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This project builds a test rig for studying electromagnetic relay characteristics: a variac feeds adjustable voltage to a plu...
This project builds a resistive load bank for testing small generators: banks of nichrome heating elements switch in stepped...
This project builds a working flyback switch-mode power supply on an open demo board: a PWM controller drives a MOSFET switch...
This project builds a motorized sieve shaker: a stack of standard test sieves is clamped on a spring-suspended platform drive...
This project builds a torsion testing machine: a shaft specimen is gripped between a fixed chuck and a rotating chuck, torque...
This project builds a working Brinell hardness testing rig: a lever arm multiplies slotted dead weights to press a hardened s...
A human-powered grain winnower: the operator pedals like a bicycle, a chain-and-belt drive spins a centrifugal fan, and grain...
A gimbal-mounted gyroscope rig that makes gyroscopic effects visible: a balanced brass rotor spun up by a DC motor sits in a...
A working epicyclic (planetary) gear-train rig: an 18-tooth sun gear, three 24-tooth planets on a carrier, and a 66-tooth rin...
