Traffic Light Controller ARDUINO Based Sequencer AC Voltage Solid Sate Relay SSR (Unlimited Modes/Options Programmable) 100V-240VAC 50HZ-60HZ 3 Channel RED Green Yellow RYG Built-in Indicator LEDs: Amazon.com: Industrial & Scientific
Relay Sequencer
Electric Heat Sequencer Relay WR 24A34-2: Amazon.com: Tools & Home Improvement
Sequencer PCB for LNA, PA, RF-Relays, Transceiver – VHFDesign