In all, there are some seven modules to build for the Electronic Scoreboard – two for the control console and five for the main display unit. We’ll start with the assembly of the control console modules.

This view shows the completed switch board that's used in the control console. Follow this to install the correct keytop colour in each location.

As shown in the photos, the Scoreboard’s control console is built into a compact sloping-front ABS plastic case. This case measures 189 x 134 x 32/55mm and is listed in the Jaycar catalog as HB-6094.

Inside the case, most of the circuit components are mounted on a PC board measuring 178 x 111mm and coded BSBKYBD1. This fits snugly into the lower half of the case. The only remaining components are the keyswitches and the two indicator LEDs, which mount on a second smaller PC board measuring 163 x 100mm and coded BSBKYBD2. This switch board fits inside the top of the case, behind the front panel, and the two boards are connected together via a short length of 16-way ribbon cable fitted with IDC connectors.