Features
Visual Hexadecimal
by Dinal Andreasen
Memory association techniques can ease the hexadecimal struggle.
Marvelous Magnetic Machines
by Victor Chaney
See how to make magical motors from spare parts.
An Easy CATV Coax Antenna
by Bob Fischer
Make antennas from unexpected materials.
Transformer Based Power for Nixies
by Bryant Julstrom
Discover a new way to power your Nixies.
Adding FM Capability to an All American Five AM Radio
by Dick Whipple
Get FM capability without destroying the AM portion of your AA5 tube-type radio.
How You Can Intercept Secret Messages Being Sent to Spies
by David Goodsell
Unidentified radio broadcasts have been transmitting coded messages using numbers for years.
Can’t Keyboard? Use Morse Code Instead
by Jon Titus
Can’t easily use a keyboard for text? Dot and dash it!
Oscillators, Statistics, Q, and Muons
by Tom Bensky
Learn how to determine how well your oscillator is behaving.
Restoration of an Abused 1965 McIntosh C22 All-Tube Preamp
by Bryan Bergeron
Next in our restoration series, we’ll help out an abused 1965 McIntosh C22 all-tube preamp.
Projects
Measuring the Air Quality Index
by Victor Chaney
Know if it’s safe to go outside.
Build a Wireless Doorbell Pager for the Deaf
by Roger Secura
Here’s a simple circuit you can build for those who have lost their hearing.
Build a Super-Secret Invisible Burglar Alarm
by Jim Tarchinski
Keep valuables safe and expose kids to technology at the same time.
Build the LASERVox MIDI Laser Theremin
by Jim Arlow
Make music by waving your hands at one of the most expressive musical instruments ever built.
Departments
New Products (03.2020)
High-res 2/4/8 Ch 20 MHz Oscope, Gerber File Option Added, Insulated Banana Jack Attenuators, Triple Output DC Power Supplies, AC-DC Controller Features Second Side MCU, SnapEDA Library Integration
Developing Perspectives
Electronics: What’s Important from the Outside Looking In?
by Bryan Bergeron
Here’s how to do good by your favorite electronics hobby.
Reader Feedback (03.2020)
Comments from readers.
