04:13:00 +02:00
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@ -15,6 +15,38 @@ It allows to:
usage
=====
limitation
==========
Features I already implement:
- daisy chain capability (providing data and power)
- built-in power 5V power supply (input up to 36V, output up to 5A)
- RS-485/DMX512 interface (not isolated)
- RJ45 port, providing power and data, 2x for chaining capability
- RJ45 individual wires connector, using easy to use spring loaded terminal, for allowing using Ethernet cable in waterproof enclosure, where the 8P8C connector does not fit through the PG7 cable gland
- DC barrel jack power input, for 5V and 8-36V, for convenient use with power bricks, allowing injecting power
- power wire connectors, as alternative to the barrel jack, for larger power supplies and usage in waterproof enclosure
- proper 5V DOUT for WS2812B IC input, 5 channels (can be combined for LEDs requiring an additional clock signal)
- external WiFi antenna port, by using the I variant of the ESP32-S2-WROOM, with appropriate connector
- PCB fitting in [sonoff waterproof enclosure](https://www.sonoffegypt.com/products/sonoff-ip66-waterproof-case)
Features I might implement:
- microphone/line in for sound reactive (use [ESP32-LyraT-Mini](https://docs.espressif.com/projects/esp-adf/en/latest/design-guide/dev-boards/board-esp32-lyrat-mini-v1.2.html) design as reference)
- RDM support (mostly software support)
- automotive fuse protection
- high voltage input (up to 60V, using TPS54560DDAR)
- reverse polarity input protection (but not output)
Features I will not add:
- XLR DMX512 connectors: they take too much space and I never know if I should use the 3 or 5-pin variant. Instead I will design a separate DMX + power injector splitter board
- full isolation: not really needed as the devices should be chained with a single power supply, preventing any ground potential difference. The splitter board will provide isolation, at the beginning of the chain.
- USB Power Delivery: this is just a convenience feature, but using expensive lower power USB chargers is not ideal for the intended usage (festival installation)
- Lithium battery input and charger: it does not fit the intended usage, with large external power supplies providing enough power for power hungry LED strips. Small batteries would not be able to handle that over longer time. You can still use the 5V power input though, and charge the battery separately
background
==========
@ -70,7 +102,7 @@ A solution would be to control modes instead of individual LEDs.
features
--------
Here a wish list of features in decreasing order:
Here a wish list of features I began with, in decreasing order:
- daisy chain capability (providing data and power)
- built-in power 5V power supply (input up to 30V)