Build The Poor Man’s Seismograph.
Read about some of the options you have to create your own professional looking diagrams.
A PIC-based, DIY seismograph that uses old school pendulum technology.
If you’d like to break free from your “hanging tennis ball” method of parking, check out this approach which utilizes two ordinary low power laser pointers.
TechKnowledgey
by Jeff Eckert
TechKnowledgey 2012
This month, read about really twisted radio, no-compromise sound from your PC, a sonic screwdriver, plus some other interesting stuff.
The Spin Zone
by Jon Williams
The Spin Zone
Back to the Beginning.
Q&A
by Russell Kincaid
Q & A
AC ammeters, battery internal resistance, and transformerless power supplies are discussed this time.
The Design Cycle
by Fred Eady
The Design Cycle
Control Gadgets With Your Smart Phone.
Near Space
by L. Paul Verhage
Near Space
Making One Camera Do the Work of Three.
Smiley’s Workshop
by Joe Pardue
Smiley’s Workshop 46: Chaser Light Marquee
C Pointers, Arrays, and Structures — Part 3-46: Chaser Light Marquee
Fundamentals For Beginners
Build a Nose Beeper
With this circuit, when you touch your friend’s nose you can make the speaker sound.
