Grant Tudor <grant.tudor <at> gmail.com> writes:

> incubator using a DS18B20. Two heating elements (basically ceramic light
> globes) are turned on / off via a solid state relay. A simple 2 x 16 LCD

> 2. Although there are two heating elements, there is currently no simple
> way of determining if both are working. I was thinking of some sort of
> current drawn monitoring circuit that could visually indicate that the
> heating element is working. Another option may be to put another

Since these are light globes, you can use photo sensors such as phototransi=
tor,
or even a CdS cell that would "look" at one lamp using proper light shieldi=
ng.=20
If this works, it's hard to beat the price and simplicity of that arrangeme=
nt. =20

Sergey Dryga
http://beaglerobotics.com



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