Project Board 20x2

M

marks

Senior Member
time I made myself a project board for the 20x2
thought I now knew a little bit to adventure dangerously!

included on the board is a ds3231 rtc it really does keep better time than a ds1307
runs hi2c at 400khz and a super cap to backit up.
gone a bit overboard with the supply and coupling caps but wanted it to be realiable.
(really so i can just focus on the code errors lol.)
and some darlington drivers so i can drive some bigger displays.

Ive rewritten some code to drive 6 segments ( 4 one inch and 2 half inch)santa was a scruge
at 16mhz so i could test it let it run a couple of days error free so far so i'll post it.
Still going to add to the board some extra pinouts for expansion serial lcd and temp sensors etc...
will be using the b port.as the c port on c.0 version does some funny things to the b port.
I really need to buy a new 20x2 hmm maybe 28x2!!
 

Attachments

M

marks

Senior Member
test prog a clock using 6 segments the two smaller 1's displaying seconds.
date and time can be programmed with pushbutton.
displays time , date and temp
two supplys are needed 5v for the picaxe and 8v to drive the displays.
inrush can be high on those supercaps plus 200ma but quickly settles toabout 30ma
and reducing until fully charged.
 

Attachments

Last edited:
W

westaust55

Moderator
The solution to limitations such as 2 attachments per post is to create a “collage” with two or more photos/diagrams in the one jpg or pdf file.
 
You must log in or register to reply here.
Top