| ??? 09/03/09 09:40 Read: times |
#168720 - PIR is inverted using a BC547 Responding to: ???'s previous message |
Hi Kalpak,
PIR is inverted using a BC547 (the generic use of transistor as inverter) . This is done because PIR module gives active high, and for waking MCU I needed active low. regards, Anurag |
| Topic | Author | Date |
| Is pull-up needed for INT0 / INT1 | 01/01/70 00:00 | |
| Is the PIR output open collector? | 01/01/70 00:00 | |
| PIR is inverted using a BC547 | 01/01/70 00:00 | |
| Use a base-emitter resistor | 01/01/70 00:00 | |
| /INT0 : write 1 to config as i/p pin ? | 01/01/70 00:00 | |
| Of course you should be an input | 01/01/70 00:00 | |
Don't think that way! | 01/01/70 00:00 |