#robotics Logs

Feb 06 2019

04:07 AM polprog: rue_shop1: having 4 xors you can make up two xnors
04:12 AM polprog: s/up//
08:39 AM jaycharles: anyone around with anki-overdrive system experienec?
03:33 PM rue_shop1: hi
03:34 PM rue_shop1: It occured to me yesterday that due to the complex nature of an xor, i can probably use it as a delay too
03:39 PM veverak: got rpi zero
03:39 PM veverak: let's play with it
03:39 PM veverak: but I also got raspberry pi 3 without working hdmi which I wanted to use
03:40 PM veverak: I will try another round of "config settings" tomorrow
03:40 PM veverak: maybe some reflow good work?
03:41 PM rue_shop1: a zero that doesn't work?
03:42 PM rue_shop1: do you know how to put togethor an image and stuff?
03:44 PM veverak: zero works
03:44 PM veverak: rpi got nonworking hdmi
03:44 PM veverak: I am pretty sure I spent 2 days at least trying configuration options and did not work
03:47 PM veverak: *rpi3
03:56 PM rue_bed: use the composite out?
03:57 PM rue_bed: so, a 74ls86, two gates as delays, 1 as xor, and one as a not
03:57 PM rue_bed: result, a dual-edge detectr
03:58 PM polprog: check boot.cfg or whatever it was called
03:58 PM polprog: maybe need to change hdmi_mode
03:58 PM polprog: if my memory serves me well
03:58 PM rue_bed: apparently composite is disabled by default
03:59 PM polprog: are you using NOOBS or something more bare metal?
04:15 PM veverak: rue_bed: have 5 inch touchscreen with HDMI input
04:15 PM veverak: polprog: raspbian, tried all the config changes that I found
04:15 PM veverak: will do that again tomorrow
04:16 PM polprog: i remember it was quite weird
04:16 PM polprog: good luck
04:18 PM veverak: I remember I tried a lot of variations to this
04:22 PM veverak: damn it
04:22 PM veverak: the rpi zero does not have full hdmi but this little weird thing
04:22 PM rue_bed: oh
04:23 PM rue_bed: does it break out on the pinheader?
04:23 PM veverak: wanted to try it on the zero
04:23 PM veverak: rue_bed: it has touchscreen part on the pinheader, but the video is over hdmi
11:56 PM rue_mohr: the original circuit used a bunch of nand gates and an or gate, then I realized that an xor could dispose of a few layers, then I realized that if the delayline inverted, I didn't need the output inversion