Search found 197 matches

by ijabbott
Sat Apr 10, 2021 2:26 pm
Forum: DM42
Topic: LOG bases
Replies: 17
Views: 696

Re: LOG bases

(Nitpicky remark: LG is identical to LOG10 like LN being identical to LOGe and LB to LOG2. Never let any mathematician catch you with a naked LOG in your text!) I think pure mathematicians tend to assume \(\log\) means \(\log_e\) because they don't have a lot of use for \(\log_{10}\). Yes. In fact,...
by ijabbott
Fri Apr 09, 2021 8:44 pm
Forum: Developer Forum
Topic: WP34S for the DM42
Replies: 50
Views: 2029

Re: WP34S for the DM42

Feel free to ignore this suggestion, but would it be possible to combine the three display options into a single executable? I'm not sure of all the implications of that, but I guess it would need a configuration menu somewhere, and some hard-coded constants changed into variables.
by ijabbott
Tue Mar 23, 2021 10:12 pm
Forum: DM42
Topic: LOG bases
Replies: 17
Views: 696

Re: LOG bases

Walter wrote:
Sat Mar 20, 2021 11:13 am
(Nitpicky remark: LG is identical to LOG10 like LN being identical to LOGe and LB to LOG2. Never let any mathematician catch you with a naked LOG in your text!)
I think pure mathematicians tend to assume \(\log\) means \(\log_e\) because they don't have a lot of use for \(\log_{10}\).
by ijabbott
Tue Mar 23, 2021 10:05 pm
Forum: Developer Forum
Topic: WP34S for the DM42
Replies: 50
Views: 2029

Re: WP34S for the DM42

I am having a spot of bother getting the program to run on my DM42, so just to confirm that these steps should work: 1) Git cloned the project. 2) Activated USB disk mode on the DM42. 3) Copied the build/wp34s.pgm file to the root dir of the USB disk. 4) Copied the help/wp34s_help.html file to the ...
by ijabbott
Tue Mar 23, 2021 9:40 pm
Forum: Usage tips, tricks and problem reports
Topic: third root of -8...
Replies: 25
Views: 1534

Re: third root of -8...

This "unary minus," having higher precedence than subtraction, is something I seem to have found in every parser textbook I've ever looked at, but I can't figure out where it comes from. It doesn't seem to have originated from mathematics, or at least, all the math textbooks I have ever s...
by ijabbott
Thu Feb 25, 2021 1:15 am
Forum: OFFIMG library
Topic: Add your own caption
Replies: 0
Views: 207

Add your own caption

cthulhu-sign.bmp
cthulhu-sign.bmp (12.25 KiB) Viewed 207 times
by ijabbott
Fri Oct 30, 2020 8:21 pm
Forum: Discuss!
Topic: WP34S overlay and cable
Replies: 16
Views: 1938

Re: WP34S overlay and cable

gerryk wrote:
Mon Oct 26, 2020 7:47 pm
You don't need a special cable to flash. You can make an adapter from a piece of 2.54mm header and a couple of resistors. This will allow you to use a standard USB to serial adapter to flash.
The pads are on a 2mm pitch, so standard 2.54mm (0.1") header won't fit.
by ijabbott
Tue Oct 20, 2020 9:21 pm
Forum: Usage tips, tricks and problem reports
Topic: Can't get USB to work correctly
Replies: 6
Views: 768

Re: Can't get USB to work correctly

Some Micro-B cables seem to have longer plugs, i.e. they stick out from the plastic moulding more. Use those.
by ijabbott
Wed Oct 07, 2020 8:35 pm
Forum: Usage tips, tricks and problem reports
Topic: Contrast of screen
Replies: 4
Views: 821

Re: Contrast of screen

Not sure what a contrast adjustment would achieve on the DM42, since the 'on' pixels are already pretty black and the 'off' pixels are transparent. It looks great in decent lighting conditions.
by ijabbott
Sat Oct 03, 2020 9:11 pm
Forum: DM42
Topic: DM42 with homemade printer
Replies: 46
Views: 4917

Re: DM42 with homemade printer

I had some time today to write some more code. I now have the code running on a single Arduino Uno and it uses the correct font! That is, as far as I could decipher from a printout. There might be some pixels wrong here and there on some of the characters. So I have a request, can anyone who has a ...