My Commentary and Technical help

This change started as an accident.  Somehow I broke one of the variable resistors that controls the servos in the arm.  So after a while I ...

There was not enough pins available on my Arduino UNO to interface a LCD.  I was using 15 pins to control the servos.  So I added a PCA9685 ...

 I am working on different options for the head or face of my 15 DOF robot.  Today I got a MAX7219 8x8 LED array working with it.  Over the ...

  I have finally been able to run this robot.  I started the project about a year ago.  There was one bad servo that needed replacement.  Th...

I rewired another of my signs to have all of the LED's wired in series.  They will work with an ESP8266 or newer processor wired that wa...

This summer I had purchased a LED sign.  On a closer observation I discovered that I cannot read the model number.  The sign contains two LE...

I recently had a situation where someone had purchased some RGBW LED strips, but he had no controller and needed the light strips to work wi...

 My daughter said that one of her headlight was rather dim.  When I opened the hood I immediatly smelled the burnt electrical smell.  I look...

My car would not start this last Saturday.  The dash would light up but it would not even try to start. The next time I tried it the battery...

 I have been working on a Arduino D1 Mini Powered Watch.  The hope is to add features like the MAX30102 for heartbeat monitoring, and an acc...

  In this chapter we will first introduce the 96 x 64 Full Color OLED display.   Once again I was able to get the pins to line up so that a ...

 I am building another humanoid robot, this time with what are called "robot", double ended, servos.  This picture is what he look...

 I have been having Problems with 5 volt 15 amp AC Adapters.  Three of them have died in the last 2 or 3 months.  I opened them up and the c...