| ??? 07/01/07 13:49 Read: times |
#141390 - Previously discussed Responding to: ???'s previous message |
Your circuit requires the 8051 to source current to the transistor:
Standard 8051 ports are effectively Open-Drain - they are not good to source current! See previous discussion here: See: http://www.8052.com/forum/read.phtml?id=120512 |
| Topic | Author | Date |
| driving relay | 01/01/70 00:00 | |
| Base resistor | 01/01/70 00:00 | |
| Previously discussed | 01/01/70 00:00 | |
| Status LED | 01/01/70 00:00 | |
| What gets hot? | 01/01/70 00:00 | |
| relay specifications? | 01/01/70 00:00 | |
| mc gets hot | 01/01/70 00:00 | |
| What ? | 01/01/70 00:00 | |
| Reading time! | 01/01/70 00:00 | |
Still no relay spec's | 01/01/70 00:00 |