Design and construction of a biominilab for biomedical research

The authors report the design of an integrated electronic system that supplies the necessary functions of biomedical research. The equipment comprises the following modules: an amplifier of bioelectrical signals with rechargeable batteries as the power source, an electric current injector, a clamp system, a cassette recorder converted to modulate frequency, a multiplexor for four-channel recording of slow bioelectrical signals, an interphase which transforms a cheap common oscilloscope into a memory one, and a radiofrequency lesion generator