Hello Art,
Yes on the real engine that is the dynamo.
It is driven from the camshaft and the distributor is driven from a gear on the end of the Dynamo.
On my engine I have adapted it the fire the ignition.
There is an Aluminium disk in there with magnets fitted to trigger a Hall effect sensor.
One of the main challenges is making the engine look like the original whilst having the functionality at the small scale.
Obviously the original has points in the distributor.
It is quite difficult to fit things in, so there are a few compromises.
The carburettor was another challenge.
Superficially it will look the same as the Austin Seven engine hopefully even to the trained eye.
Thanks
Tony