| ??? 07/14/04 13:54 Read: times |
#74225 - RE: Opto-isolators on external interrupt Responding to: ???'s previous message |
James Krushlucki wrote:
------------------------------- Hmmm.. .8 volts from the pickup, I could probably use a small signal diode and current limiting resistor in series with the pickups and INT0 and INT1 and do away with the optocouplers on the input end of the MCU.
Make Sense? Nope. Dumb idea ;-) 0.8 volts less a diode drop less is 4/5 or 5/8 of %^&^*-all. Not enough to trigger the processor. As Kai comments we don't have enough info, but either a.) Your hall sensor doesn't give enough o/p and you need amplifiers. b.) Your inductive pickup doesn't give enough o/p at low revs and you are still screwed, and need amplifiers. Steve |
| Topic | Author | Date |
| Opto-isolators on external interrupts | 01/01/70 00:00 | |
| RE: Opto-isolators on external interrupt | 01/01/70 00:00 | |
| RE: Opto-isolators on external interrupt | 01/01/70 00:00 | |
| RE: Opto-isolators on external interrupt | 01/01/70 00:00 | |
| RE: Opto-isolators on external interrupt | 01/01/70 00:00 | |
| RE: Opto-isolators on external interrupts | 01/01/70 00:00 | |
| RE: Opto-isolators on external interrupt | 01/01/70 00:00 | |
| RE: Opto-isolators on external interrupts | 01/01/70 00:00 | |
| RE: Opto-isolators on external interrupts | 01/01/70 00:00 | |
| RE: Opto-isolators on external interrupts | 01/01/70 00:00 | |
| RE: Opto-isolators on external interrupt | 01/01/70 00:00 | |
| RE: Opto-isolators on external interrupt | 01/01/70 00:00 | |
| We have too little information!! | 01/01/70 00:00 | |
RE: Opto-isolators on external interrupt | 01/01/70 00:00 | |
| RE: Opto-isolators on external interrupts | 01/01/70 00:00 | |
| RE: Opto-isolators on external interrupts | 01/01/70 00:00 |