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This is Lesson 4 in the Learn Arduino Adafruit series. In this lesson, you will learn how to use eight LEDs using the 74HC595 shift register chip.
Adafruit Optical Fingerprint Sensor
All-in-one fingerprint sensors make ID easy
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Secure your project with biometrics - this all-in-one optical fingerprint sensor will make adding fingerprint detection and verification super simple. These modules are typically used in safes - there's a high powered DSP chip that does the image rendering, calculation, feature-finding and searching. Connect to any microcontroller or system with TTL serial, and send packets of data to take photos, detect prints, hash and search.
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Adabot tells time. You can too!
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Using the Adafruit Wave Shield for Arduino, this chatty clock can be customized with your own voice.
Current Limiting Stepper Driver with DRV8871
Got big motors to drive? Call in the choppers!
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This tutorial shows how to combine 2 DRV8871 motor drivers to create a high-performance "Chopper" style stepper driver. The current limiting feature of this H-bridge chip allows you to drive bigger motors, or squeeze more performance from your existing motors.