How to Make an AC Softstarter

In this project I will show you why my new autotransformer keeps tripping my circuit breaker and how I built an AC softstarter in order to "softly" start the transformer so that it does not trip my circuit breaker. Along the way we will find out how exactly this problem gets created and how you can fix it easily. BTW, such softstarters are also useful for motors ;-) Let's get started!

Make sure to watch the video since it will give you pretty much all required information to build an AC softstarter. During the next steps though I will present you some additional information.

Here you can find a parts list with example seller (affiliate links):

1x Arduino Nano: https://s.click.aliexpress.com/e/_dULoNXh

1x Push Button: https://s.click.aliexpress.com/e/_Aeay0k

1x Red & Green 5mm LED: https://s.click.aliexpress.com/e/_dV63r7D

Resistors: https://s.click.aliexpress.com/e/_dTPpXjt

1x 4N25 Optocoupler: https://s.click.aliexpress.com/e/_AERtjq

1x MOC3052 Optocoupler: https://s.click.aliexpress.com/e/_AeCdJW

1x BTB26 Triac: https://s.click.aliexpress.com/e/_AfaGfw

1x 5V Power Supply: https://s.click.aliexpress.com/e/_A4fEFi

1x FBR: https://s.click.aliexpress.com/e/_AUMFys

Here you can find the schematic of the project along with reference pictures of my finished board.

Here you can find the code for the Arduino Nano. UPLOAD IT! And maybe understand it along the way ;-)

Here you can find the .stl files for the enclosure as well as reference pictures of my finished project.

You did it! You just created your own AC Softstarter!

Feel free to check out my YouTube channel for more awesome projects: http://www.youtube.com/user/greatscottlab

You can also follow me on Facebook and Twitter for news about upcoming projects and behind the scenes information:

https://twitter.com/GreatScottLab

https://www.facebook.com/greatscottlab