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Interior electronic systems of GIZMO the Gepard R/C tank - There is no wasted space inside the hull of GIZMO. This view shows most of the electronic systems that control and animate the tank; a 4 amp-hour 8.4V Ni-Cad battery fills most of the space underneath the electronics.

The D-sub 9 connector for the turret umbilical wiring is in the center of the picture; the heatsink in the foreground is for the 10 amp 3 volt power supply that powers the xenon cannon strobes.

Because of efficient power system design, GIZMO can run for 5 hours on one charge.
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Flakpanzer Gepard Control and Animation System--Master Schematic - The multiple systems in GIZMO finally became so complex that a master schematic was needed to keep everything straight.

The stock Tamiya tank used three different types (and voltages) of batteries--4 NiCads for the radio, 2 alkaline C cells for the strobe, and a 6V lead-acid battery for the drive. I designed my system with one large Ni-Cad battery pack, and used voltage regulators for all of the systems.

This approach lets GIZMO run for 5 hours straight on one charge of the battery pack.
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Flight simulator game, internal view - This concept used twin endless-loop 8MM film projectors to provide two alternative tracks of visual material for a flight simulator game.

Similar in concept to the early video game consoles (Dragon's Lair) that used twin Laserdiscs to provide a branching flow of visual action based on the player's inputs, this did the same thing with much cheaper film-based equipment.

The projector drives were locked together with a driveshaft and U-joint setup.
Experimental programmable vehicles 1 and 2 - This was a project to design a simple-to-program electronic vehicle for younger users. These vehicles were an available toy that was heavily modified in support of the project with new electronics and gearboxes.
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Rear view showing control touchpads of 1 and 2 - The goal was to design a vehicle that was more intuitive and easier to program than the products on the market at the time.
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Solar Tracker system control panel - This is my home-made control panel for the charger and battery system that is fed by the power output from the Solar Tracker array.

The PV input, battery charge/discharge circuit, and the load circuit are all monitored by ammeters and protected by fuses.

The housing over the top row of meters has a small fluorescent tube inside for lighting, but I'm replacing it with white LEDs in the near future for lower power draw.

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