| ??? 05/30/07 12:36 Read: times |
#140054 - Something not right Responding to: ???'s previous message |
I can't see how the 89C51 port pin would have enough current to drive the ULN2003. I would normally use 74HC04 inverters in this instance. Do you have a program in your 89c51 to drive the stepper motor? The measurement of 5V might be due to the frequency of the program. |
| Topic | Author | Date |
| stepper motor voltages | 01/01/70 00:00 | |
| any schematics? | 01/01/70 00:00 | |
| Something not right | 01/01/70 00:00 | |
| Consult the stepping motor datasheet | 01/01/70 00:00 | |
| not really | 01/01/70 00:00 | |
| experience ... | 01/01/70 00:00 | |
| Discontinued? | 01/01/70 00:00 | |
I do not recall which manufacturer | 01/01/70 00:00 | |
| What is type of your motor? | 01/01/70 00:00 | |
| pay attention to the specifications | 01/01/70 00:00 | |
| Alternatives | 01/01/70 00:00 | |
| There are more general places to look | 01/01/70 00:00 | |
| Everything in one IC | 01/01/70 00:00 |