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What Is a Latching Relay? - Types of Relays
Latching Relay to Flip Flop
Relay-Based ON/OFF Flip-Flop Remembers State During Power Failure | Electronic Design
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10pcs 5V 6V 9V 12V 24V Flip Flop Latch Relay Module Bistable Self locking Switch Board for Arduino UNO pump door lock dc motor|Relays| - AliExpress
Building circuit for n-relays using flip flops, is this the best solution? - Electrical Engineering Stack Exchange
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Latching Relay to Flip Flop
5V 4 channels Flip-Flop Latch Relay Module Bistable Self-locking Switch Low pulse trigger Board for Arduino Smart home LED Motor [IO25C04] - USD $6.99 : canton-electronics.com