Using the MAX7219 in your Projects – Part 2

In the first part we explored the functions of this MAX7219 and how the SPI link is the key to making the device work for us.

In this part we’ll develop code to efficiently display numeric data using 7-segment and LED matrix displays.

Continue reading “Using the MAX7219 in your Projects – Part 2”
Advertisements

Using the MAX7219 in your Projects – Part 1

The MAX7219 is a common and inexpensive IC used for controlling up to eight 7-segment LED displays (or 64 individual LEDs).

Beginners are often intimidated by how to use this versatile component with a microcontroller, turning to libraries to help them solve the problem. In most simple cases, it is more efficient to run the IC directly. Here’s what you need to know to get the job done.

Continue reading “Using the MAX7219 in your Projects – Part 1”

Relay Timer with LED Display

Relay_Timer_Ortho_ViewAs part of a bigger project, I needed to make a timer that would activate a relay for a set time to switch power on/off to another device. Rather than buy one I decided to build my own from electronic bits and pieces that were on hand in my workshop, wrote some software for a ‘spare’ Arduino Pro Mini that was lying around and packaged it all up in a small box. It turned out to be quite functional, so I decided to document the build in case someone else finds this useful.

Continue reading “Relay Timer with LED Display”