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  • Easy Grounding for USB Soldering Irons

    shabaz
    shabaz
    Table of Contents Introduction What’s the Problem? What’s the Solution? Building It Using It Useful Items Introduction USB powered soldering irons are handy tools, however, they are fundamentally different to normal mains-powered sold...
    • 5 Jan 2023
  • USB-C Soldering Iron Quick Review: Sequre S60

    shabaz
    shabaz
    Table of Contents Introduction Motivation What Soldering Iron? What’s Inside the Kit? Using It Grounding Quick Teardown Things that Could be Improved Things that were Excellent Summary Introduction I recently purchased a couple of USB-C s...
    • 3 Jan 2023
  • Building a Digital Microscope with Ghost Overlay Mode

    shabaz
    shabaz
    Table of Contents Introduction New Features Cross-Hairs Quick Record Overlay/Optical Alignment What was wrong with the old project? Keep what Works Use Standard Photography Mounts Improved Lighting Build Software Summary Introduction A very l...
    • 31 Dec 2022
  • Piezo disk as Vibration Sensor: input buffer and filter

    Piezo disk as Vibration Sensor: input buffer and filter

    Jan Cumps
    Jan Cumps
    For the Sound and Vibration Measurement Hat for Raspberry Pi road test, I reviewed industrial Piezo Acceleration Sensor PCB Piezotronics 603C01. It's intended for unfriendly environments, and has built-in electronics. For less...
    • 17 Dec 2022
  • Secrets of Ground Loops explained!

    Catwell
    Catwell
    Ground loops are a mystery to many people. Even seasoned electronic engineers can struggle to understand the concept of ground loops. This is generally because either the engineer is focused on designing the power distribution system or the equipmen...
    • 5 Dec 2022
  • Wiha Surface Mount Tweezers – Quick Review!

    shabaz
    shabaz
    When soldering surface-mount parts, half the battle is obtaining a reliable grip on the components when manipulating them into position. Another battle is seeing them ! I lost a really nice pair of VOMM PSF-SA-ESD tweezers, so I was keen to repl...
    • 15 Nov 2022
  • Fun with BLE Apps and the MP730026 Digital Multimeter

    shabaz
    shabaz
    I had some time to experiment with my new MP730026 multimeter  and was intrigued to know if I could get the BLE capability functioning. I wanted to be able to access the meter from the laptop, and the mobile phone! The MP730026 was interest...
    • 14 Nov 2022
  • mini project: PICO-PI programmable Lab Switch - 5: use the USB Port as COM

    Jan Cumps
    Jan Cumps
    In this series, I design a programmable lab switch based on RP2040, that can turn a set of signals or supplies on or off. Over USB. SCPI compatible.In this post: enable the USB as communication channel. Differences with UART approa...
    • 22 Oct 2022
  • mini project: PICO-PI programmable Lab Switch - 4: Your Homework - extra pins

    Jan Cumps
    Jan Cumps
    In this series, I design a programmable lab switch based on RP2040, that can turn a set of signals or supplies on or off. Over USB. SCPI compatible.In the previous post I gave you homework, but you didn't do it  . So I'll pick up t...
    • 20 Oct 2022
  • mini project: PICO-PI programmable Lab Switch - 3: DIGI:OUTP command

    Jan Cumps
    Jan Cumps
    In this series, I design a programmable lab switch based on RP2040, that can turn a set of signals or supplies on or off. Over USB. SCPI compatible.In this post: add the SCPI command to switch an output (the LED in this demo): DIGI...
    • 18 Oct 2022
  • mini project: PICO-PI programmable Lab Switch - 2: add SCPI parser

    Jan Cumps
    Jan Cumps
    In this series, I design a programmable lab switch based on RP2040, that can turn a set of signals or supplies on or off. Over USB. SCPI compatible.In this post: integrate the SCPI parser, get default conversation going. Integrate ...
    • 17 Oct 2022
  • mini project: PICO-PI programmable Lab Switch - 1b: retrieve UART characters in a FreeRTOS task, with Interrupt support

    Jan Cumps
    Jan Cumps
    In this series, I design a programmable lab switch based on RP2040, that can turn a set of signals or supplies on or off. Over USB. SCPI compatible.In this post: convert the pico-pi uart_advanced example (UART with interrupts)...
    • 17 Oct 2022
  • mini project: PICO-PI programmable Lab Switch - 1a: understand UART and Interrupts

    Jan Cumps
    Jan Cumps
    In this series, I design a programmable lab switch based on RP2040, that can turn a set of signals or supplies on or off. Over USB. SCPI compatible.In this post: understand RP2040 UART with interrupts. image source: a similar exercise o...
    • 16 Oct 2022
  • Rohde & Schwarz Scopetoberfest in Hillsboro, OR

    ralphjy
    ralphjy
    Just attended the Rohde & Schwarz Scopetoberfest at their local office here in Hillsboro. German beers and food (sausages and sauerkraut and cookies) were provided. There was a short Oscilloscope Fundamentals presentation and they unveiled their ...
    • 14 Oct 2022
  • DX10 Battery Contact Spot Welder Teardown

    shabaz
    shabaz
    Introduction The DX10 is a low-cost battery-powered spot-welder. It comes with a couple of electrodes, a length of metal strip (for use as battery tabs), a small piece of abrasive paper (for reshaping the electrodes as they wear out, or for removing ...
    • 21 Sep 2022
  • Understanding Guanella Components (Baluns)

    shabaz
    shabaz
    Table of Contents Introduction Getting Started: Common-Mode, Differential-Mode Currents and Chokes Transmission Lines Putting It Together: The ‘Coil System’ Multiple Coil Systems Real-World Baluns High-Level Calculations Parallel and T...
    • 9 Sep 2022
  • OpAmp basics: balanced to unbalanced signal with difference amplifier

    Jan Cumps
    Jan Cumps
    A little OpAmp circuit to turn a balanced signal into an unbalanced one. This is the circuit that jc2048 shows in my previous article.It's a very simple circuit, discussed in many books (Analog Signal Processing by Pallas-Areny and...
    • 5 Sep 2022
  • OpAmp basics: unbalanced to balanced signal with dual OpAmp

    OpAmp basics: unbalanced to balanced signal with dual OpAmp

    Jan Cumps
    Jan Cumps
    A little OpAmp circuit to turn an unbalanced signal into a balanced one.An unbalanced signal is the typical signal coming out of a signal generator, consumer audio equipment, headphone jacks.A balanced signal uses two separate wire...
    • 28 Aug 2022
  • The Danger of Thermocouples from Dodgy Sources

    shabaz
    shabaz
    Due to the current shortages of parts, and the escalating costs, I decided to skimp a little and buy a bunch of thermocouples from AliExpress, because I needed quite a few for testing a couple of projects. Unfortunately, they will all need to be car...
    • 18 Aug 2022
  • Organize your workbench contest - addendum

    wolfgangfriedrich
    wolfgangfriedrich
    Along time ago on a workbench far away... I was a lucky winner of the 'Organize your workbench contest'! A late but big thanks to E14 again and again for giving away free stuff, that is actually useful. I received one of the Duratool storage ...
    • 13 Aug 2022
  • EasyTempProbe: A Bluetooth (BLE) Dual Thermocouple Temperature Probe

    shabaz
    shabaz
    Table of Contents Introduction Building the BLE EasyTempProbe Programming the EasyTempProbe Using the EasyTempProbe Summary Introduction This blog post discusses a really simple dual-thermocouple measuring device designed with very low cost...
    • 9 Aug 2022
  • Bluetooth LE Transmit Testing with the FPC1500 - Summary

    ralphjy
    ralphjy
    Previous Table of Contents Blog 1: Bluetooth LE Transmit Testing with the FPC1500 Blog 2: Getting Started Blog 3: BLE Development Boards Blog 4: Test Development Blog 5: ESP32 Measurements Blog 6...
    • 22 Jul 2022
  • Bluetooth LE Transmit Testing with the FPC1500 - CYW43 Measurements

    ralphjy
    ralphjy
    Previous Next Table of Contents Blog 1: Bluetooth LE Transmit Testing with the FPC1500 Blog 2: Getting Started Blog 3: BLE Development Boards Blog 4: Test Devel...
    • 18 Jul 2022
  • Bluetooth LE Transmit Testing with the FPC1500 - nRF52 Measurements

    ralphjy
    ralphjy
    Previous Next Table of Contents Blog 1: Bluetooth LE Transmit Testing with the FPC1500 Blog 2: Getting Started Blog 3: BLE Development Boards Blog 4: Test Devel...
    • 16 Jul 2022
  • Bluetooth LE Transmit Testing with the FPC1500 - ESP32 Measurements

    ralphjy
    ralphjy
    Previous Next Table of Contents Blog 1: Bluetooth LE Transmit Testing with the FPC1500 Blog 2: Getting Started Blog 3: BLE Development Boards Blog 4: Test Devel...
    • 8 Jul 2022
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