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Archive for the ‘tutorials’ Category

Why electrolytic capacitors are actually kinda shitty

Wednesday, March 28th, 2018

Afroman writes, "Electrolytic capacitors are common, but knowledge of their limitations is uncommon. A demonstration is shown highlighting the difference in performance between electrolytic and ceramic capacitors in power supplies. Other topics discussed in the video: Electrolytic capacitor construction, ceramic capacitors, ESR, ESL, impedance curves, why “0.1uF”, and more." Via Afrotechmods....

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Posted in tutorials | 2 Comments »

Alexa (Echo) with ESP32 and ESP8266 – Voice controlled relay

Tuesday, March 27th, 2018

Rui Santos writes, "In this project, you’re going to learn how to control the ESP8266 or the ESP32 with voice commands using Alexa (Amazon Echo Dot). As an example, we’ll control two 12V lamps connected to a relay module. We’ll also add two 433 MHz RF wall panel switches to...

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Posted in tutorials, wireless | No Comments »

DIY Arduino PCB Pryamiduino

Wednesday, March 7th, 2018

A how-to on designing a DIY Arduino PCB Pryamiduino from Bald Engineer: Continuing the DIY Arduino tutorial series, this AddOhms episode shows how to create a PCB in KiCad. I make a joke that the original design was a rectangle, which I found boring and pointless. So instead, I designed a...

Posted in PCBs, tutorials | No Comments »

Debug SONOFF AC relay with a thermal camera

Tuesday, February 27th, 2018

James Lewis shares his experience in debugging SONOFF AC relay with a thermal camera: The clever solution seemed to be clever, at least for a few minutes. Suddenly the light turned off. I thought maybe there was a timeout for the manual button. Annoying, but workable. The lamp remained off for...

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Posted in measurement, tutorials | 2 Comments »

ESP8266 Wi-Fi button – DIY Amazon dash button clone

Wednesday, January 24th, 2018

Rui Santos over at Random Nerd Tutorials posted a step by step guide on building an ESP8266 Wi-Fi button: In this project you’re going to build an ESP8266 Wi-Fi Button that can trigger any home automation event. This is like a remote control that you can take in your pocket...

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Arduino Tutorial: Adding sensors to your data logger

Monday, January 15th, 2018

Edward Mallon writes: This post isn’t another How-To tutorial for a specific sensor because the Arduino community has already produced a considerable number of resources like that.  You’d be hard pressed to find any sensor in the DIY market that doesn’t give you a dozen cookbook recipes to follow after...

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Posted in Arduino, tutorials | No Comments »

Yet another ARM development tutorial

Tuesday, January 9th, 2018

ARM development tutorial at smdprutser.nl: It has been a while since I wrote about ARM development. I recently made a Black Magic Probe (BMP) clone which acts different then the original. The BMP can source power to the target, but on my version control signal is inverted. Not a big...

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Posted in ARM, tutorials | No Comments »

ESP8266 voltage regulator (LiPo and Li-ion batteries)

Tuesday, December 5th, 2017

Rui Santos writes, "In this guide, you’re going to build a voltage regulator for the ESP8266 that can be used with LiPo and Li-ion batteries." More details at RandomNerdTutorials.com. Check out the video after the break. (more…)

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Posted in tutorials | 5 Comments »

ESP8266 Deep Sleep with Arduino IDE

Monday, October 30th, 2017

Rui Santos has written a great guide shows us what’s Deep Sleep and how to use it with the ESP8266 in the Arduino IDE. With most of the ESP8266 modules, you can’t change the hardware to save power, but you can write software to do it. If you use the...

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Posted in Arduino, tutorials | 2 Comments »

Pulse Oximeter functionality for a medical device

Wednesday, October 18th, 2017

Alexander Lang writes: The gentlemen for whom I'm developing this hardware for has requested some additional functionality. The additional functionality requested is a Pulse Oximetry measurement.  Pulse Oximetry is the measurement of a person's pulse along with how much oxygen is present within their blood.  It is a common measurement...

