5 Pack NE555 12V DC Adjustable 0-10 Second Timer Delay Relay Switch Module Shield for Arduino Raspberry Pi

The 5 Pack NE555 12V DC Adjustable Timer Delay Relay Switch Module Shield for Arduino and Raspberry Pi has received mixed feedback from users, resulting in a divided customer experience. On one hand, some users found the modules to be functional and useful for their specific applications, such as managing power for Halloween animatronics or creating recurring event timer circuits. These customers praised the good bulk pricing and quality of material used across the modules. They reported satisfactory performance in their projects, indicating that the modules served their intended purpose effectively and without issues. Conversely, a significant number of users reported serious defects in the timer functionality. One review particularly highlighted that three out of five modules were previously opened and resealed, raising concerns about quality control and reliability. Users experienced immediate energization of relays upon power application, with no adjustable delay action, suggesting a failure in the timing circuit. This group expressed frustration over the apparent defects, asserting that the modules may have been poorly built or refurbished returns. They strongly advised against purchasing these units, emphasizing the potential hassle and cost of returns that outweighed the initial savings. In summary, while some customers found value in the NE555 timer relay modules for various experimental uses, the overall reception was tarnished by reports of defects, repackaging issues, and quality concerns. It appears that potential buyers should proceed with caution, weighing the positive uses against the risk of receiving malfunctioning units. **