wedowelaugh
- Mar 18, 2013
- 2
- Joined
- Mar 18, 2013
- Messages
- 2
K..So we're trying to build this digital clock for our digital project.
And as I've seen in many schematics, certain values of resistances have been added between the outputs of the CD4511 decoder (BCD to 7 segment display decoder) and the inputs of the led 7 segment display.
These resistance values were different for the different levels of seconds, minutes and hours part of the clock.
Does anyone here know how to calculate the resistance values from CD4511 to 7 segment display?
The schematic of a clock is as shown here -
https://docs.google.com/file/d/0B-k...TE5LWFiNmQtOWM5MjcyYjFlY2Ji/edit?pli=1&hl=en#
We'd like to add milliseconds display to this for which we don't know know how to calculate resistance to the 7 seg display.
Your help is highly appreciated.
And as I've seen in many schematics, certain values of resistances have been added between the outputs of the CD4511 decoder (BCD to 7 segment display decoder) and the inputs of the led 7 segment display.
These resistance values were different for the different levels of seconds, minutes and hours part of the clock.
Does anyone here know how to calculate the resistance values from CD4511 to 7 segment display?
The schematic of a clock is as shown here -
https://docs.google.com/file/d/0B-k...TE5LWFiNmQtOWM5MjcyYjFlY2Ji/edit?pli=1&hl=en#
We'd like to add milliseconds display to this for which we don't know know how to calculate resistance to the 7 seg display.
Your help is highly appreciated.