Plasmodium of Physarum polycephalum was cultivated
in plastic boxes on wet kitchen towels and fed with oat
flakes. Culture was periodically replanted to a fresh substrate.
Electrical activity of plasmodium was recorded with
ADC-20 High Resolution Data Logger (Pico Technology,
UK). The data logger ADC-24 employs differential inputs,
galvanic isolation and software-selectable sample rates
all contribute to a superior noise-free resolution; its 24-
bit A/D converted maintains a gain error of 0.1%. Its input
impedance is 2 MX for differential inputs, and offset error
is 36 lV in ±1250 mV range use