This circuit is from an 80's publication. It makes use of small 6 V x 50 mA incandescent lamps. The diodes can be general purpose or even 1N4002. The transformer is 6.3 V with 100 mA or more current.
We found this circuit at a January 1991 Modern Electronics. The magazine no longer exists, but the...
With the figure circuit it is possible to control the amount of heat generated by the heating...
This circuit was obtained from a Texas Instruments 1985 document. The circuit is powered by 1.5 V...