Putting the Raspberry Pi to sleep

As much as I wanted the SmartUPS to work for the OspreyCam project, I decided to take a look at the Spell Foundry Sleepy Pi instead. The Sleepy Pi is basically an Arduino board with regulators and switching transistors to control the power to ...

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Here are some notes for connecting a Digilent XC2-XL CPLD board to a standard 20-pin JTAG header.

Note that Pin 1 for J1 is at the bottom of the board, closest to the J1 label (also has a square pad on the solder side).

In OpenOCD 0.8.0, the ...

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Parallel Port Miscellany

by Charles Lepple

Introduction

Parallel port documentation for IBM PC compatibles can be inconsistent. Most sources quote other sources, and little information is based on first-hand experience. This document is meant to remedy this shortfall.

Overview

The PC parallel port outputs TTL-compatible logic signals, although in most ...

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