  We construct electronic oscillator from acellular slime mould Physarum
polycephalum. The slime mould oscillator is made of two electrodes connected by
a protoplasmic tube of the living slime mould. A protoplasmic tube has an
average resistance of 3~MOhm. The tube's resistance is changing over time due
to peristaltic contractile activity of the tube. The resistance of the
protoplasmic tube oscillates with average period of 73~sec and average
amplitude of 0.6~MOhm. We present experimental laboratory results on dynamics
of Physarum oscillator under direct current voltage up to 15~V and speculate
that slime mould P. polycephalum can be employed as a living electrical
oscillator in biological and hybrid circuits.
