Re: gEDA-user: home made hot plate

[Wojciech Kazubski <wk0@xxxxx>]

I am using a high power wirewound resistor to solder small SMT board (poststamp size) with 433MHz radio modules. The resistor is 6.8 ohm ceramic block some 40mm long and 12mm wide, with a flat surface,on which the board can be placed. The resistor was saved from old discarded TV set. After connecting to some 9V from bench power supply it heats up to solder melting point.

Wojciech Kazubski

> Seeing DJ's hot plate photo brought to mind a link I once saw, where a 
> guy built a home-brew SMT hot plate.  I can't find the link, but as I 
> recall, he used a few low-ohm high-watt power resistors epoxied to a 
> piece of aluminum sheet.  He drove it with a 0-30V bench supply and 
> controlled the temperature manually by varying the voltage.
> 
> Seems to me that one should be able to build a pretty good hot plate 
> that way for not a lot of money.  Although I would think that copper 
> might give more uniform heat spreading than aluminum (at much greater 
> expense, however, unless you get lucky).  And a thermostatic temperature 
> control shouldn't be hard.
> 
> -dave
> 
> 
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