2021-03-28

[public] 245K views, 10.8K likes, dislikes audio only

GreatScott!

$2 for 1-4 Layer PCBs, Get SMT Coupons: https://jlcpcb.com/AAA

Previous video: /youtube/video/oTUZQDpQcU4

MOSFET Driver Part 2 video: /youtube/video/B7Eqrf2M-Iw

Everything you need to know about Transformers! video: /youtube/video/2cxcP5lY7K4

Solid State Relay video: /youtube/video/2UtL2uAYCUA

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Support me for more videos: https://www.patreon.com/GreatScott?ty=h

More project information (schematic, code,.....) on Instructables: https://www.instructables.com/How-to-Make-an-AC-Softstarter/

Parts list (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

In this project video 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!

Thanks to JLCPCB for sponsoring this video.

Visit https://jlcpcb.com to get professional PCBs for low prices.

Music:

2011 Lookalike by Bartlebeats

Killing Time, Kevin MacLeod

(incompetech.com)

0:00 Showing off the autotransformer

1:04 The problem with the transformer

1:40 Intro

2:13 Functional Principle of an autotransformer

4:27 Finding the problem

5:52 The reason for the problem

7:10 DIY Solution 1 (Simple)

8:15 DIY Solution 2 (Softstarter)

10:33 Final Test & Assembly