Review on ⏱️ XINGYHENG 5Pcs 12V NE555 Delay Timer Switch Module | Automotive Control System Timer Converter by Justin Goff
Switches only once. Maintains a persistent state after a delay.
I assumed the 555 would provide a variable duty cycle pulse to toggle the NC and NO contacts back and forth at a rate determined by RC TC. What it actually does is an initial on-delay where the relay is not energized, and once the relay is energized (output 555) it remains energized. Power must be removed to reset the relay to the de-energized state.
- Rugged design
- Ugly packaging
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