N&V 2019 Issue-3

Features

DIY Biotech: Gel Electrophoresis

Solve your own DNA mysteries with gel electrophoresis.

CNC Routers: Backlash

Whether you own or intend to build/buy a CNC router, make it a habit to routinely check for backlash.

Parallel Processing with the Propeller FLiP

Take an in-depth look at the Propeller FLiP board from Parallax.

Monitor Motion from a USB Webcam

Take a look at how this highly configurable and stable monitoring system works.

Getting Started in DIY Modular Synthesis — Part 2

Take a look at five synthesis building blocks.

An Elegant Approach to Design a Variable Voltage Divider

These design ideas for voltage dividers really add up.

A Simpler Current Limiter

Using light bulbs to limit current.

Restoring the Heathkit ES-400 Computer

Refurbishing the “Big Kahuna” of Heathkits.

Learn to Send and Receive Morse Code with the Morserino-32

Review of the Morserino-32 CW Trainer.

Projects

Build a Pocket-Sized Altair Computer

Make a retro PC that fits in an Altoids tin.

Build a Digital Light Saber

Create “light graffiti” with this fun project.

Build a Small Powerful Dummy Load

Use this device for testing that costs less than $5 to make.

Columns

Q&A
by Kristen McIntyre
Electronics Q&A (03.2019)
Questions on turn-signal light bulb flashing rates, specs on ignition cell batteries, and version control systems.

Open Communication
by Louis E. Frenzel
Whatever Happened to these Wireless Technologies?
A list of “forgotten” standards and services.

Departments