| ??? 02/04/05 09:29 Read: times |
#86522 - required AT89c2051 help on leds |
Hi,
I have created a small project for learning AtT9c2051.I have connected the 89c2051 to the serial port of the Pc.I have 8 Red leds connected on P1.0-P1.7 of 89c2051.Whwn i click a button on user interface each led lights up.But i noticed that when ANY 6 leds are lit up ,if i click to light up the remaining 2 leds the other leds turn off.I measured the voltage at the pins.The pins go to low state.What could be the problem |
| Topic | Author | Date |
| required AT89c2051 help on leds | 01/01/70 00:00 | |
| P1.0 and P1.1 input only | 01/01/70 00:00 | |
| Ignore earlier post | 01/01/70 00:00 | |
| trying to understand | 01/01/70 00:00 | |
| oh, by the way re posting code | 01/01/70 00:00 | |
| Check the datasheet | 01/01/70 00:00 | |
| to much | 01/01/70 00:00 | |
| Circuit Details of Led's | 01/01/70 00:00 | |
| to much for all | 01/01/70 00:00 | |
| 3rd way | 01/01/70 00:00 | |
Solution works | 01/01/70 00:00 | |
| ASCII schematic of Peter Herbst solution | 01/01/70 00:00 |