#robotics Logs

Sep 28 2019

12:01 AM rue_mohr: ok
12:06 AM rue_mohr: two goals
12:06 AM rue_mohr: test one of these ferrite cores
12:06 AM rue_mohr: and hook up a serial lcd to a tiny13
12:57 AM rue_mohr: centre at 2.3V
11:08 AM rue_bed: I think I know why biasing them at 2.8 didn't work
11:08 AM rue_bed: darn my grainy photographic memory
11:12 AM polprog: i found my serial VFD
11:12 AM rue_bed: cool!
11:12 AM polprog: nice thing. 3 pins, 5V, Rx and GND and you have a working serial display
11:12 AM rue_bed: I think I know where mine went
11:12 AM polprog: got a 2-line unit as well, but thats paralell
11:12 AM rue_bed: ah, I think mine is synchrnous
11:12 AM polprog: i could try and make a glue logic driver for it
11:13 AM rue_bed: might be that i2c chip
11:13 AM polprog: like, totally CPU-less design
11:13 AM rue_bed: I'v done a '595 before
11:13 AM polprog: that would display eprom contents
11:13 AM rue_bed: hah!
11:13 AM rue_bed: do-able
11:14 AM polprog: was organizing the workbench today, all displays went into a bubblewrap filled box
11:14 AM polprog: de-messing as we say
01:01 PM veverak: shall I write rolling id type or not?
01:01 PM veverak: takes any uintX_t
01:01 PM veverak: for uint8_t, this holds: 0 < 1 ... 245 < 255 < 0 < 1 ....
01:02 PM veverak: got neat idea, divide the possible values in 4 sectors
01:03 PM veverak: 0-63, 64-127, 128-193, 194 - 255
01:03 PM veverak: which makes A,B,C,D sectors
01:03 PM veverak: for any numbers in those sectors, this holds: A < B, B < C, C < D, D < A
01:03 PM veverak: which is quite easy to check, just look at first two bits
02:06 PM logb0t_ is now known as logb0t
06:47 PM logb0t_ is now known as logb0t
06:56 PM Tom_itx is now known as Tom_L
07:05 PM Tom_itx is now known as Tom_L