| ??? 09/09/05 08:49 Read: times |
#100848 - NPN? Responding to: ???'s previous message |
Lambros Sirivlis said:
If you want more current you have to use a NPN transistor That would be one way; but a PNP transistor would be better, given the 8051's open-drain ports - see: http://www.8052.com/forum/read.phtml?id=93726 and, of course, there are many other options with FETs, other ICs, etc, etc,... See: http://www.8052.com/forum/read.phtml?id=99947 Note that some 8051-drivates can sink quite high currents - even up to 20mA? But you must check this very carefully in the Datasheet - and there may also be limits for the total current on a single port and/or the total current for the whole device. Always Read the Datasheet! |
| 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 |