News & Articles

PyroEDU
Get started learning to build your own electronics by following our FREE online courses below!
Learn More »

Categories

Sponsors

Build Like A Pyro!
Find many of the parts used on this site at our favorite online electronics shop
Take Me To The Gadgetory!


MCM Electronics Daily Deal and Bulk Bargain

Digital Barometric Altimeter

Posted August 22, 2017 by Chris

"I found on Ebay very nice, small 12v 23A battery holders for PCB mounting style and decided to fit the SMALL DIGITAL BAROMETRIC ALTIMETER just on the back of the holder. So basically this is the same schematic as the SMALL DIGITAL BAROMETRIC ALTIMETER, however I moved some of the connections to different MCU pins because of PCB space limitations."

Wally Robot

Posted August 7, 2017 by Chris

"Wally is a wall following robot that uses ultrasonic (ping) sensors to detect objects in its path, much like a bat uses SONAR to “see” things around it. Ultrasonic sensors are like high-frequency microphone/speakers."

Wireless Data Logging For Temperature And Humidity Sensing

Posted August 4, 2017 by Chris

"Monitoring and controlling relative humidity is important for humans health. Too low or too high humidity feels uncomfortable, but most importantly high moisture is a factor for growing mold in your home, which could be health threatening. I will not go into details on how to control humidity. Instead I’ll describe what motivated me to design and create my own temperature and humidity sensor which reports its readings every minute to a central Linux server."

Digital Temperature Sensing

Posted July 29, 2017 by Chris

"This circuit is simply a digital thermometer. I use a Microchip PIC Microcontroller to communicate to a Dallas DS18B20 Digital Temperature Sensor, interpret the data, and display the temperature on a multi 7 segment LED display."

Starting A Build of an Arduino Laser Tag System

Posted July 17, 2017 by Chris

"For the past few months, my friends and I have been planning to make our own laser tag system that we can play at home. The goal is to make a laser tag system that we can modify and program different game modes. Why are we doing his? We just want to play some laser tag, and learn a couple of things along the way."

Bark Opening Door System

Posted July 14, 2017 by Chris

"Sleep deprivation has been driving me mad recently. And it’s all down to a new member of the family, our new dog. She barks at night when she’s left out. She barks early in the morning when she’s left in. So once I recognized the patterns of her barking, I realized that all I needed was something that would let her out when she needed to go for a pee, usually around 6:30 in the morning."

Temperature And Humidity Sensing

Posted July 8, 2017 by Chris

"The temperature and relative humidity of indoor air is an important parameter that can influence indoor microbial survival, abundance, and community structure. Temperature and relative humidity can also be used to infer other information about indoor environments, such as whether or not it is being heated or cooled."

Rain Detector Sensor

Posted June 26, 2017 by Chris

"This rain detector will give you a heads-up the instant it starts to rain, hopefully giving you time to close windows and bring in possessions. The battery-powered circuit draws virtually no current when the sensor is dry and the current consumption is low when the buzzer is activated so a couple of AA cells will last a long time."

Seismic Sensor

Posted June 11, 2017 by Chris

"My original “Deer Repellent/ Seismic Sensor” recommended using a speaker with a weight glued to the cone as a vibration sensor (see bottom of page) but it recently occurred to me that the speaker could supply the mass itself. By gluing a standoff to the center of the cone, an inexpensive 2″, 8 ohm speaker becomes a vibration sensor with a natural resonance below 100Hz which is quite good."

Heatsink Tester

Posted April 3, 2017 by Chris

"It’s quite a common problem when building electronics that some components need cooling which is usually done through some sort of heatsink and optional fans. Choosing the right cooling solution can be a difficult task because the real life behavior of the system is hard to predict or model. In my case I have faced the simple question quite a few times: how much heat can a cooling system dissipate?"