ESP8266 Community Forum

- Wed Aug 29, 2018 8:01 am #77995 I doubt it's possible in the UK.

btidey beat me to it - I've never seen a neutral in a UK light switch It's extremely annoying but there's not a lot we can do about it!

If you can access the wiring at the lamp there is obviously a neutral there & a Sonoff would do what you want.

Ian

- Wed Aug 29, 2018 8:28 am #77997

I doubt it's possible in the UK.

btidey beat me to it - I've never seen a neutral in a UK light switch It's extremely annoying but there's not a lot we can do about it!

If you can access the wiring at the lamp there is obviously a neutral there & a Sonoff would do what you want.

Ian

I have neutral in my switches. New build house.

- Wed Aug 29, 2018 5:18 pm #78004 The Sonoffs are very good value for money but I like to put stuff together myself for added flexibility.

This is an example of home built relay module I use in several apps.

Major components are ESP-12F (£1.50), Hi-Link 3.3V PSU(£2.00), Songle 3.3V relay(£0.50). Other bits probably come to less than £1.00.

Dimensions are 57 x 32 x 21mm.

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- Wed Aug 29, 2018 8:47 pm #78007 When I see that kind of construction, prototype boards, I worry about aigap and clearances between pads when used with higher voltages. When using those boards with higher voltages I strongly suggest cutting out the pads and holes that are not being used around the connections with applied high voltages.

I used to design boards with a 0.075" minimum gap between high voltage traces. 0.072" was the minimum allowed in most of the categories we have our products approved to. Now with harmonization of standards the requirements are even wider spacings.