Demultiplexer with Arduino

After my (somewhat failed) Charlieplexing experiment, I ordered a 3-8 line decoder (demultiplexer) to attempt an 8 bit LED counter in a much easier way. At some point I am wanting to created an LED matrix board, and this will require at least 32 LEDs. Unfortunately, the demultiplexer I ordered is an inverting demultiplexer. This… Continue reading Demultiplexer with Arduino


For fun, I was going to create an 8 bit binary counter with my Arduino Uno. An obvious, simple way to do something like this would be 1-1 wires all grounded to the Arduino. That’s all fine and nice, but pretty soon you have a mess of wires. Also, its not a very challenging way… Continue reading Charlieplexing


Using an IR receiver diode and Arduino Nano I made a very simple program to read inputs from an old Toshiba DVD remote (which I decoded using the same receiver). Both the receiver and the remote operate on a 38kHz carrier frequency. This is important. Its very basic–If I see code 0xA25D807F, I turn on… Continue reading Arduino/IR


Back in the day I worked at Raytheon. Most of the people I worked with were electrical engineers with many years of experience–And many of them took great pride in their ability to solder. There were a few debates over who was better at the craft. Until very recently, short of making blobs of solder… Continue reading Soldering

Down On The Corner – Arduino

#include <Wire.h> #include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x3F,16,2); // LEDs const int pin1 = 13;       const int pin2 = 12; const int pin3 = 11; const int pin4 = 10; const int pin5 = 9; const int soundSensor = A0; // the piezo is connected to analog pin 0 int sensorReading = 0;       void setup()… Continue reading Down On The Corner – Arduino

First Arduino Project – Distance Control Shutter Release

I picked up an Arduino last weekend after my friend Eric introduced me to it (this is the same friend who got me hooked on Mac). I couldn’t wait to order it on Amazon, and just decided to spend a little more on it at Radio Shack to have it in hand. Exactly one week… Continue reading First Arduino Project – Distance Control Shutter Release