Arduino Mega 3.3 V I/O Level-shifter kit

Adruino Mega shield providing 20 bidirectional 5.0 V to 3.3 V I/O lines. Kit version.
Given the Arduino Mega operates at 5 V logic levels, it can be a problem to interface to a 3.3 V logic level circuit. This shield is the solution to the problem.

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Arduino Mega SRAM expansion shield kit

Adruino Mega shield providing 448 kB of extension memory. Kit version.
The Ardiuno Mega boards come with only 8 kB SRAM, which seems enough until it ain't! This shield is the solution to the problem.

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Tech Note: 50 ohm TTL line driver

Tech Note for the 50 ohm TTL line driver.

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Version 2.0 - Arduino Mega SRAM expansion shield

A new version of the Arduino Mega SRAM expansion shield PCB is on its way! Some minor, but hopefully valuable additions to the shield are now included...

Tech Note: Arduino SRAM expansion

Tech Note for the Arduino Mega SRAM expansion shield.

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Tech Note: Bidirectional logic level shifting

Tech Note for the Arduino Mega 3.3 V I/O level-shifter shield.

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