| ??? 10/08/06 10:32 Read: times |
#126005 - Some suggestions Responding to: ???'s previous message |
7805 regs are not really good for automotive applications. I would uggest you visit national semiconductor and look for something more suitable. Nevertheless, I would suggest a 1N4004 diode in series with the input voltage and a 470uF electrolytic capacitor on the regulator side of this diode. Reason is that charging circuit on your motorbike may do weird things and you may not be getting the nice pure DC you expect. The 1n4004 diode decouples this and you rely on the electrolytic to smooth things out. Depending on the charging system, I sometimes use a 10ohm resistor in series and a 24V zener diode to clip any regulator induced spikes. The 10Ohm resistor will need to be 1W or greater depending on how much current your alarm pulls. As for disabling the ignition, can you not switch the DC to the CDI unit or for a total loss system, switch the alternator winding or pickup signal? |
| Topic | Author | Date |
| How to remove noise from motorbike ignition ? | 01/01/70 00:00 | |
| How do you know it's an EMC problem? | 01/01/70 00:00 | |
| if it is EMI, then here are 2 problems | 01/01/70 00:00 | |
| Steel Box | 01/01/70 00:00 | |
| Thanks for your sugestion | 01/01/70 00:00 | |
| Some more details needed | 01/01/70 00:00 | |
| Its pretty standard | 01/01/70 00:00 | |
| m or u | 01/01/70 00:00 | |
Some suggestions | 01/01/70 00:00 |