We have moved to a new Sailfish OS Forum. Please start new discussions there.

Other Half projector [not relevant]

asked 2014-02-23 21:19:09 +0300

R. gravatar image

updated 2014-06-17 12:40:01 +0300

eric gravatar image

It would be nice to have an other-half projector so you can, for example, show your photos to people or make a presentation without the need to plug any cable. There are some tiny projectors such as the Pico, so it would not mean having a big other-half.

edit retag flag offensive reopen delete

The question has been closed for the following reason "question is not relevant or outdated" by Spam Hunter
close date 2020-03-26 21:26:10.352621


Very useful as an TOH! Perfect to swap in when you want to use the projector, but it doesn't have to be on all the time. And it can change your settings to presentation-suitable (turn off screen-blank, maybe start a clock, etc) when you put on the projector TOH.

00prometheus ( 2014-02-24 01:51:49 +0300 )edit

there was already discussion about video-out TOHs and that it is not possible afaik (bandwidth of the i2c), you could stream video to a projector via WLAN but that's about it I guess.

chemist ( 2014-02-24 11:58:45 +0300 )edit

I never understood that way of thinking. Streaming video over wlan is old news, why should we forget about that just because we also have the i2c bridge? Use the i2c for setting up communication only, then move bulk data over wlan.

00prometheus ( 2014-02-24 14:09:41 +0300 )edit

1 Answer

Sort by » oldest newest most voted

answered 2014-02-24 13:25:45 +0300

Cmdr_Zod gravatar image

This is impossible due to the speed limitations of i2c (400kbit/sec). The very low quality QVGA (320x240pixels) would need 44'000kbit/sec at 24 frames per second with 24bits color depth.

It is not even fast enough for static images with decent quality.

edit flag offensive delete publish link more



You don't need to limit yourself to i2c for communications! Streaming video over wlan is an everyday activity.

00prometheus ( 2014-02-24 13:40:22 +0300 )edit

Yeah, I don't understand why people go on about i2c either. We live in a world where even power can be transferred wirelessly, why do communication between Jolla and TOH have to be wired? Even the stock TOHs use NFC to identify themselves, not i2c. The TOH only needs to be wired to the phone for power, not for data. Bluetooth or WLAN would probably both work.

ovekaaven ( 2014-02-25 06:34:44 +0300 )edit

If you use WLAN you can just use a separate device (with its own Battery) and you have the comfort of holding the Jolla independent of the projectors position.

A faster electric connection between the other half and the phone would be nice, but I can't tell what would be best. Wireless is suffering from higher power consumption and sometimes crowded frequency spectrum..

Cmdr_Zod ( 2014-02-25 10:38:56 +0300 )edit

Thank you for the clarification on the i2c. Still I also had in mind other connections (is micro USB usable by the way?) and next device. I had a tag for that.

R. ( 2014-03-22 23:06:43 +0300 )edit

The device has no USB host capability in its current implementation. USB could be a choice in future versions for the other half, but I don't know if there is a suitable connector for the other half (Micro-USB probably needs to much depth in the phone for usage in the other half)

Cmdr_Zod ( 2014-03-23 00:27:21 +0300 )edit

Question tools

1 follower


Asked: 2014-02-23 21:19:09 +0300

Seen: 327 times

Last updated: Feb 24 '14