The paper describes the design of a magnetic stimulator for studying the effect of ferromagnetic nanoparticles on biological objects in a magnetic field. In a magnetic stimulator, an electromagnet acts as a source of exposure, which creates an alternating magnetic field. To register the magnitude of the magnetic field created a special device based on Arduino. The presented magnetic stimulator can be used in the study of biological objects in vitro and in vivo. The stimulant is made of inexpensive, readily available components.

Keywords: magnetic stimulator, ferromagnetic nanoparticles, alternating magnetic field, electromagnet

The manuscript describes the design of a simple LED illuminator for fluorescence microscopy of biological objects. As the light source, high-brightness semiconductor diodes were chosen that provide stable low-noise light. This distinguishes them from traditional light sources, such as mercury lamps. The presented light source can be used to record low-amplitude fluorescent signals in studies of excitable cells performed using calcium or potential-sensitive dyes. The illuminator is made of inexpensive, easily accessible components.

Keywords: high-brightness LEDs, illuminator, fluorescence, microscopy