Well looks like I can just wire up either a Transient Voltage Suppresor Diode or a Varistor. Or both lol. I gotta look into how to wire them up more, but that might be the way to go. Maybe the attachment of a varistor is a good idea in any case, they seem to protect well and last quite long as long...

I was considering using a photo-resistor (LDR) to detect the on/off state of a radiant electric heating element. Now i see that the standard CdS cells have a limited wavelength range in which they are sensitive: http://www.resistorguide.com/photo-resistor/ From this information it appears i would be...

Its a pity to see that good candidats with less money do not have a chance to get through...