I created a 555 Adjustable Delay On Off Timer Circuit. This timer circuit is useful when you need to power On/Off any AC Appliances after a pre-defined duration. For example, you can use this circuit to automatically turn off a mobile charger after a certain period of time to avoid over charging, or you can turn on/off a light bulb after a certain period.
The time delay of this circuit can be adjusted by using various combinations of resistors and capacitors.
Here are the video and blog post links:
Video: https://www.youtube.com/watch?v=AB8XjBGvlPY
Blog: https://diy-projects4u.blogspot.com/2023/11/555-Adjustable-Delay-Timer.html
I guess everything old becomes new again. I built one of my first DIY projects with a 555 back in the early '80s, a variable windshield wiper delay for my car. Back then you only got that feature on really expensive cars so it was way cool to have it in a '74 Volvo wagon.