Review on ⏱️ XINGYHENG 5Pcs 12V NE555 Delay Timer Switch Module | Automotive Control System Timer Converter by Eric Jones

2 out of 5 units were DOA. One of them smoked. Bad chips 555. I was able to fix two since I have surface mount repair tools. Even if not everyone has access to it. The input will not be properly filtered if you use the same positive rail to power the common pin of the relay. Any inductive/electromagnetic noise will cause the 555 chip to fail or miss the delay altogether. To use it at all you need a separate power supply to trigger the relay and another to power your device through the relay. Not practical for all applications. I also made a mod on Kontakt 6 for three of them due to inoperability. Easy to fix, just poor quality control.