Replacing The 555 With A PIC — Part 5 — A Digital Analog
This is the final installment that looks at the circuits from the book, 555 Timer IC Circuits by Forrest Mims, which were not covered in any of the preceding four articles.
Replacing The 555 With A PIC — Part 4 — A Digital Analog
This forth article discusses the more complex circuits. from 555 Timer IC Circuits by Forrest Mims.
Replacing The 555 With A PIC — Part 3 — A Digital Analog
This third article discusses the less complex audio oscillator circuits. from 555 Timer IC Circuits by Forrest Mims.
Replacing The 555 With A PIC — Part 2 — A Digital Analog
This second article examines several of the circuits from 555 Timer IC Circuits by Forrest Mims, that are used basically as a monostable multivibrator.
A2D Signal Processing
One of the limitations of many low cost, single supply, analog-to-digital (A/D) converter ICs today is that they have a limited input voltage range. This article discusses various ways to implement input processing to allow these devices to operate in the real world. I use the ADS7870 as an example A/D, but the equations and samples are generic enough so that you can configure the circuits for other devices...
Audio Spectrum Analyzer
The device described in this article is a configurable audio spectrum analyzer. Many of you have probably seen spectrum analyzers on some higher-end audio equipment, as well as within the GUI of many audio deck programs on your PCs. The function of a spectrum analyzer is to view the frequency components of a signal. One way to state the difference between an oscilloscope and a spectrum analyzer is that with an oscilloscope, you see time domain presentations; with a spectrum analyzer...