Hacker News new | ask | show | jobs
by DonHopkins 308 days ago
I got a used 1950's era Erector Set from a garage sale as a kid, which had diabolical plans for building the "ERECTOR ELECTRIC THRILLER", that used the un-plugged-in AC electric motor's coil with flashlight batteries and a crank that turned a gear to break the contact and zap pulses of electricity to the handles.

Of course I built it and attached the handle to the inside door knob of my room, then tricked my brother into holding one handle then grabbing the outside doorknob, then I turned the crank, to condition him to stay out of my room!

I found the instructions on page 51 here:

https://www.constructiontoys.it/wp-content/uploads/2015/09/E...

INSTRUCTIONS FOR BUILDING THE ERECTOR ELECTRIC THRILLER

This amazing little device will provide lots of fun for yourself and many thrills for your friends. This thriiler is actually a device for giving your friends a slight shock. It is absolutely harmless in every respect.

OPERATION OF MODEL

If someone holds the handles, one in each hand, and you crank, they will get a thrilling shock. This happens because the three-volt circuit from the flashlight cells passes through the motor coils to magnetize the iron in the motor. As the crank is turned, the gear leaves the contact spring, the current flow through the coils is stopped, and the magnetism in the iron suddenly breaks down, generating a high voltage in the opposite direction to that of the battery. As the battery circuit is momentarily broken, this current cannot flow through the batteries, so it flows through the handles and then through the person holding the handles. The intensity of the shock may be changed by turning the crank fast or slow.

Here are two suggestions for having fun with your Erector Electric Thriller. Have a group of boys and girls form a circle, holding hands. Each person at the end of the circle should hold one handle of the Thriller. When the crank is turned, the current will pass through everyone, but with a lower intensity. Another trick you can have a lot of fun with is to place a tin pan of water on one of the handles or connect it to one of the handles and place a coin in this tin pan of water. Have a person hold one handle and, with the other hand, try to pick the coin out of the water while you turn the crank.

Edit: OMFG I found the plans for my very first robot on page 89, "The Mysterious Walking Robot Model", with tank tread feet, motorized walk, and glowing lightbulb eyes!

https://www.constructiontoys.it/wp-content/uploads/2015/09/E...

1 comments

> un-plugged-in AC electric motor's coil

an important instruction, perhaps

> It is absolutely harmless in every respect.

There is probably an argument here both for and against toy safety standards.