Electrical and electronic experiment device

The invention relates to an electrical and electronic experimental device, and discloses an electrical and electronic experimental device, and a programmable power supply unit of the electrical and electronic experimental device comprises a voltage drop module, a single chip microcomputer control module, a driving module, a sampling module, a switching power supply module and a sampling feedback module, the voltage drop module is used for reducing the voltage input by the programmable power supply unit; the sampling module is used for collecting input voltage; the voltage after voltage reduction processing is transmitted to the driving module and the single-chip microcomputer control module; the single-chip microcomputer control module is used for collecting input voltage and controlling output, and the driving module is used for driving the voltage output by the single-chip microcomputer control module. Meanwhile, the output voltage is fed back to the single-chip microcomputer control module through the samp