| ??? 04/28/06 07:53 Read: times |
#115154 - Specifically not ULN2002 Responding to: ???'s previous message |
ULN2002 has a zener in series at the input for higher input voltages. So at 5V input, it will function marginally or not all. The correct chip is ULN2003 or ULN2803. |
| Topic | Author | Date |
| Trying to drive 12v relay using tr557 | 01/01/70 00:00 | |
| Search! | 01/01/70 00:00 | |
| !Search | 01/01/70 00:00 | |
| Use Darlington pair | 01/01/70 00:00 | |
| Specifically not ULN2002 | 01/01/70 00:00 | |
| What is tr557? | 01/01/70 00:00 | |
| Deja vu | 01/01/70 00:00 | |
| Do not connect PNP with 12V to port pin | 01/01/70 00:00 | |
| 12V relay with BC547 drive Thanks to all | 01/01/70 00:00 | |
Mr. Karas's Relay Drive Circuit | 01/01/70 00:00 |