Content for NE555

Reloj - 7400 Series Digital Clock

“This project was inspired by my dad’s university digital systems project from the late 1970’s. I found the writeup and schematic and decided to try and re-create it. You can see the results of the breadboard reproduction and …

An ESP8266-based Temperature, Humidity and Line Voltage monitor

“As anyone who reads this blog probably knows, I have a bit to do with the operation and maintenance of the Northern Utah WebSDR - a remote receiver system that allows anyone with Internet access and a web browser to listen …

cVert - A truly random MIDI controller

“cVert is the result of an idea I’ve been kicking around for years, and took a few months of work to bring to fruition. The idea was to use a Geiger counter as a true random number generator to …

Columns - a Retro Handheld Game for Arduino

“Based on the 1989 Sega(R) arcade and console game Columns which was inspired by Tetris, this is a more modern take on a plausible handheld portable version as would have been envisioned in the late 1980’s. My version …

Ultrasonic Sound Gun (Parametric Speaker)

“I built a gun that shoots out a narrow beam of ultrasonic audio. The sound can only be heard by people inside the narrow beam. For this project I built a gun that shoots out a narrow beam of ultrasonic …

Electronic Loud Horn Using 555 Timer

“The LM555 generates an electronic horn signal which is amplified by an LM386. The tone and volume of the horn can be easily varied. The horn can be used in a car, scooter, cycle, and motorbike. Electronic Components: 1x IC …

LED Distance Indicator Dog Harness

“I usually take my dog Rusio for a walk when the sun goes down so he can play without getting too hot. The problem is that when he’s off the leash sometimes he gets too excited and runs further …

Battle of the Bands: 555 Timer Edition

“Today, we are going to be using 555 timers to create some musical instruments! We will be building a theremin, organ, and an Atari Punk Console. I used this activity in my classroom to celebrate graduating from discrete components to …

A digital quartz clock from scratch

“After 20+ years of programming, I wanted to get some understanding of the electronics that make my career possible. I had built the basic individual logic gates with transistors on a breadboard, but to build anything meaningful I needed loads …

Moog Style Synth

“First and foremost, I have to give a massive shout out to Pete McBennett who designed this awesome circuit. When I came across it on YouTube I couldn’t believe the sound that he managed to get out of a …