Supplemental Kit (for experiments 15 through 24). This kit contains the parts needed for Make: Electronics Second Edition by Charles Platt. Make: Electronics, 2Ed by Charles Platt : From Maker Shed Make: Electronics, 2Ed by Charles Platt : From Barns & Noble To use this kit, you must also own the Entry-Level Kit. Some of components from that kit must be combined with the components in this kit. You do not need to own the Soldering Kit. The Supplemental Kit contains the following components and quantities: (4) Generic red LEDs (1) Yellow LED (1) Green LED (15) Red low-current LEDs (2) Slide switched (8) Tactile switches Trimmer potentiometers 20K (1) and 100K (1) (4) 1N4148 diodes (2) 1N4001 diodes (2) 2N2222 transistors (1) LM7805 voltage regulator (4) 555 timers (3) Seven-segment LED numeric displays (3) 4026B counters (1) 74HC393 counter (1) 74HC00 NAND chip (1) 74HC08 AND chip (1) 74HC32 OR chip (1) 74HC02 NOR chip (1) 74HC27 NOR chip necessary resistors and capacitors for the experiments listed.