Heavy Ferrite has a large ferrite toroid core for the base. It is
also the transformer for the circuit. Wound with 18 gauge formvar
CDS cell on top of its head will turn it off during the day. At
night Heavy ferrite will glow its red led eyes all night long. A
vintage pheonic transistor socket holds a 2N2222 transistor.
The blue trimmer sets current draw when glowing and sensitivity to the
Top and back view. Power switch mounted on the back.