The SGS Thompson L293D is one of the most common motor driver chips, with built-in protection from the abuse motors can create.
The SGS Thompson L298 motor driver chip is a brute of a motor driver, designed for up driving 4 amperes at 46 volts.
The LM339 is very similar to the LM324 but with open collector outputs.
A little 8 pin DIP that can be hacked into a light or line following robot known as the "Herbie".
The LM393 is a dual-comparator chip that is the heart of the popular "Sandwich bot" project in the book "Robot Building for Beginners"
Low voltage dropout regulator.
A 28 pin 8 bit microcontroller in a DIP package as used on the Sumovore Atmel Brainboard add-on.
Fairchild 555 Timer IC
Standard 1N914 Silicon Diode for general purpose circuit design.
We found a limited quantity of excellent Schottky diodes that have lower-than-usual voltage dropout
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