| ??? 09/09/05 07:31 Read: times Msg Score: -1 -1 Didn't Search First |
#100840 - 8051 port problem |
Hi all,
I am a new user to 8051. I tried to write a program that would flash LED connected tp 8051 Ports. the program works fine with the keil simulator. when i tried to see the output in the hardware (MCBx51 board) by connecting a LED (red) to the corresponding port the light is glowing very dim.Even if i set the port value to "zero" the LED is glowing. I used a pull up resistor (220 ohm and 330 ohm) and it didnt work. do i need to conncet anyother ic to the port to make the LED to glow for port value=1 and off for port value=0 ? needing ur ideas and helps t.s |
| Topic | Author | Date |
| 8051 port problem | 01/01/70 00:00 | |
| Which port? | 01/01/70 00:00 | |
| Port current | 01/01/70 00:00 | |
| 8051 port problem | 01/01/70 00:00 | |
| Just look at this: | 01/01/70 00:00 | |
| NPN? | 01/01/70 00:00 | |
| schmitt trigger | 01/01/70 00:00 | |
I guess you are referring to the hex | 01/01/70 00:00 | |
| Have you tried BLINK? | 01/01/70 00:00 | |
| checked the MCBx51 board | 01/01/70 00:00 | |
| Connect as shown | 01/01/70 00:00 | |
| Led problem | 01/01/70 00:00 |