This month we had a number of things going on,
including a paintball party for Thomas' and Peter's
birthday, as well as
the construction of a Quarter Shrinker
for Peter's science class.
 Flash, Lens 7.0mm, Time 0.022 s (1/45),
Aperture f/2.0, ISO 100
| The charging circuit again | Peter standing next to the quarter smasher
|  Flash, Lens 7.0mm, Time 0.022 s (1/45),
Aperture f/2.0, ISO 100
|
 Flash, Lens 7.0mm, Time 0.022 s (1/45),
Aperture f/2.0, ISO 100
| The start of the closing contact.
We are trying to switch about 30,000 volts
from the capacitor to across the work coil is
as short of time as possible. |
|  Flash, Lens 7.0mm, Time 0.022 s (1/45),
Aperture f/2.0, ISO 100
|
 Flash, Lens 7.0mm, Time 0.022 s (1/45),
Aperture f/2.0, ISO 100
| The white standoffs are holding portions of the closing
switch. The saftey relay to the left is to discharge the
capacitor (and keep it discharged) when the system is not
is use. |
|  Flash, Lens 7.0mm, Time 0.022 s (1/45),
Aperture f/2.0, ISO 100
|
 Flash, Lens 7.0mm, Time 0.022 s (1/45),
Aperture f/2.0, ISO 100
| The closing contacts are two brass spheres. | The bottom sphere is held in place. The upper
one is attached to copper pipe that slides through
the Delron block to make contact with the lower block.
|  Flash, Lens 7.0mm, Time 0.022 s (1/45),
Aperture f/2.0, ISO 100
|
 Flash, Lens 7.0mm, Time 0.022 s (1/45),
Aperture f/2.0, ISO 100
| A simple (but high voltage) rectifier is used in the
charging circuit. | The meters and control knob. In the back you can see
the contact balls.
|  Flash, Lens 7.0mm, Time 0.022 s (1/45),
Aperture f/2.0, ISO 100
|
 Flash, Lens 7.0mm, Time 0.022 s (1/45),
Aperture f/2.0, ISO 100
| |
|  Flash, Lens 11.6mm, Time 0.022 s (1/45),
Aperture f/2.0, ISO 100
|
 Flash, Lens 7.0mm, Time 0.022 s (1/45),
Aperture f/2.0, ISO 100
| The first work coil placed across the back. | The system is now charging
|  Flash, Lens 7.0mm, Time 0.022 s (1/45),
Aperture f/2.0, ISO 100
|
 Flash, Lens 16.2mm, Time 0.022 s (1/45),
Aperture f/2.5, ISO 100
| The work coil after firing is a bit scorched. | Another coil.
|  Flash, Lens 16.2mm, Time 0.022 s (1/45),
Aperture f/2.5, ISO 100
|