[Swansea Hackspace] ESP8266 Door Bell

[Justin Mitchell]

On Fri, 2017-06-30 at 10:08 +0100, Matthew Daubney wrote:
> Hello!
> 
> I started looking into making one of these quite some time ago, and
> it's finally come around on the list of things to do. I'm happy
> getting the vast majority of stuff working, what I'm really unsure of
> and struggle to understand  is how to build a latching, releasable
> transistor switch so the thing comes on with button, then turns
> itself off when it's done.
> 
> Could anyone walk me through one of these and tell me what kind of
> transistors I need to build a prototype? Are there also any suggested
> board houses that people use?

Andreas Spiess has a few videos on making these kinds of internet
button device which might give you some ideas.

e.g. https://www.youtube.com/watch?v=6JD2RMDM88Y