At 10:02 PM 9/4/97 -0700, you wrote:
>How about a crowbar circuit like this added to the reg circuit. You can
>adjust the amount of current limit with VR1. The scr will force the fuse
>to blow if it goes
>beyond the set limit.
There's little reason to check for overvoltage, the deflection board will
run just fine on the full unregulated voltage.
If both sides were to fail into a full voltage mode, the HV regulator could
have a hard time with it, but this is pretty unlikely.
Most overvoltage protection was done on the old 5v zillion amp regulators
where an overvoltage condition could take out thousands of dollars of
computer boards.
The circuit looks decent enough (well you are running the LM317 at 1.2volts
-- but we know what you meant!)
-Zonn
Received on Fri Sep 5 15:23:13 1997
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