Thomas Fischl writes: Some applications needs to control the output voltage of a dc/dc converter instead using a fixed output voltage. For example battery chargers has to adjust the output voltage to the current battery level. This page shows how … Read more
Category Archives: how-to
Rui Santos has written an article on SP8266 troubleshooting guide: The ESP8266 has a few common issues, specially when you are trying to flash a new firmware or uploading scripts. This is a companion guide to the Home Automation using … Read more
KF5OBS writes: This article is going to show how to build a minimalistic GPS datalogger. The GPS logger is based on the Arduino platform and stores raw NMEA sentences from pretty much any GPS module to a SD card. More … Read more
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 … Read more
Kenneth Finnegan writes, “In this installment of the “How to Build a Repeater” series, I explain the concept of a simplex repeater and how to assemble one out of an Argent Data ADS-SR1 and a Motorola Maxtrac. Thanks again to … Read more
Ken Shirriff has written an article describing a technique he used for making high resolution integrated circuit die photos: Have you ever wanted to take a bunch of photos of an integrated circuit die and combine them into a high-res … Read more
In this video Craig shows how to build a window comparator with a single Op-Amp: A recent question on the Electrical Engineering Stack Exchange site got me thinking about some interesting window comparator circuits. Here’s how to detect three different input … Read more
Matthew Heironimus posted a step by step guide of his “ultimate” classic game console joystick to USB adapter build: This article describes how to use an Arduino Leonardo or Arduino Micro to make up to three classic console joysticks (e.g. Atari … Read more
KF5OBS writes, “In this video I’m showing how to generate a PWM signal that’s behaving proportionally to analog control signal.” Details at KF5OBS’ blog.
Erich Styger of MCUonEclipse writes: For a space project we have to make sure that things are not failing while our hardware orbits around the Mother Earth. Therefore we are using different static and dynamic analysis tools, and one of it … Read more
An instructables on how to make an Arduino based mini CNC plotter from old DVD drives by Ardumotive_com: For the X and Y axes we will use two stepper motors and rails from dvd/cd drives and for the Z axis we will … Read more
Kerry Wong has written an article discussing the measurement of capacitor ESR using a multimeter and a function generator: Capacitor ESR (Equivalent Series Resistance) measurement is very useful in diagnosing issues with power supplies. In linear power supplies, a high … Read more
Dan Beaven has written up documentation on his Chinese K40 Laser upgrade: I’ve wanted to start playing with Laser Cutter/Engravers for quite a while. I finally happened across a great deal on a Chinese made 40 watt Laser Engraver with the … Read more
Oskar’s tutorial on how to patch the USB Infrared Toy driver into LIRC sources. Get detailed instructions on github. You can get IR Toy v2 for $22.05, including world wide shipping.
Steve Chamberlin wrote a how-to on building your own 68 Katy. We wrote about it previously: Assembling the PCB requires soldering one surface mount component, the 44 pin CPLD in TQFP package. It can be soldered with a standard iron … Read more
A DIY PWM to PPM converter using an Arduino Pro Mini from Al Prettybong. Oscar wrote a post on his blog detailing how Al made it: For radio receiver, there are a few output signal formats. The traditional and also … Read more
Ondřej Karas writes, “One year ago, I published two posts about PWM module driven by IQRF. But there is also another way, how to generate PWM signal from IQRF TR module only. Just simple use PIC peripherals. This post is … Read more
Paul over at DorkbotPDX writes, “Often I throw together a quick demo for the bi-weekly DorkbotPDX meetup, usually involving one or more pots to adjust parameters. Finally, I’ve come up with a pretty good way to put pots on solderless … Read more
Iñigo of ElektroQuark shares his experience with DirtyPCBs (machine translation). He talk about how to order at Dirtypcbs.com and how to prepare files from KiCAD for DirtypPCBs. Via the contact form.
An instructables on how to make a WiFi smoke detector by Proto G: This is a simple WiFI Smoke Detector that texts me when it senses smoke. I made this for my battery storage area in case of a lithium … Read more