This triac circuit was found in the October 1987 Radio Electronics magazine. The triac is load-dependent and must be mounted on a heat sink.
April 2017 - The new Recon Jet ™ Pro which is Smart Glasses from Intel® can be obtained from...
This one-transistor alarm can be used with much more sensors than the two shown by the figure....
This Popular Electronics circuit can be found in various versions on this site and in this...