DIY Dew heater controller (PWM)

[BinocularSky]

Dew strap controller (PWM) done at last (waited ages for some kit from China). 4 x 10W channels, individually fused, switched & controlled, channel switch LED brightness indicates power output. 12V 5A DC input switched & fused.

 

 

Compared to the cost of a 'bought' one, I'd need to value my time at less than youth minimum wage, but you can't put a price on smug self-satisfaction :-)

 

Circuit idea shamelessly nicked from http://www.blackwaterskies.co.uk/2013/05/a-cheap-multi-channel-dew-heater.html

[Daz69]

A nice tidy build, well done. I'm starting my distribution box build today. Delivery from China is a right PITA isn't it. Sometimes you feel it's worth spending a few quid more just to get it from the UK to speed things up. I waited ages for my PWM's from China too.

Where did you find the fuse holders?

Daz

[abhoriel]

I ordered my PWMs from China between Christmas and new years... still waiting!

[BinocularSky]

@abhoriel The PWMs arrived very quickly (ordered 30 Dec, arrived 7th Jan), it was the illuminated switches that took so long.

@Daz69 https://www.amazon.co.uk/gp/product/B007Q82F98/

[Alan White]

Nice build Steve.

My PWM's were ordered at start of November and arrived early January.
Clearly it's a bit pot luck.

[Daz69]

8 hours ago, BinocularSky said:

 

@Daz69 https://www.amazon.co.uk/gp/product/B007Q82F98/

Thanks for the link, found some on the bay with delivery by Wednesday, fed up with China Post. 

[wormix]

Just copied this exactly as I had most of the parts and I haven't even started sourcing the components for my Robert Brown. 
 

Another excuse to use my 3D printer too!