| ??? 07/05/06 12:03 Read: times |
#119653 - the 'perfect' solution Responding to: ???'s previous message |
is to use a 'real' LED chip such as the SITI ST221a http://www.siti.com.tw/product/s...T2221A.pdf or the Allegro A6278 or A6279 http://www.allegromicro.com/sf/6278/ . These chips have constant current drive for each and every LED. These are examples, other similar chips exist, e.g. Rohm.
Erik |
| Topic | Author | Date |
| Dot Matrix & 7Segment at same time??? | 01/01/70 00:00 | |
| Pardon? | 01/01/70 00:00 | |
| No clairvoyant here ! | 01/01/70 00:00 | |
| Clarification... | 01/01/70 00:00 | |
| At the same time! | 01/01/70 00:00 | |
| dot matrix in a timer | 01/01/70 00:00 | |
| it's clear enough, thanx... | 01/01/70 00:00 | |
| I add a resistor. | 01/01/70 00:00 | |
the 'perfect' solution | 01/01/70 00:00 |