In SX Microcontrollers, SX/B Compiler and SX-Key Tool, william wrote:

I recently noticed that the SX running at either 4Mhz or 50Mhz is affected by nearby sparks.
When this happens, the SX hangs or jumps to a random part of the program.

This spark can be from a simple switching on or off of a nearby electrical appliance.
At first I thought that the spark was transmitted through the same mains 240V supply through the adapter into the SX,
then yesterday I did another test with the SX board running from a 12V battery.

I found that the SX is still afffected by the nearby sparks even when it is battery powered !

Has anybody had the same problem?
Any filtering or shielding suggestions?

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