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RaspberryPi Alarm Clock

“This is an alarm clock based on a RaspberryPi. Any RaspberryPi will work. I used a model B1 version 2 because it has the mounting holes and speed does not matter. I have a task that needs to be performed …

Burglar Alarm System

“I had a “brand name” burglar alarm system installed in this house many years ago, but when I switched my phone system to use VOIP over my internet, the phone connection to the alarm system was disconnected and it was …

Linear Bench Power Supply

“This project is a simple linear bench power supply with adjustable voltage and current. It is meant to be a learning experience, putting ideas of circuit design, feedback, stability into practice building a complete practical power supply. I have intentionally …

Arduino Morse Decoder

“This device reads hand keyed Morse code from a signal key (or an ordinary switch) and translates it to plain text and show the Morse code you’re keying on an LCD. I use it to train my own Morse …

Arduino MP3 Alarm Clock

“A while ago, I stumbled over a component called DFPlayer. It’s a tiny component that allows to play mp3 from an micro SD card (for less that 10!).”

Arduino Mouse Trap

“For this Challenge, I created an Arduino controlled Mouse Trap to capture any unwanted pests that may wander into your space. The project is complete but I have one more addition that I will try to make. More about this …

Multiple Fermentation Chamber Control with BrewPi

“In this Instructable I will try to explain how I built a BrewPi based fermentation chamber control system for multiple chamber control. If you are a brewer like me, you don’t usually have just one beer going at a …

2-line interface for graphic LCD

“LCD is a preferred medium of interface when dealing with embedded systems. It can display both numbers and characters. Further, the graphical LCD (GLCD) is even better, as it can display texts, plot curves, display pictures. In the present context …

Reading the BMP180 Pressure sensor with an Attiny85 and add a DHT11 too

“I love the Attiny 85 series and like to explore all the things you can do with it. As it doesnt have too many pins, using I2C hardware on it is a good idea. I2C on the attiny can be …

Building a Capacitive Liquid Sensor

“A capacitive liquid sponsor relies on the fact the the capacitance or charge between 2 metal plates will change (in this case increase) depending on what material is between them. This allows us to create a level sensor that is …