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 see that some 50 years later 555’s are still ticking along. I used a couple of them to flash the leds on a foam snowman I made for a Christmas display on the ship I was stationed on. The chips made it easier than building TTL timer circuits by hand.
555 are pretty old school we were doing this sort of thing in the 80’s.
Considering the cost of a esp32 that can do this and much much more for as many devices you can have near it not really seeing the value here before learning 80’s EE.
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.