| ??? 06/06/09 11:43 Read: times |
#165898 - Also known as MUM syndrome Responding to: ???'s previous message |
Raghunathan said:
Yes low voltage components need all the protection from the "dirty" noise glitches from highvoltage compoenets like motors, solenoids etc.
Right now I have eliminated the problem almost to a non-existent level : There was a thermostat that was switching on the cooler motor relay and that relay had no free wheel diode earlier. Now it has. Introduced a three phase snubber network acroiss the motor terminals. With the above remedies, the MCU does not get reset as earlier but only very, very occassionaly. And I also know one thing for sure : Right now I have completed 300,000 cycles and the client is visiting me on Wednesday, when I will complete 1 million cycles. And the MCU sure WILL reset in front of him !! Raghu That is why test frequently in the presence of your boss/ client. More important than environmental and regulatory tests. :-) Also known as MUM (member of upper management) syndrome. I think you are tackling the problem in the wrong place. The problem seems to be with the MCU power supply section or PCB layout. Whereas you are hunting down the sources, which will change as new equipment gets added in the factory. |
| Topic | Author | Date |
| Frequent resets - how bad ?? | 01/01/70 00:00 | |
| Welcome to the club! | 01/01/70 00:00 | |
| and... | 01/01/70 00:00 | |
| maybe | 01/01/70 00:00 | |
| I would think | 01/01/70 00:00 | |
| situation under control | 01/01/70 00:00 | |
| Also known as MUM syndrome | 01/01/70 00:00 | |
| me too | 01/01/70 00:00 | |
Crystal Resonator or Clock? | 01/01/70 00:00 |