5 ms·
According to this Q&A, about 55-150 mA is available on a 5V line: http://www.hdmi.org/learningcenter/kb.aspx?c=13#42 http://www.hdmi.org/learningcenter/kb.aspx?
by rzzzt 11y ago
According to this Q&A, about 55-150 mA is available on a 5V line: http://www.hdmi.org/learningcenter/kb.aspx?c=13#42 http://www.hdmi.org/learningcenter/kb.aspx?c=13#42
- bduerst 11y agoYep - the chromecast pulls too much juice (up to 1A) for the HDMI power spec. 1A would be the sweet spot for future HDMI specs.
- agumonkey 11y agoOh I didn't know it was in spec. Also, it's just in range for a pi zero. How convenient.
- bduerst 11y agoThe USB-powered XBox controller is going to need another 300 mA. I also don't think the pi zero has a powerable HDMI adaptor.
- agumonkey 11y agoI had a pi zero hdmi dongle in mind without a supplementary usb cable.
- MiguelHudnandez 11y agoAn on-board battery or capacitor could help to smooth out brief high power tasks, but I don't think it will be able to sustain video decoding & playback at a constant supply of 150mA. I'm really excited for that to be a possibility though, so I hope I'm wrong. Of course, some TVs might dump a lot more current over the connection, just like what was common with USB 2.0 going well over 500mA.
- mikepavone 11y agoThat's on source devices, which in this case would be the Pi Zero. AFAIK, sink devices like a TV do not supply power.
- rzzzt 11y agoI somehow managed to miss the sentence entirely where this is explained (it is used for reading EDID from a connected display). Thanks for the correction!