Everything for Electronics

John E. Post

John's Articles

FM Reception with the GNU Radio Companion
February 2020
Have fun building FM broadcast band receivers using GRC and learning about SDR.

How To Basics: Intro to Heatsink Selection and Installation
July 2009
Don't get burned on your next build. The proper heatsink can save you from burnt fingers and burned up devices!

A Universal Direct Conversion Receiver For PSK-31
May 2009
Exclusive Online Article: Decode and read text message communications being sent over shortwave amateur radio frequencies.

A Simple Superhet
March 2008
This circuit is just about the simplest, fully functional superheterodyne receiver one can construct with just a handful of parts.

Inverting and Non-inverting Amplifier Design Using Op-Amps
October 2008
This article discusses simulation results for both inverting and non-inverting amplifiers, using the uA741 op-amp. Additionally, the article highlights how overall amplifier performance is affected by the gain and bandwidth limitations of the op-amp, as illustrated by PSpice simulations. The uA741 operational amplifier is discussed because it is included in most versions of PSpice, so you can easily repeat the simulations on your own...