TIP120 Darlington Transistor (3-pack)

Adafruit Perma-Proto Half-sized Breadboard PCB - Single

Half-size solderable prototyping PCB laid out like a breadboard. Use after a breadboard works, not as an active module.

5mm LED Pack (50 PCS)

Pack of simple 5 mm LEDs in multiple colors. Use with suitable current limiting and GPIO or driver design.

Premium Female/Female Jumper Wires - 40 x 6

Female-to-female jumper leads for joining male header pins. Match gender and length before substituting.

Premium Female/Male 'Extension' Jumper Wires - 40 x 6 (150mm)

Female-to-male jumper leads for extending a header connection. Similar length to the female-to-female pack, but different end gender.

Flora RGB Smart NeoPixel version 2 - Pack of 4

Addressable RGB NeoPixel boards. They need power, ground and a timing-sensitive data signal, not just LED current limiting.

Arduino Leonardo Microcontroller

ATmega32u4 controller board with built-in USB. Treat as a complete controller, not a connector or accessory.

TMP36 Analog Temperature Sensor

Analog Celsius temperature sensor. Needs an analog input and voltage conversion in firmware.

Big Easy Driver

Bipolar stepper motor driver board based on the A4988 family. Needs motor supply, current limit setup and step/dir control.

SparkFun DeadOn RTC Breakout - DS3234

DS3234 real-time-clock breakout with SPI interface. Use when the design needs a clock source.

Micro SD(TF) Storage Board

MicroSD storage breakout. Use when the design needs removable storage through a controller interface.

RTC Module - Super Capacitor

Super-capacitor RTC module intended for Raspberry Pi-style timekeeping, with Arduino use also described by Seeed.