This video presents a detailed teardown and reverse engineering of a vintage "Wildwood pendulum," a unique electronic chaotic pendulum. The creator reveals its distinctive wooden, hand-assembled construction, featuring a low-friction magnetic pivot and an air-core kicker coil. The core of the video focuses on the surprisingly complex, entirely hand-wired transistor circuit responsible for its operation. This circuit is analyzed in detail, highlighting its efficient design that delivers a single, precise 5mA pulse per magnet swing, resulting in negligible quiescent current and extremely long battery life. The video contrasts the Wildwood pendulum's artisanal craftsmanship with a mass-produced plastic clone, emphasizing the original unit's status as a rare piece of functional art.
Summarizing the Wildwood Pendulum: A Deep Dive into its Hand-Crafted Engineering
0:00 Introduction to the Wildwood Pendulum: The video begins with an unusual angle to showcase the Wildwood pendulum, an electronic chaotic pendulum with a kicker coil, acquired long ago from a gadget shop in America.
0:35 Distinctive Wooden Construction: The pendulum is characterized by its hand-assembled wooden components, including a base, angular stem, and a wooden pendulum itself, featuring a ceramic magnet at its base and a custom cap with a spike for a low-friction magnetic pivot.
1:30 Battery Compartment: The battery, a PP3 (lithium core with a boost circuit), is accessible by lifting a felt cover, secured by a magnet.
2:24 Internal Magnet Array and Air-Core Coil: Inside, five magnets surround an air-core coil, which the pendulum interacts with. The creator notes the unusually complex circuitry accompanying this air-core coil.
3:07 Hand-Assembled and Unique Circuitry: Reverse engineering reveals that the coil, made of 500m of fine wire, is paired with an entirely hand-assembled circuit, distinct from typical pendulum designs. This indicates it was not mass-produced and is a piece of "handmade art," manufactured by Andrews Manufacturing Co. in Eugene, Oregon.
4:15 Treat as Art: The creator emphasizes that original Wildwood pendulums should be treasured as unique art pieces, especially due to their distinctive circuitry.
4:33 Highly Efficient Circuit Design: The circuit, employing three transistors (one NPN, two PNP), is designed for extreme efficiency. In its standby state, it draws virtually negligible quiescent current.
5:55 Precision Pulse Operation: When the pendulum's magnet swings past the coil, it induces a negative voltage, triggering a precisely timed circuit that delivers a single, distinctive 5mA pulse to the coil, sustaining the motion.
7:16 Extended Battery Life: Due to the circuit's minimal quiescent current and efficient pulsing, the battery is expected to last an exceptionally long time.
7:28 Manual Start & Diode Protection: Unlike some pendulums, it doesn't self-start, allowing it to be held still. A diode protects the transistor from the coil's inductive kickback.
7:56 Comparison to "The Visitor" Clone: The video compares the original Wildwood pendulum to a plastic, mass-produced clone called "The Visitor," which uses a significantly simpler (coil and single transistor) circuit, likely resulting in shorter battery life.
8:32 Art vs. Mass Production: The Wildwood is highlighted as "made in America by hand and it is art," while the clone is "made in China by machine and it is not art," underscoring the craftsmanship of the original.
8:48 Maintenance Tip: A dab of Vaseline on the pivot can help prevent wear, ensuring the pendulum's longevity.
9:13 Conclusion on Value: The creator concludes by expressing increased appreciation for the Wildwood pendulum, recognizing the immense work and unique artistry involved in its handmade circuitry.