Building and Flashing ESP32 applications with Eclipse

Erich Styger shared the steps how to use Eclipse with CMake: The current Espressif documentation integrating with Eclipse are kind of broken and did not work for me (they are changing from make files to use CMake).  The good news is that I have found a way to easily integrate the IDF with Eclipse which […]

Building a direct conversion receiver

Ryan Flowers over at MiscDotGeek posted a how-to on building a direct conversion receiver: In the first installment of this series, we discussed why we’re building a Direct Conversion receiver and talked about some basic ideas. In this installment, we explore what it takes to make the leap from a printed schematic to something physical […]

DakBoard family calendar with Raspberry Pi Zero W and Read Only filesystem

Scott Hanselman made this DakBoard family calendar with Raspberry Pi Zero W and wrote a post on his blog detailing its assembly: The implementation is simple genius. It’s a browser that starts up full screen (kiosk mode) and just sits there and updates occasionally. DakBoard provides the private webpage and tools to make that happen. […]

Custom 3D printed magnetic encoder disks for robotics projects

A how-to on making a custom DIY magnetic disk encoder by Erich Styger: I’m making great progress with the firmware for the new Mini Sumo Robot (see “New Concept for 2018 Mini Sumo Roboter“). The goal is a versatile and low-cost Mini Sumo robot, and the robot comes with the feature of magnetic position encoders. […]

Programming STM32F103 Blue Pill using USB bootloader and PlatformIO

Coyt Barringer wrote a post on his blog showing how he program the Blue Pill STM32F103 using USB Bootloader and PlatformIO: This is the infamous Blue Pill board – a $2 ARM STM32F103 development board with all the capabilities of a Teensy 3.x at a fraction of the price of an Arduino. So what’s the […]

How to: STM32F103C8T6 as an USB device (Virtual serial port / CDC)

In this video Hugatry shared detailed instructions of how to use the STM32F103C8T6 as an USB device with virtual serial port: Cheap STM32F103C8T6 development board Blue STM32F103C8T6 development boards, also known as “BluePill”, are cheap way to get started with 32bit ARM microcontrollers. The STM32 development board can sometimes be bought for less than $2 […]

Tutorial, experiments and teardown of a 77GHz automotive FMCW radar module

Tutorial, experiments and teardown of a 77GHz automotive FMCW radar module from The Signal Path: In this episode Shahriar explores the principle operation of automotive FMCW radars. Thanks to a donated automotive radar module, various components of the system can be examined and explored. The PCB reveals three die-on-PCB ASICs responsible for generating and receiving 77GHz […]

Teardown and analysis of an Agilent 86109B Optical/Electrical DCA-X oscilloscope module

Teardown and analysis of an Agilent 86109B Optical/Electrical DCA-X oscilloscope module from The Signal Path: In this episode Shahriar presents the inner workings of an Agilent 86109B optical/electrical DCA-X oscilloscope module. This particular model offers up to 50GHz of electrical bandwidth and an optical input capable of receiving up to 40Gb/s data rates. The differences […]

Building a tracking generator

A how-to on building a tracking generator using off-the-shelf components by Kerry Wong: In this blog post, I will show you how to build a 0 to 5.8 GHz tracking generator for the HP 8566B 100 Hz to 22 GHz spectrum analyzer using off-the-shelf components for under $100. Although this tracking generator is specifically designed for […]

Tutorial on the theory, design and characterization of a CMOS transimpedance amplifier

Tutorial on the theory, design and characterization of a CMOS transimpedance amplifier from The Signal Path: In this episode, Shahriar and Shayan discuss the design and characterization of a deceptively simple CMOS inverter-based transimpedance amplifier. The the large and small signal behavior of the CMOS inverter is discussed and measured using the Keithley 2450 and […]