The voltage output was a bit too low. The panel expects over 250V at 800 Hz to drive to full brightness, but I was about 20% low even with the dimmer potentiometer completely out of the circuit. I tried increasing the +14V supply a bit, which gave me a very small but real increase in output voltage. When I varied the +24V supply, however, it seemed to make very little difference. I will look further into this.
CHECKING OTHER SEGMENTS
I tried connecting the power to a number of the other segments on the panel, such as the signs for R1 and R3, some segments on digits in VERB and R2, with every segment I checked lighting just fine. My problems appear to be solely with the COMP ACTY feature, which only illuminated a small dot inside the COMP ACTY rectangle.
I was able to get the static elements to light up after I tweaked the voltage from the supply up a bit. Very pleased. Even if the computer activity segment is damaged somehow, I seem to have a decent display in all other particulars.
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| Static features lighting up! |
NEXT STEPS
I expect to wire up all seven segments of a digit and the two portions of a sign, hooking them to the relay module which in turn will be powered by the power supply module. I anticipate driving this an Arduino based setup allowing me to cycle through digits and the sign values. This will take a few days to wire up.
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