The base was cut from an old walnut log, which is why it has cracks.

The back with the cover removed, showing the control board annd the source (row) drivers. The sink (column) driver MOSFETS have little heatsinks.

This shows the strips cut from an unfilled memory board used to stiffen the thin wires of the display modules.

This is a movie of one cycle of the program. The rate is variable by the knob.