| ??? 09/27/10 13:31 Read: times |
#178749 - almost true Responding to: ???'s previous message |
but since the FET is supposed to be Voltage dependant and not Current dependant
at turn on a FET is 'current dependent' FETs have an enomous gate capcitance and it takes current to overcome that. Try a pullup resistor on the port pin and no - or a very small - series resistor to the gate. The fact that one derivative works and another not seems to indicate that this may be the problem. The pullup of p1-p3 pins vary greatly from derivative to derivative. Erik |
| Topic | Author | Date |
| 89S52 and BS170? | 01/01/70 00:00 | |
| As written.... | 01/01/70 00:00 | |
| Exactly! | 01/01/70 00:00 | |
| almost true | 01/01/70 00:00 | |
| Series resistor to the gate | 01/01/70 00:00 | |
| Most 8051's | 01/01/70 00:00 | |
| Re: Most 8051's | 01/01/70 00:00 | |
| Several reasons... | 01/01/70 00:00 | |
| pop explained in earlier posts | 01/01/70 00:00 | |
| RE: pop explained in earlier posts | 01/01/70 00:00 | |
| RE: Several Reasons | 01/01/70 00:00 | |
| Update: May be ESD after all | 01/01/70 00:00 | |
| There is a trick... | 01/01/70 00:00 | |
RE: There is a trick... | 01/01/70 00:00 |