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MCM Electronics Daily Deal and Bulk Bargain

PWM Dimmer for LED Lighting

Posted May 4, 2016 by Chris

"I have recently moved to a new apartment and was looking for a PWM dimmer to control some 12V LED strips. I thought that should be easy enough nowadays but it proved more difficult than I thought. All I found either didn’t meet my requirements, were uggly or expensive. So I decided to build my own, tailor-made to my needs."

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."

Home-made GPS and compass

Posted April 18, 2016 by Chris

"This is a project I started about a week or so ago and have been working on when I find time after work. It’s a GPS and compass that temporarily uses an Arduino Nano micro-controller, Nokia 3310 screen, EM-406A SiRF III GPS receiver, and a simple (non-tilt compensated) magnetometer for compass heading."

Raspberry Pi GPIO driving Servo

Posted March 9, 2016 by Chris

"I have experimented with GPIO on the Raspberry Pi, just turning an LED on and off here. But since then Ben Croston has improved the RPi GPIO Python library to do most of the work in C and I can confirm that it is a lot faster. Driving servo motors requires precise timing, so I decided to see how the Pi would perform this task."

Dual Motor L298 H-Bridge Motor Control

Posted February 9, 2016 by Chris

"Dual Motor L298 H-Bridge Control project can control two DC motors connected to it. The circuit has been designed around popular dual H-Bridge L298 from ST. This circuit has current sense resistors for both H-bridges to provide voltage which enables this board to use in stepper motor applications."

Built for Humanity: Farmbot Genesis

Posted February 7, 2016 by Chris

"All of our software, hardware plans, and documentation is free for you to download and improve upon. Our Mission: Grow a community that produces free and open-source hardware plans, software, data, and documentation enabling everyone to build and operate a farming machine. Our Vision: Create an open and accessible technology aiding everyone to grow food and to grow food for everyone."

Motor Controlled via Eye Tracker

Posted February 1, 2016 by Chris

"This section explains the details of the hardware and software used to create the eye-tracker controlled robot arm. Hardware: USB LEGO Cam, Simulated Eye, and LEGO Mindstorms NXT Robot Hand"

Office Prank DIY Zombie Selfie

Posted January 27, 2016 by Chris

"To spice up the office around Halloween I decided to make a molded zombie arm that takes pictures of zombie lunch and posted them to the Twitter account @ZombieSelfie."

Build a Wireless Water Meter for Your Home

Posted January 17, 2016 by Chris

"My system doesn’t require plumbing alterations, and it transmits the information via my home wireless network, so I can view water use on a connected device anywhere in the house. Now when my teenage kids take profligate showers, I can berate them with quantitative measurements!"

PWM Halogen Lamp Dimmer

Posted January 15, 2016 by Chris

"High Current PWM Halogen Dimmer controller project is designed around SG3525 IC and High current MOSFET. Project can handle lamp up to 5 Amps (10Amps Possible with big heat sink) and supply 12-24V DC .Ideal for Halogen Dichroic Lamp or Halogen Lamp."