[BikerGlen] wanted to spice up his zombie containment unit (see video below) so he designed and 3D printed some very cool looking bar graphs ... devices use a MAX6954 LED driver, so it needs ...

8×8 LED Matrix modules are now widely available, and fortunately they are easy to use with our favorite Arduino microcontroller. 8×8 LED Matrix module have many applications in real life, such as ...

For example, the LED bar graph uses 10 pins on the Arduino, which is great for an introductory example. However, a good point for that chapter's "Things To Try" section would have been to suggest ...

An LED bar graph comprising five LEDs, each representing 1V of input signal, represents the MSD (most-significant digit). Nine LEDs in dot mode, in which only one LED lights, represent the LSD ...