Archives

I’ve shown you how to use shift registers to drive an LED grid, including how to draw pictures on the screen from memory. Now we’re going to use those tools to make a game similar to [...]

In previous tutorials I showed how to use seven segment displays, how to use shift registers and how to daisy chain shift registers, and talked a bit about persistence of vision.  In this [...]

The first time using a new microcontroller is what I call funstrating, especially if you don’t have clear instructions.  We’ve done the hard work of figuring out the NodeMCU drivers [...]

Shared anodes and cathodes are a common technique used to control lots of LEDs with a small number of microcontroller pins.  I’m going to talk about why share anodes and/or cathodes.  Then [...]

In the previous post we learned how to use a 74hc595n shift register.  I mentioned briefly that shift registers could be daisy chained – connected end to end – to increase the number [...]

Using a shift register is a super easy way to expand the number of electronic components connected to an microcontroller like an Arudino or a NodeMCU.  We’re going to cover what is a shift [...]

Marginally Clever has made a lot of different robots, including the Arm3 palletizing robot. Robot arms hold great fascination here. We’d love to build a really great low cost robot arm. One [...]

Watch the tutorial video below to learn how to set up everything you need to run your Makelangelo 2.5 robot, starting the moment you get the box in the mail until you are installed on a board [...]

This tutorial video shows you how to set up everything you need to run your Makelangelo 3.2 robot. Watch for guidance from receiving your robot to fully installed and ready to draw. Install It [...]

Drawing open street maps on the Makelangelo looks fantastic and is painless once you have the Open Street Map OSM file into DXF format. Here are the steps I use to download Open Street Map data [...]