Tag: LED
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This, Jen, is the Internet
This isn’t much more than an “I made a thing” post. You have been warned. I’m sure many of you are familiar with the iconic British sitcom “The IT Crowd”. There are so many memorable quotes and gags, but my favourite has always been “The Internet” from the series 3 episode “The Speech”. I liked…
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The Astable Multivibrator
One of the first circuits I ever build on a breadboard was the ubiquitous astable multivibrator. Two NPN transistors, two capacitors, two LEDs and four resistors. It’s a circuit that just about every electronics engineering student and hobbyist builds at some point in their life. Sure, a 555 in astable mode uses fewer components, and…
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Arduino Tip: 7 segment LED display with 4094 shift register
This is my first Arduino example sketch – hopefully the first of many. This sketch allows you to control a 7 segment LED display using an Arduino and a 4094 shift register. Only 4 data pins are used on the Arduino, rather than 8 if you were to control the 7 segment display directly. For…