| ??? 02/02/05 10:14 Read: times |
#86361 - 5V regulator Responding to: ???'s previous message |
Sun Din said:
I then used a scope to measure the potential at the Vcc pin of the uC and the output pin of my 5V voltage regulator.
I found that when the first pnumatic piston is energised (after all of them had been de-energized) a 14 to 16 V peak-to-peak spike appeared on the pins, even though the 5V regulator was present. Is the spike also present on the input to the regulator? Can you post your regulator circuit? Are you sure it's a spike on the supply, rather than a dip in the Ground reference? The same did NOT appear on the PIC board! Again, was the spike also present on the input to this board? Can you post the regulator circuit used on this board? Of course, it may be nothing to do with the regulator - the spike may be entering by another route. Again, you need to try using a completely separate power supply (isolated from all your solenoids, etc) to check this. |
