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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.