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MCM Electronics Daily Deal and Bulk Bargain

Triple 8 H-Bridge

Posted August 28, 2017 by Chris

"This is a motor driver board that can drive 2 DC motors in Forward or Reverse with full speed control. It can handle at least 25 amps per channel continuously at 24vdc. I designed it using a basic H-bridge with 4 switches, 1 switch going to positive (+) and 1 switch going to negative (-) for each motor terminal."

Open Source PLC

Posted August 1, 2017 by Chris

"The PLC is a general-purpose controller with a wide variety of applications. It is useful to the engineer, technician, student and hobbyist. All the source files for the small brick OSPLC are provided, including schematic diagrams so that you can build this project yourself or modify it."

Raspberry Pi Serial Breakout Board

Posted July 26, 2017 by Chris

"A simple single-sided board that connects a RS-232 serial port to the Raspberry PI and breaks out some of the PI’s pins for experimentation. The interface board was designed to be simple and used for initial experimentation. It can be built on a single-sided PCB using home-made PCB fabrication methods."

FPGA Driven Nixie Tube Speedometer

Posted July 11, 2017 by Chris

".Anyway, Luke Miller over at FPGA Expert recently bought a vintage pickup truck and wanted to trick it out a bit with some custom electronics. He decided to use GPS to measure speed rather than hooking the speedometer directly up to the truck’s sensors, this way the project could be replicated on any make/ model of vehicle. Luke is using a Pmod GPS receiver which he is then running through his Basys2 Spartan-3E FPGA board to make this thing work.quot;

Raspberrypotter

Posted May 6, 2017 by Chris

"Raspberry Potter is an open source project that lets you control things around your room or your house with a magic wand. Imagine if you had a magic wand to control everyday things. Once you make a Raspberry Potter, you’ll be able to do just that – by drawing simple gestures in the air."

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."

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."

Using Internet Of Things To Turn On A Computer

Posted March 23, 2016 by Chris

"I have a computer in my apartment which I mostly use for playing video games, but sometimes I like to access it remotely over the internet to do server tasks for me. The problem though is that gaming desktops use a lot of electricity when they’re running. So running the computer 24/7 would be too wasteful. Instead, I want to be able to turn on my computer from anywhere on the internet; whenever I desire to use it remotely."

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."