Blog

  • Building a USB-C USB-UART Board

    shabaz
    Introduction USB-UART devices provide an interface between a host computer and a peripheral device, connecting between the USB port and a serial connection called a serial UART. Nearly all microcontrollers have a serial UART, and sometimes it can be ...

  • Building cheap case for USB audio card called SkySong

    jgrzybowski
    Cheap case for USB audio card called SkySong Goal+ cheap and useful case for SkySong USB audio card;+ appearance of device suitable to wooden and black case of headphone amp;+ case must increase total weight of device due to lightweight USB card, whi...

  • Building cheap headphone amplifier integrated with DAC

    jgrzybowski
    Cheap headphone amplifier integrated with DAC Goal+ good quality headphone amplifeier;+ good quality DAC;+ integrated device for cost reduction (one power supplly and one housing);+ headphone amp. and DAC board must have common voltage of power suppl...

  • Building compact size cubic micro-atx PC case from plexi and 3D printed parts

    jgrzybowski
    Building compact size cubic micro-atx PC case from plexi and 3D printed parts Goal+ cheap PSs dedicated for special purposes (like VHS grabbing and video compressing);+ based on standard size components (for excellect ratio efficiency / cost);+ as sm...

  • KiCad 6 Unofficial Quick Start Training / Guide Video

    shabaz
    Table of Contents Introduction Video Contents PCB Editor Configuration Screenshots File->Board Setup->Design Rules->Constraints File->Board Setup->Design Rules->Pre-defined Sizes File->Plot File->Plot->Generate Drill Fi...
  • Building a Mini 5V Supply in a DB-25 Shell

    Building a Mini 5V Supply in a DB-25 Shell

    shabaz
    Table of Contents Introduction Circuit Construction Output Noise Summary Introduction This is quite a niche blog post, but may be relevant for anyone who needs a simple, quick, low-noise power supply! This project is PCB-less, it can be very qu...

  • Building a Simple Radio - Part 2 - Final Assembly

    shabaz
    Way back in June, I was Building a Simple Radio Receiver that was intended to be solderable by kids, low-cost, and almost guaranteed to work the first time, owing to its simplicity, requiring no adjustments or trimming.Unfortunately, other work got i...

  • Copper Clad Prototyping Tools

    shabaz
    Following on from a Project14 discussion DIY 100kHz VCO - Build & Test  on copper-clad board techniques for prototyping, I was curious to know how I could improve my current method of using a craft knife to cut channels for creating isolated...

  • First Steps with Digital Signal Processing (DSP) Chips

    shabaz
    Introduction What is DSP? Installing the Software USBI Board ( EVAL-ADUSB2EBZEVAL-ADUSB2EBZ ) Turning an LED on and off A Simple Audio Effect Summary  IntroductionThis blog post relates to a simple digital signal processing setup, ...

  • Building a Simple Radio Receiver

    shabaz
    Introduction Radio Circuit Amplifier Circuit Power Entry Circuit Board Wiring Diagram Soldering Enclosure Components and Parts List Potentiometers Speaker Parts List Summary  IntroductionThe aim of this project was to d...

  • Working with Surface Mount Devices (SMD) and Breakout Boards

    shabaz
    Introduction SMD Proto Board Features Ordering Them Other Surface Mount Ideas Tools Components Summary   IntroductionGrowing up, using perforated board (Perf-Board) and Stripboard were the ways things got prototyped. With surf...

  • Building a Voltage-Controlled Oscillator (VCO)

    shabaz
    Introduction What it is? Oscillator Design Output Spectrum Stability Output Filter Circuit Diagram Using a Printed Circuit Board (PCB) Components Summary   Introduction This blog post covers the construction of a voltage-controlled oscilla...

  • Building a Fast Edge Square Wave Generator

    shabaz
    Introduction How does it work? Building It Parts Trying It Out Summary  IntroductionSometimes it’s useful having the ability to generate signals with sharp edges! It can be handy for time-domain reflectometer (TDR) experiments or for...

  • SEGGER's J-Link OB and BBC HiFive Inventor educational kit

    jomoenginer
    I found this quite interesting. The BBC Doctor Who HiFive Inventor Coding Kit is a very cool implementation of the RISC-V architecture (150-MHz SiFive FE310 RISC-V) making it accessible for youngins' which includes narration of tutorials by Jodi...

  • Mini Experimenter: Connected Science Experiments with Casio and IoT

    shabaz
    Introduction What else is out there? How does it all fit together? Thunderboard Sense 2 ESP32 Boards/Modules What Protocols are used? Low Layer Protocol High Layer Procedures Custom Procedures Coding the Protocols Debugging the C...

  • Low Battery Warning Indicator

    shabaz
    IntroductionI like building battery-powered circuits, but always in the back of my mind is the thought that I really ought to provide a ‘low-battery’ indication! Since it isn’t usually a core feature of the project, it often gets forgotten. This ultr...

  • ARMP - (Nearly) Complete Schematics

    michaelkellett
    I had hoped to to have completed the basic design by now but I've spent a lot of today thinking aboutpower supplies, but not getting quite far enough to commit to paper (or CAD).The idea was always to have a a separate power conversion board, so ...

  • ARMP Processor and Display

    michaelkellett
    15/08/2020This is still very much work in progress. I've confirmed my primary choice of display, the Riverdi RVT43ALBFWN00, available from Mouser and RS.It has an SPI interface over a 20 way FPC and uses a Bridgetek controller chip. This is ...

  • ARMP ADC, DAC and FPGA

    michaelkellett
    Overview Once again there are few (if any) component vlaues on the schematic, these will appear in the BOM later on.Treat the pin numbering on the FPFA with caution, I shall swap pins as appropriate when I layout the board.  The Detail...

  • ARMP Input Amplifier

    michaelkellett
    This is my first stab at the input amplifier for the Archaeology Resistance Meter Project.It's tagged as armp OverviewThe schematic has (almost) no component values but I shall talk about them in the text.All two terminal components are in 0...

  • Meter Dial Creator Toolkit

    shabaz
    Introduction Overview Using the Code Settings Section Functions Section Main Code Section Putting it all Together Summary   Introduction For a recent environment sensor project I wanted to make use of an analog moving-coil meter. They ar...

  • Engineers, Makers, and Citizen Scientist Team Up On Facebook To Create Open Source Medical Supplies To Fight Global Pandemics

    CharlesGantt
    I've been covering the engineering and maker communities for over a decade now, and it never ceases to amaze me when these communities come together to solve complex issues. Take for example the E-Nable Project. Engineers, Makers, and Citizen Scienti...

  • Microphone Amplifier for Micro-controllers

    shabaz
    The blog post here is just a place to put files and diagrams related to an electret microphone element amplifier circuit that is intended for basic sound or speech applications. The circuit is based on requirements from    and analysis ...

  • Building a Dual Thermistor Air Temperature Sensor

    shabaz
    Introduction How does it work? Building a Temperature Sensor Summary  IntroductionThis blog post describes a really simple (near-trivial) project – wiring up a thermistor! Thermistors are great, but have a limited operational temper...

  • Free Chemistry, Heating and LoRa stuff [UK]

    shabaz
    Hi, I've got some items unrequired, if you're in the UK and wish to have it, please let me know if you want "chemistry" or "LoRa" or "Heating" stuff and I'll post it for free.All of this stuff is new and unused, and I hate to just throw it away since...