Pages: [1]   Go Down
Author Topic: 7 Segment display - help.  (Read 624 times)
0 Members and 1 Guest are viewing this topic.
Oz
Offline Offline
God Member
*****
Karma: 3
Posts: 659
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Folks, my old books are no longer valid.

They have chips in them which aren't available and there are new chips which aren't listed.

I want a BCD - 7 segment display driver.

I am going for a 4056.

I hope that drives "common cathode" displays.

Of course the next problem is (though I think I have nutted it out) the 7 segment display I have.

It has 4013 stamped on the side of it.  It has 10 pins.  Counting them the way you do an IC, I have determined:
1 - cathode.
2 -> 5, 8 -> 10 are the display and 7 is the RIGHT decimal point.

Pin 6 doesn't seem to be used though there is a LEFT decimal point.

I guess if running on 12v I will need 150 ohm resistors between the 4056 and the display?

Logged

Offline Offline
Edison Member
*
Karma: 57
Posts: 2194
Now, More Than Ever
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I am going for a 4056.
I hope that drives "common cathode" displays.

There's no hoping in electronics.

A 4511 will do for common-cathodes.
http://www.doctronics.co.uk/4511.htm
Logged

"Hello, I must be going..."
"You gotta fight -- for your right -- to party!"
Don't react - Read.
"Who is like unto the beast? who is able to make war with him?"

0
Offline Offline
Shannon Member
****
Karma: 162
Posts: 10520
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

4056 - I think that chip is specially for LCDs rather than LEDs - you need a higher current output for LEDs, the 4511 is one I used in a previous universe(!) for common-cathode displays.  Latches and does bcd -> 7seg
Logged

[ I won't respond to messages, use the forum please ]

Oz
Offline Offline
God Member
*****
Karma: 3
Posts: 659
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Yeah, sorry as I think I said, my "data books" are from the 80's.

Shall have to look around a bit more.


So I shall be using a 4511.

« Last Edit: October 20, 2012, 06:13:58 pm by lost_and_confused » Logged

0
Offline Offline
Shannon Member
****
Karma: 162
Posts: 10520
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

The "4013" marking might be related to a Fairchild FLB4013X1 - 2" by 1.2" large 7-seg display with 4 digits?  The best my web search found.
Logged

[ I won't respond to messages, use the forum please ]

Pages: [1]   Go Up
Jump to: