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  • Low-Cost Waveform Generators: Owon DGE1000 / DGE1030 AWG Review

    shabaz
    shabaz
    Table of Contents Introduction What is it? Motivation Unboxing Sine Wave Output 1.4 MHz Signal 10.7 MHz Signal 21.4 MHz Signal Internal Amplifier Noise Modulation Amplitude Modulation (AM) Frequency Modulation (FM) Low-Level Si...
    • 15 Jun 2025
  • Miniature Table Saw (Bench Circular Saw): Proxxon KS 230 Unboxing!

    shabaz
    shabaz
    I purchased a very small (less than A4 paper sized footprint!) table saw called Proxxon KS 230 , and it arrived today. It's not my first Proxxon tool:  Proxxon Rotary Tools Review: Micromot 50/EF, FBS 12/EF and NG 2/E   The KS...
    • 29 May 2025
  • Samtec's Severe Environment Testing Protocol Puts Interconnects Through Their Paces

    Catwell
    Catwell
    (Image credit: Samtec) Samtec recently announced the development of its Severe Environment Testing (SET) protocol, a qualification standard designed to test the reliability of Commercial Off-The-Shelf (COTS) interconnects employed in extreme environ...
    • 13 May 2025
  • Short Circuits and Continuity: Building an Easy Continuity Tester

    shabaz
    shabaz
    Table of Contents Introduction How Does it Work? Building It Setting Up and Using It Summary Introduction Since time immemorial, the continuity tester has always been just a dial setting on multimeters. That’s adequate most of the time, bu...
    • 26 Feb 2025
  • OpAmp as Schmitt-trigger

    Jan Cumps
    Jan Cumps
    A Schmitt-trigger is a circuit that turns a non-perfect digital signal into a clean one. It has 2 main functions: recreate a good fast ramp for signals that have lost their oomph (or never had clean fast edges).  provide a bit of hyste...
    • 25 Jan 2025
  • Brush and Large-Area Multi-Meter Probes for PCB Reverse-Engineering: A DIY Approach!

    shabaz
    shabaz
    This blog post contains some ideas for creating a probe to aid with reverse-engineering PCB layouts. You'd use this probe to temporarily replace one of the normal pointy probes on your digital multi-meter (DMM). Often, you may want to run a cont...
    • 5 Jan 2025
  • DIY Hydrogen Generator

    Prajyot70
    Prajyot70
    DIY Hydrogen Generator Table of contents Introduction Parts list Tools Preparations Let's build it ! Precautions Summary Introduction Hey everyone, you might know that our earth's surface is about 70% water but do you know what water is made up o...
    • 1 Dec 2024
  • AiXun CM30 Automatic Soldering Tip Cleaner: A Quick Review!

    shabaz
    shabaz
    I recently purchased an AiXun automatic soldering tip cleaner. It has a couple of spinning brushes inside, a bit like an automated car wash but for soldering tips. Here's a five-minute video demonstration and review: https://youtu.be/Fj9V0nAMmqo So,...
    • 28 Nov 2024
  • Fast Response Light Sensing with Photodiodes: Building a DIY Radiometer!

    shabaz
    shabaz
    Table of Contents Introduction Circuit Overview Building It Using It Summary Introduction Have you ever wanted to take a peek at what products that rely on light are actually doing? I have! A fast-responding light sensor can reveal the details. ...
    • 16 Oct 2024
  • Portable Oscilloscopes will Require Upgrades to Become Widely Adopted

    Catwell
    Catwell
    Some o-scope users state they don't use portable equipment enough to warrant having one, while others feel they're limited in features. (Image credit: Flickr) Handheld oscilloscopes are compact, portable versions of their desktop counterpart...
    • 4 Oct 2024
  • Organizing Small Tools: DIY Storage with Foam Cut-Outs!

    shabaz
    shabaz
    Table of Contents Introduction Using Steel Cutters Results Summary Introduction I’ve got a set of SMA adapters that I really don’t wish to lose. They are used with a Vector Network Analyzer (VNA). Some of the adapters came in a littl...
    • 24 Sep 2024
  • Knipex Explored: What makes for Great Electronics Pliers and Electronics Wire-Cutters?

    shabaz
    shabaz
    It feels a bit weird writing a blog post where I’m merely pointing out someone else’s YouTube link (and some screenshots from the Knipex website)! But I found this video pretty interesting; it explains why, instinctively, many ...
    • 9 Sep 2024
  • Knipex 11 82 130 Wire Stripping Shears Quick Review

    shabaz
    shabaz
    Introduction I was looking for a simple, fairly economical pair of wire strippers, and stumbled across these interesting scissor-like 11 82 130 wire strippers from Knipex. I thought I’d give them a try. They are intended for small wire dia...
    • 15 Aug 2024
  • Low-cost Vector Network Analyzer: NanoVNA-H4 Unboxing

    shabaz
    shabaz
    I recently needed a VNA, and went with one called NanoVNA-H4. This short blog merely contains an un-boxing. If you’re interested in finding out what VNAs are used for, check out the earlier blog post:  Vector Network Analyzer (VNA): A...
    • 22 Jun 2024
  • New Functionality for Older Equipment: Adding USB and SCPI Programmability

    New Functionality for Older Equipment: Adding USB and SCPI Programmability

    shabaz
    shabaz
    Table of Contents Introduction What’s the Problem being Solved? What’s Inside? Solution Overview Circuit Diagram Building It Software Testing It Summary Introduction This blog post shows how I went about adding programmability to an o...
    • 10 May 2024
  • JBC CD (CDS/CDB) Soldering Station Quick Review

    shabaz
    shabaz
    Table of Contents Introduction JBC CDS / CDB 'Compact' Soldering Station Quick Tryout Negatives Summary Introduction My old JBC soldering station was purchased second-hand about a decade ago, and it recently started playing up. I thought I had fi...
    • 27 Apr 2024
  • Electronics Parts/Storage: Labeling Parts!

    shabaz
    shabaz
    It’s sometimes handy having a label printer, but the costs for consumables can mount up. I recently needed to print a load of sticky labels for a school-related project, and I didn’t want to print them using a laser printer or handheld la...
    • 5 Apr 2024
  • Mini Tool Vice / Flat Clamp Quick Review

    shabaz
    shabaz
    Doug mentioned vices (  PCB Holders ) , and I picked up a small tool vice recently. It’s low-cost (£15) which is good, but very small, therefore it is a niche product. It won’t hold boards greater than about 49-50mm long, ...
    • 15 Mar 2024
  • Review and test a 0 - 1mA constant current source

    Review and test a 0 - 1mA constant current source

    Jan Cumps
    Jan Cumps
     shabaz designed an OpAmp based constant current source. It can deliver up to 1 mA. The current is controlled by a voltage. It's intended to be used with a DAC board for the Raspberry Pico. A constant current is a useful...
    • 9 Mar 2024
  • Vector Network Analyzers for the General Reader, Part 3: Using a Commercial Calibration Kit

    shabaz
    shabaz
    Table of Contents Introduction What’s in the Box? Interpreting and Using the Datasheet Performing the Calibration Testing the Calibration Summary Introduction In a couple of earlier blog posts ( Vector Network Analyzer (VNA): A Practic...
    • 5 Mar 2024
  • Using a MAX2870 Frequency Synthesizer / Signal Generator

    shabaz
    shabaz
    Table of Contents Introduction What Is It? Is it a Sine Wave? Using It Measurements Problems Recommended or Not? Summary Introduction I have a few simple tools for generating RF signals, and they all have benefits and disadvantages. I recently d...
    • 19 Feb 2024
  • A JBC Soldering Station Non-Repair and Teardown

    shabaz
    shabaz
    The soldering station in the photo below (JBC DI 3000) has provided me with many years of good service! I’ve regularly used it for perhaps a decade, and I purchased it fairly cheap in used state, so it’s had a long life. It has been a ple...
    • 16 Feb 2024
  • Vector Network Analyzers for the General Reader, Part 2: Inductance Measurement!

    shabaz
    shabaz
    Introduction In an earlier blog post, the use of a Vector Network Analyzer was introduced for the general reader. Continuing the simple no-maths approach, this short blog post walks one through how to use the VNA to perform an easy but exciting exerc...
    • 31 Jan 2024
  • Vector Network Analyzer (VNA): A Practical Getting-Started Guide for the General Reader

    Vector Network Analyzer (VNA): A Practical Getting-Started Guide for the General Reader

    shabaz
    shabaz
    Table of Contents Introduction Briefly, what is a VNA? And what is a Smith Chart? Solving a Practical Problem: Impedance Matching Open, Short, Load (OSL) Calibration Calibration Standards Building DIY OSL Calibration Standards Identifying the ...
    • 23 Jan 2024
  • How Many Chucks Would A Woodchuck Chuck?

    dougw
    dougw
    If a woodchuck could chuck chucks, how many chucks would a woodchuck chuck? The curious case of mini chucks galore.... https://youtu.be/nGavV6BRevI A little light tool blog - part of my new year's reorg activities ... All my mini chucks are now in a ...
    • 2 Jan 2024
>
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