My Commentary and Technical help

My book "Arduino Robotics Projects" ended with a walking dinosaur.  I might eventually write a sequel to that book with a spider a...

Last night I was testing a TDA8703 analog to digital converter and after trying 36 MHz I tried 50 MHz on a whim and it worked.  I also tried...

I have been testing various fast analog to digital converters with the Arduino.  There are two  objectives. I want to see if I can improve t...

Years ago I talked about the second civil war.  Here is one of several posts:   http://bobdavis321.blogspot.com/2011/03/more-on-upcoming-sec...

One of my favorite things to do is to go to Hamfests.  Here are some pictures from this years Chaffee NY Hamfest. This is my table.  Does ...

I am finishing up the biggest project for my latest book on LED cubes.  Here are a couple of video's about the 8x8x8 color LED cube. I...

I was at a yard sale and I asked them about a 32 inch TV.  They said it was free because the screen did not light up.  It turned out to be t...

I completed the third application for my 8x8x8 LED cube.  First it was to use it with an Arduino, then with a Raspberry Pi and then this kit...

I have been working on a book of LED Cube Projects.  It might end up being two books one for the Arduino and one for the Raspberry Pi.  So f...

I recently purchased another pile of used projectors to repair and then send to Africa.  However three of them need more than just cleaning....

Once again this year I attended the mini Hamfest.  It is just for a couple hours in the evening but you get to talk to a lot of interesting ...

I spent a weekend fixing seven Dell 2300MP Projectors.  In every projector the power supply was not working.  I replaced the same capacitor ...