If you have multiple aspect signals (3 and 4) the yellows are also incorporated into this sequence. These signals are easy to set up and only require a single wire to link them all together to the sequence.
Train-Tech SS1 Sensor Signal - 2 Aspect Home OO Gauge
Train-Tech SS1 OO Gauge Sensor Signal 2 Aspect Home
Train Tech SS1 OO Gauge 2 Aspect Home Colour Light Signal
Train‑Tech SS1 Automatic 2‑Aspect Signal – OO Gauge – DC/DCC – New
Train Tech SS9T Sensor Signal (Theatre Indicator) Multi 3 Aspect
Train Tech SS10T Sensor Signal (Theatre Indicator) Multi 4 Aspect
