| ??? 10/03/05 12:17 Read: times |
#101844 - I guess you are referring to the hex Responding to: ???'s previous message |
I always used a schmitt trigger IC and connected it to the port. I don't remember what the number was, but I thought there used to be a 74000 series IC which had 8 inputs and 8 outputs with a straight-thru configuration which could source up to 20ma per trigger.. Does anyone know the name or number of this chip?
I guess you are referring to the hex schmitt trigger 74xx14, usually these days that will be 74H14. Erik |
| 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 |