This circuit, from a 1988 documentation, consists of an automatic temperature control using an NTC sensor. With it you can mount a broiler for quail eggs, remembering that the source of heat, an incandescent lamp must be covered, because the light can blind the birds that are born. One should also protect against direct contact as they would burn. The filter shock has 50 turns of 24 wire on a ferrite rod. The triac should be mounted on a good heat sink.
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