Electronics-Salon 1uH to 1000uH E12 Standard 37 Values Programmable Inductor Board.
Electronics-Salon 1uF to 9999uF Step-1uF Four Decade Programmable Capacitor Board.
Electronics-Salon 1R - 9999999R Seven Decade Programmable Resistor Board, Step 1R, 1%, 1/4W.
littleBits Electronics Synth Kit