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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."

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."

Chip-8 Emulator

Posted February 5, 2016 by Chris

"I’m taking a microprocessor applications class this semester and the final project was to spend the last three weeks making whatever I wanted. I ended up making a Chip-8 emulator for the PIC32MX270F256B microcontroller. Here’s the final circuit."

Designing and Building the Macro Watch

Posted February 3, 2016 by Chris

"Three weeks before the Houston Maker Faire Chris came to me asking if we could whip up a low cost giveaway for the faire. I wanted to giveaway something more than a blinky LED badge since that is the typical electronic swag at Maker Faire. It had to be something that the person would wear and would want to show off to other Makers to spread the word about MacroFab. Blinking LEDs are always necessary though."

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"

Mini-PCIe microcontroller and make your board too

Posted January 21, 2016 by Chris

"I have just recently finished this board, and been able to test it briefly with Springboard and also with the VAB-820. The picture just below shows the shining blue LED, that is tied to D13 – the 13th digital pin, as most Arduinos do."

My Business Card v2 (PCB Card)

Posted January 11, 2016 by Chris

"At the end of this month, I’ll be leaving my current job. I therefore thought it’d be a nice occasion to build a new business card for my future interviews. You may remember the first version of my business card made more than one and a half years ago (time flies!). It was basically made of two PCBs soldered together."