Twilight Zone RGB Clock Board A-16219 & A-16220

Williams Twilight Zone Clock Board

Plug and Play direct 1:1 replacement with all features from the original.

Replaces Williams A-16219 & A-16220

Over a year in the making, this Twilight Zone Clock board is unlike any other board on the market.

Features include:
- Upgraded switch triggering (read below)
- User controllable RGB lighting
- Isolated interactive LED lighting
- Upgraded solid multi stack board design
- High quality components
We only use genuine components from reputable companies,
(ST, Onsemi, Molex, Nichicon, TE Connectivity, Vishay, Yageo etc)
- 12 Months Local Warranty
- Designed & Assembled in Australia

One board to rule them all!

This is the first clock board with not only colour changing, remote controllable RGB LEDs, but also interactive GI white LEDs.
The colour changing RGB LEDs are powered off the 12V rail and stepped down via a TI TPS regulator. They are fully controllable using the included remote, which allows for single, solid colours, or fade/strobe effects.
The white LEDs are powered off the 6.3VAC GI line. They are regulated through a bridge rectifier, enabling the diodes to be powered via DC to prolong their life.

Why is this such a big deal?

The clock lamps in Twilight Zone are interactive GI lamps. At certain modes in the game, the GI will be triggered to start flashing. Having the white LEDs running off the GI line allows for these LEDs to have full interactive flashing within the game, isolated and independent of the state of the RGB LEDs. As the RGB LEDs don’t interact with the GI, an amazing light effect is seen between the flashing white LEDs and the RGB colour changing LEDs.

Why nearly all other aftermarket boards fail, or will eventually fail over time.

The original slotted opto part numbers were QVE11233.0086 (S-1865 and S-2187) (5490-12451-00 and 5490-13451-00). These were high gain phototransistors and were designed specifically for Williams by Fairchild Semiconductors (Onsemi). They are long obsolete, and the only replacements made by Vishay, do not meet the exact specs of the original.

In addition, the Optos on the clock board are driven out of spec, as their outputs are placed directly on the switch matrix. Whilst Vishay replacements may work at first, this disastrous recipe will eventually run the optos to the point of self-suicide. They will become flaky, triggering randomly and will need to be replaced.

In order to overcome this, we have redesigned this board using 339 comparators. This takes the triggering of the output of the opto off the matrix, and places it on the open collector of the 339, acting as a trigger in-between the opto and the matrix. In doing so, we can correctly use the Vishay opto within its design specification.

This upgrade is a major necessity, as running the optos within spec will allow them to last their full lifespan, keeping them from failing in a short time period. 

Game Compatibility:

Twilight Zone