Difference between revisions of "HackerHotel2019Badge/Hardware"
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==Errata== | ==Errata== | ||
===Resistor in the way of flashing=== | ===Resistor in the way of flashing=== | ||
− | We connected our IR receiver to GPIO12 and added a pullup. That caused an issue because by default that pin is a setting for the EEProm voltage selector. During the [[Hh2019sweatshop]] we removed the pullups. We hope to set the pullup in software, but are not sure it will work. In the meantime we also found that | + | We connected our IR receiver to GPIO12 and added a pullup. That caused an issue because by default that pin is a setting for the EEProm voltage selector. During the [[Hh2019sweatshop]] we removed the pullups. We hope to set the pullup in software, but are not sure it will work. In the meantime we also found that we could burn a few fuses so that from now on it just works! |
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===Audiojack reversed=== | ===Audiojack reversed=== |
Revision as of 16:00, 11 February 2019
Mostly a straight up copy of SHA2017Badge with added IR and I2S Audio.
IR
940nm IR transceiver
Audio
I2S PCM5102A DAC
Errata
Resistor in the way of flashing
We connected our IR receiver to GPIO12 and added a pullup. That caused an issue because by default that pin is a setting for the EEProm voltage selector. During the Hh2019sweatshop we removed the pullups. We hope to set the pullup in software, but are not sure it will work. In the meantime we also found that we could burn a few fuses so that from now on it just works!
Audiojack reversed
We made another booboo: the audiojack has some reversed pads. (we accidentaly rotated the footprint)
PCM5102 | 3.5mm Jack |
---|---|
Right | Right |
Left | GND |
GND | Left |
So Left and GND are reversed. This results in a weird sound on headphones. We fixed it partially in software for passive headphones. For active headphones and amplifiers a hardware mod is required, reversing the two pins.