| ??? 07/15/07 17:44 Read: times |
#141908 - a relay driver |
i use bipolar pnp transistors for driveing a relay . as a common emitor.
but i have one proplen . when 8052 starts, all ports set whit high level voltage and relays actives befor any commands. i want a better way for driving a relay . and i want to make this relay Active Low . i use 12v dc relay |
| Topic | Author | Date |
| a relay driver | 01/01/70 00:00 | |
| try this | 01/01/70 00:00 | |
| if it otherwise works, just insert an inverter | 01/01/70 00:00 | |
Use PNP and "0" logic | 01/01/70 00:00 |