The LCD hygrometer from May was useless because it was too small & it was unexpectedly being used a lot more than expected.  The humidity was expected to be very constant near 25%.  In reality, it varied from 20 - 55% by the hour.  The decision was made to make another large LED panel.  At least it showed 2 small LCD panels could be stacked to make a less small numeric display.

For this panel, the exact foam strips to be used were colored in different colors.  Colors changed as various 25 year old highlighters died.  Does generation Z even use highlighters?

Lion tip: swing the monitor out of the way to free up more room.

Vertical strips were cut 1st with scissors & hot glued with glue applied to the paper side 1st.  Then horizontal bits were cut exactly to the right size & glued in.  Being an ancient posterboard, it was warped into a picture tube.

Being a used PIC18LF458 from 15 years ago, the bug in this one was the MCLR pin requiring a switch to program it, otherwise it would show read failures.  There is a spot for adding an XBee for transmitting humidity readings to a humidifier.  That meant the PIC ran on 3.3V.  The clock was a recycled 4.1943 Mhz crystal.

The next task is waiting for the slow boat from China to bring LEDs.