S
Stephen Robinson
Guest
Hi Guys,
I am building a circuit that measures vacuum and displays it on a LED
bargraph and was wondering if anybody has any experience with the LM3914 led
driver IC, specifically, building displays with multiples of 10 led's.
I have the data sheet and have built a 30 led display in dot mode, but I may
need to go to either 40 or 50 led display to improve resolution but cannot
find any info on what is needed so it could be scaled correctly.
The data sheet has a lineararity circuit, which I thought would be
satisfactory for using as span adjustment, but in hind sight, am not so
sure. This is designed to be set and left. I want something that can be
adjusted as needed.
I hope I have given you enough info for you to help.
Stephen
I am building a circuit that measures vacuum and displays it on a LED
bargraph and was wondering if anybody has any experience with the LM3914 led
driver IC, specifically, building displays with multiples of 10 led's.
I have the data sheet and have built a 30 led display in dot mode, but I may
need to go to either 40 or 50 led display to improve resolution but cannot
find any info on what is needed so it could be scaled correctly.
The data sheet has a lineararity circuit, which I thought would be
satisfactory for using as span adjustment, but in hind sight, am not so
sure. This is designed to be set and left. I want something that can be
adjusted as needed.
I hope I have given you enough info for you to help.
Stephen