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Build Raspberry Pi Robots (For Beginners)

Posted February 7, 2018 by Chris

"If you are a beginner to Raspberry Pi and were looking for a simple hardware project, then look no further. This tutorial will show you to develop a python based robot which avoids obstacles and navigates freely. Obstacle avoiding robots are fairly common and easy to make. Here, you can use this project to add object avoidance functionality to your robot."

Wireless Thermostat/Temp Sensor (With XBee)

Posted February 4, 2018 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."

2×4 H-Bridge

Posted February 1, 2018 by Chris

"This motor-driver is an H-bridge circuit that was designed to drive a single DC motor at up to 30amps at 24vdc. It incorporates a simple design utilizing parallel mosfets to allow a higher amperage rating and requires 4 wires to control each bridge, 2 digital and 2 PWM capable."

Real vs. Fake Audiophile Op-Amps: OPA627

Posted January 29, 2018 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."

Building a Custom Integrated Circuit Package

Posted January 26, 2018 by Chris

"The aim of this pictorial guide is to build a complementary IC package to the Vishay IR receiver. It incorporates the same pitch and pin out except for the ‘Output(1)’ which will now become the new input."

Commodore Wi-Fi Modem

Posted January 23, 2018 by Chris

"The Commodore Wi-Fi Modem is built around two main components: The Arduino-compatible MicroView with built-in OLED screen, and the Roving Networks RN-XV or ‘Wifly’ wireless module. These give you significant flexibility to use it as a straight-forward wireless solution for your Commodore, with optional expandability for standalone use or as a platform for interfacing to the outside world. "

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."

Wireless SNES Controller

Posted August 25, 2017 by Chris

"The goal of this project was to build a wireless SNES controller that has the feel and action of the original hardware while also upgrading the interface from the SNES connector to a more modern USB connection."

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."

How to Build the CMoy Pocket Amplifier

Posted August 19, 2017 by Chris

"I think that the CMoy pocket amplifier is an ideal project to get started in audio DIY. This article is written for the beginner DIYer, though if you just want a guide to building this particular amp, you can skip to the parts or assembly sections.quot;