Hi guys
I'm building a UV box project with 4 7-segment displays as a readout (as it turns out, this is overkill, but oh well, it kinda looks funky ).
each 7-segment is controlled by a SIPO/SO IC, MC14094BCP. And they are controlled by a PICAXE microcontroller.
It has been working perfectly for the last couple of hours, but now 2 or 3 of the segments have started fading in and out randomly. It's not the whole thing, just individual segments. And it's independent of whether the display is changing/being updated.
I've spent hours checking the solder connections and checking continuity.. it all seems to be okay, and yet the flickering continues. I've tried putting capacitors of different values over the Vdd/Vss pins of the SIPO's, but no luck.
So my question is: in your experience what can cause such random things?
(I will upload a circuit diagram when I can, probably a few hours yet)
I'm building a UV box project with 4 7-segment displays as a readout (as it turns out, this is overkill, but oh well, it kinda looks funky ).
each 7-segment is controlled by a SIPO/SO IC, MC14094BCP. And they are controlled by a PICAXE microcontroller.
It has been working perfectly for the last couple of hours, but now 2 or 3 of the segments have started fading in and out randomly. It's not the whole thing, just individual segments. And it's independent of whether the display is changing/being updated.
I've spent hours checking the solder connections and checking continuity.. it all seems to be okay, and yet the flickering continues. I've tried putting capacitors of different values over the Vdd/Vss pins of the SIPO's, but no luck.
So my question is: in your experience what can cause such random things?
(I will upload a circuit diagram when I can, probably a few hours yet)
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