Silkscreen lables of Maxwell's equations, Ohm's law, Kirchhoff's law, formulas for resistance and impedance and equation for rms and average voltage.
Gold plated conentions (ENIG), in the ENIG process the copper pads are protected by a coating of nickel, and a layer of gold protects the nickel during a prolonged storage.
Description
Pocket size prototype soldable breadboard PCB type: Double-sided Color: Blue Dimensions: 3.5"x2" (88.9mm x 50.8mm) Thikness: 1mm Through hole diameter: 0.036" (0.91mm) Mounting holes: 2xM3 and 4xM2 Trace width: 0.05" (1.27mm)