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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."

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."

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."

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."

Building A Traffic Light

Posted May 12, 2017 by Chris

"The traffic-light project is something we did at work (Isotope11) to monitor our software projects. We are a software development firm and we handle some large projects that have extensive test code written to make sure newly added features or changes to existing features can easily be tested by running the test code against the changes."

Keyglove Tech In

Posted April 24, 2016 by Chris

"The Keyglove is an innovative new way to interact with your technology. A wearable, wireless, open-source input device, the Keyglove provides unprecedented flexibility and convenience for gaming, design, art, music, data entry, device control, 3D object manipulation, and even inexpensive telepresence."

Wireless Thermostat/Temp Sensor (With XBee)

Posted April 20, 2016 by Chris

"This post will be divided down into two main sections: hardware and software. I will try to explain with detail while keeping it short, and cover some of the key elements and choices involved in making this project."

Little Helper: Logic Analyzer And More!

Posted March 13, 2016 by Chris

"Working in my lab with electronics I came across different little challenges once in a while, and noticed that I am missing tools to handle them efficiently. Just a quick list, I am sure you could add various items to the list…Of course these aren’t any issues that you could not handle with the tools you have. But each of these take time….so, announcing the Little Helper!"

Intrinsic Optical Signal Imaging Chamber IOSIC

Posted March 5, 2016 by Chris

"Intrinsic optical signal (IOS) imaging is a functional imaging technique that has revolutionized our understanding of cortical functional organization and plasticity since it was first implemented, around 30 years ago. Even if IOS imaging lacks the ability to directly measure electrical neuronal function and track data at a fine temporal scale, it has some advantages on electrophysiological techniques, such as the capability to visualize functional architectures via the simultaneous sampling of a large cortical region with high spatial resolution."