This basic equipment set is intended for investigating the electron spin resonance (ESR) of an unpaired electron of a DPPH sample, as well as, the nuclear magnetic resonance (NMR) of glycerin, Teflon®, and polystyrene. Resonances are observed via induced transitions through high-frequency pumping of an external magnetic field. Resonance absorption curves can be represented with a simple dual-channel oscilloscope or with the 3B NETlog™ unit.