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In this paper experimental results for a linear generator with different end-effect constraints to obtain a qualitative comparison for adjusting the linear generator geometry (windings length and stator length), are presented. The use of linear generators in energy harvesting systems is very common nowadays. One of the problems of this kind of electric generators is an induced voltage distorted due to end-effects. The end-effect is produced by the rotor speed change at the borders of the electric generator and impacts directly on the induced voltage waveform and in the energy flux to the load. However, is not included usually on the methodology design of linear generators. The proposal presented in this work allows obtaining a sinusoidal induced voltage waveform instead of a pulsing induce voltage waveform as has been reported in literature. [ABSTRACT FROM AUTHOR]