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MCM Electronics Daily Deal and Bulk Bargain

Maglite 18650 Conversion

Posted August 13, 2017 by Chris

"The Maglite host body accepts two D-Cell batteries which are a bit shorter in length than an 18650 cell, unfortunately in my attempt to rid my home of non-rechargeable batteries I can not find a D-Cell battery for an image comparison. In order to accomplish this mod it would be necessary to accommodate the extra length from using two 18650 batteries."

Raspberry Pi Defcon Sign

Posted July 20, 2017 by Chris

"DEFCON or Defense Condition is an alert system utilized by the United States Military and indicates a level of alert ranging from DEFCON 5 (least severe) to DEFCON 1 (most severe). The goal of this project is to create a Defcon sign in the same manner that is driven by simple commands sent to a particular twitter handle using a Raspberry Pi as the controller."

Circular Saw Cad Project

Posted April 30, 2017 by Chris

"There are instances were images are not enough to convey and visualize a final product. SolidWorks has a great animations tool that lets you animate the things you create. The video below shows the circular saw being taken apart."

TI Calculator Overclocking

Posted March 31, 2017 by Chris

"….But otherwise, it’s odd because I get to dig through all my old boxes of gadgets and electronics projects. I did, and I found my first hardware hacking project ever, an overclocked TI82."

Real vs. Fake Audiophile Op-Amps: OPA627

Posted March 25, 2016 by Chris

"Walking around ebay I noticed insanely cheap OPA627’s. It’s rather old, popular and high-quality opamps, often used in audiophile gear. Manufacturer (Texas Instruments / Burr Brown) sells them 16-80$ each while on ebay it’s cost was 2.7$, shipping included. Obviously, something fishy was going on. I ordered one, and for comparison – older one in metal can package, apparently desoldered from some equipment. Let’s see if there is any difference."

eLearning Series: Getting started with CPLDs

Posted March 3, 2016 by Chris

"Here you will find links to all the articles that make up our CPLD for beginners guide. We’d love to hear your feedback about this guide. If we’ve got something wrong or if there’s anything specific you’d like us to cover, please don’t hesitate to get in touch."

Prankophone with Synthesizer

Posted February 11, 2016 by Chris

"Prankophone is a sound object being a hybrid of synthesizer, telephone and logic module. The main principle of the object’s functioning is as follows: depending on the current mode, the apparatus calls to random or pre-defined recipients and plays them algorithmic melodies created from their phone numbers. The speakers transmit both the synthesized sounds and the sound from answering person."

Comparing Different Types of Capacitors

Posted January 29, 2016 by Chris

"Capacitors are filtering devices with are used abundantly in electronic circuits and applications. There are many different types of capacitors. We will discuss some of them in this article."

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."

Gate Level Hardware Random Bit Generator

Posted January 9, 2016 by Chris

"These are some notes about building a hardware random bit generator. Johnny von Neumann once said that anybody who contemplates arithmetic methods for the generation of random numbers is in a state of sin. What he meant by that is this: if you try to generate random numbers using only software, the results will necessarily depend on the state of your machine at the outset of the process, and are therefore insecure. That is, somebody could conceivably reconstruct your allegedly random bitstream. "