qi-hardware/antorcha
1
0
Fork 0
mirror of git://projects.qi-hardware.com/antorcha.git synced 2024-12-22 18:15:11 +02:00
Code

tornado/doc/README: calculate image size

Browse Source
This commit is contained in:
Werner Almesberger 2012-12-19 14:11:42 -03:00
parent 2dc2fb278c
commit 1c672a640c
1 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
tornado/doc/README
View File

@ -54,3 +54,13 @@ test firmware. CH2 (blue) is signal entering the first LED module,
CH1 (yellow) is the signal exiting the last module. The absence of
degradation in a 250 ns pulse suggests that we can go as fast as the
MCU is able to.
Image size
----------
With a radius of 80 cm the circumference is roughly 5000 mm.
In order to obtain square pixels at the outer radius, we therefore
need 1000 lines per rotation, irrespective of speed. Each line
consists of 64 pixels or 8 bytes of data. Therefore, the full disc
needs roughly 8 kB of data while a quarter disc needs 2 kB.