Everything for Electronics

Larry Cicchinelli

Larry's Articles

Build a Configurable Clock/Timer
April 2019
You’ll be “alarmed” at all the cool features this unit has!

Build a Customizable Musical Doorbell
September 2018
Select from among eight different tone sequences from a single doorbell switch, or up to four doorbell switches, each with its own tone sequence, for different doors/locations.

Replacing The 555 With A PIC — Part 5 — A Digital Analog
July 2018
This is the final installment that looks at the remaining circuits from the book, 555 Timer IC Circuits by Forrest Mims.

Replacing The 555 With A PIC — Part 4 — A Digital Analog
February 2018
This fourth article discusses the more complex circuits from the book, 555 Timer IC Circuits by Forrest Mims.

Replacing The 555 With A PIC — Part 3 — A Digital Analog
December 2017
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
May 2017
This second article examines several of the circuits from 555 Timer IC Circuits by Forrest Mims, that are used basically as a monostable multivibrator.

Replacing The 555 With A PIC — Part 1 — A Digital Analog
December 2016
Learn how to emulate a 555 or 556 using a PIC microcontroller — with no special programming required!

Build the Toilet Sentinel
October 2016
Build a Toilet Sentinel circuit that alerts you when the toilet flapper has not sealed properly, allowing water to continue to run.

DIP Meter with Digital Frequency Display
July 2016
Need a DIP meter? This device (with digital display) covers a frequency range of 1 MHz to 56 MHz, and can also be used as a frequency counter.

A2D Signal Processing
February 2008
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
August 2008
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...

Stand-Alone DDS Unit
November 2006
Direct Digital Synthesis (DDS) is one of the more prevalent methods used to generate a frequency agile signal today...

Analog: Mixed and Matched
October 2007
The device described in this article is both a 4:1 audio mixer and a 1:4 distribution system. Each of the input and output channels has its own volume control...

{/exp:channel:entries}