| ??? 11/30/08 14:31 Read: times |
#160433 - about the port1 in 89c52 |
hai,
im using 89c52 for my project, i want to connect the relay to the port1.0 pin. so i gave P1^0 to resistor value of 1K and to BC547. when i give pulse1 to the pin i get 0.69V instead of 5V. i used pullups then it worked. but i studied intthe datasheet that port1 need not any pullups. pls help in this topic. thank u. |
| Topic | Author | Date |
| about the port1 in 89c52 | 01/01/70 00:00 | |
| Souce current | 01/01/70 00:00 | |
0.69V... | 01/01/70 00:00 |