| ??? 04/13/05 06:53 Read: times |
#91492 - Drivers Responding to: ???'s previous message |
For my last multiplexed led display that used larger digits, I used ULN2003 for the cathode drive and UDN2981As for the anode drive. You will need resistors to limit the current on the anodes (if displays are common cathode). Rather than use 74hc373's I used 74HC595's which are a serial shift register - uses only three port pins - clock,data and load.
With the UDN2981A you can choose to use 5V or a higher voltage to drive the leds - the chips do the level translation for you. |
| Topic | Author | Date |
| Seven Segment Displays Driven By 8051 | 01/01/70 00:00 | |
| Maxim part | 01/01/70 00:00 | |
| Integrated MUX drivers are 5V only | 01/01/70 00:00 | |
| Confused | 01/01/70 00:00 | |
| Multiplexing 7-segment LED displays | 01/01/70 00:00 | |
| rate of multiplex | 01/01/70 00:00 | |
| Yes, of course, | 01/01/70 00:00 | |
| Further Clarification of My Project | 01/01/70 00:00 | |
| nobody can answer that | 01/01/70 00:00 | |
| No 373s! | 01/01/70 00:00 | |
| Ohhh! Pretty NM | 01/01/70 00:00 | |
| OK | 01/01/70 00:00 | |
| MAX7219 | 01/01/70 00:00 | |
| Like this | 01/01/70 00:00 | |
| current? | 01/01/70 00:00 | |
| LSD23255-10 Display Specs | 01/01/70 00:00 | |
| data sheet? | 01/01/70 00:00 | |
| GOOGLE!!! | 01/01/70 00:00 | |
| Multiplexing | 01/01/70 00:00 | |
| Drivers | 01/01/70 00:00 | |
| 74hc595 alt. | 01/01/70 00:00 | |
| TPIC6C595 by TI? | 01/01/70 00:00 | |
Thanks. | 01/01/70 00:00 |