From bigclivedotcom.

A 1990’s chaotic pendulum ornament with a dramatically different approach to the electronics compared to the WildWOOD pendulum featured in another video.

Although the circuitry is vastly simpler, the power use of this ornament is still very low. If anything, the 9V battery it is intended to be used with is a bit too high. It worked well on 5V and was still swinging all the way down to 3V. With the 9V battery the UFO often swings wide enough to hit its support.

I did a test. I put a flyback diode across the low resistance kicker coil, and it didn’t affect the operation at all. In a previous video I scoped a pendulum circuit like this and the voltage spikes from the collapsing field were very high. The diode should shunt them and make life easier for the transistor.

This device also has the odd addition of reed switches in the UFO itself, which blink dim red LEDs randomly as it moves. That also results in very annoying continuous clicking noises as it runs.

Unlike the WildWOOD pendulum, this one seems to have been mass produced, so you may find them on eBay in the USA from time to time.

Or if you have patience, you could make your own version. It should be straightforward to 3D print the parts for a pendulum ornament like this.

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