Enjoyed the video Brad, I gained some knowledge that before yesterday wouldn't have known to ask about - the swing itself.
During tests, whatever has been tried has resulted in either a push away to a small distance from the coil or an attract that left it sitting right on top of it. The realisation ? weight ! My assembly is too light !
Watching your video, the magnet goes up further on the swing back than the swing forward.
The weight of the assembly is what is swinging it through the downward interaction and out to be pushed upward further.
I think JB managed to gain a Patent because the use was to charge a battery. His circuit has the protection diode, 2 batteries and a wheel full of magnets rather than 1. It obfuscates very well even if the magnetic switching principle is the same. Would be interesting to see if the examiners included the 1974 Patent in the listed Searches.
A catch up, i've been looking at the Top Secret spinning top toy and fixed it. When attempting a replication some time ago a wire snapped, but it's now repaired and it works fine. It's the same principle and the device itself is right there in the 1974 Patent.
However, this seems to have 6 wires
It uses an S8050 transistor, 700mA capable, overkill lol
I made a coil of similar dimensions to the original, to try on it. Used 30AWG and 40AWG that were already bi-filar from a previous project and wound them onto a coil form from an old TV. The form had ferrite down the middle. It hasn't worked, probably due to just 20ohms on the 30AWG, 154ohms on the 40AWG, 900 turns.
Although it didn't work, it was a huge amount of fun after putting a '472' (4.7K) variable pot on the base. The thing makes sci-fi warbling noises when the spinning top is above the coil
The pot increases the frequency, from about ~8KHz to above audible.
Will try the 'dancing' coils on it for sure today.
I have some 40AWG and will make a coil that's similar to the Patent description drawing, 500 turns and 1500 turns, rather than 1:1 bi-filar.
That coil will also be used on the pendulum, to see if there are differences.
And - the Protek oscilloscope gave a trace signal last night on the pendulum WOOT!
The trace does have a negative dip (will get vid or a pic today).
When I first got it, some of the buttons and switches seemed a bit loose. The 'On' light would go off and on quite randomly too. Then it seemed to only work for detecting mains hum, which was odd. Found that it's got flaky worn pots, because if I move them just right it works. It's just like old audio amps, where you can hear scratching as you move the volume control or something.
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Topic: Dolphins Rock ! (Read 24766 times)