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Posted in Arduino, tutorials | No Comments »

How to build your own RS232 to TTL converter

Friday, September 29th, 2017

A how-to on making a DIY RS232 to TTL converter by Jestine Yong: As I read many pages on the internet I saw there is a sort of adapter so called “USB to TTL adapter” who can communicate through with the uC. I had not the time to order one...

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Posted in DIY, tutorials | 4 Comments »

Extend Eagle CAD tool with ULPs: Writing your first User language program

Wednesday, June 28th, 2017

Yahya Tawil posted a detailed how-to on writing ULP's for Eagle CAD: In this tutorial, you will learn how to write your first ULP in Eagle CAD to add a new capability to your CAD tool. User Language Program (ULP) is a set of extensions for Eagle CAD users to...

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Posted in Eagle, tutorials | No Comments »

Panelization – using GerberPanelizer on Windows (Linux possible)

Wednesday, May 31st, 2017

Arsenijs over at Hackaday.io writes: This tutorial was done on Windows. Authors claim it could also be used on Linux by using Mono, but I haven't tried and don't understand a lot about Mono to see what could be done. I am switching to Linux nowadays, so I'd be very grateful...

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Posted in PCBs, tutorials | No Comments »

MCUXpresso IDE tutorial series

Wednesday, May 17th, 2017

Erich Styger has made a series of tutorial blog posts on using the new NXP MCUXpresso IDE. Published so far are: MCUXpresso IDE: Unified Eclipse IDE for NXPs ARM Cortex-M Microcontrollers MCUXpresso IDE: S-Record, Intel Hex and Binary Files MCUXpresso IDE: Adding the Eclipse Marketplace Client MCUXpresso IDE: Importing Kinetis...

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Posted in ARM, tutorials | No Comments »

Build your very own drink mixing robot

Tuesday, May 9th, 2017

https://youtu.be/V-PAW3KoB_A Yu Jiang Tham designed and built his own bartender robot named Bar Mixvah, that is available on Github: I built a robot that mixes drinks named Bar Mixvah.  It utilizes an Arduino microcontroller switching a series of pumps via transistors on the physical layer, and the MEAN stack (MongoDB, Express.js,...

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Posted in 3D Model, Arduino, DIY, tutorials | No Comments »

Pool playing robot

Monday, May 8th, 2017

BVarv  wrote an instructable detailing the build of his pool playing robot project with Arduino: I redesign the prototype with servos, belts and gears at the points of rotation to add programmable motion. While doing so, I stumble across an easy win. It turns out that the "parked under the table"...

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Posted in Arduino, tutorials | No Comments »

DIY polarity Led tweezers

Thursday, May 4th, 2017

Jesus Echavarria shared detailed instructions of how to make a simple tweezers for checking led polarity: I usually assemble by hand all the boards I make. I use SMD components, especially in 0805 format for resistors, capacitors and leds. With the last ones, I always have the same problem: I need...

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Posted in DIY, tools, tutorials | No Comments »

Fun with 1.1GHz Potato chips

Wednesday, May 3rd, 2017

https://youtu.be/8rRRvgjLjZU Afroman writes, "I built a ring oscillator using a 1.125GHz 74 series logic inverter IC from Potato Semiconductor. It was fun." Via Afrotechmods.

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Posted in tutorials | 1 Comment »

Siglent SSA3032X Spectrum Analyzer review & experiments

Tuesday, April 25th, 2017

https://www.youtube.com/watch?v=uA4SvTBCAXU Afroman did a review of the Siglent SSA3032X Spectrum. More details at Afrotechmods tutorial page.

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ESP32 web server – Arduino IDE

Tuesday, April 18th, 2017

Rui Santos from Random Nerd Tutorials has posted a detailed tutorial on how to create a standalone web server with an ESP32 that can toggle two LEDs using the Arduino IDE. Full details at Random Nerd Tutorials homepage. Check out the video after the break. (more…)

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Posted in Arduino, tutorials, wireless | 1 Comment »

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Recent Comments

  • Craig B: Shouldn't the default be 00xxx010? Note that bit 0 appears out of order in the documentation. In that case I think the initial value is...
  • JJM: From the datasheet extract you are showing, the power up status should be 00xxx010, not 000xxx01. Bit numbering is misleading since 'measurement resolution' is apparently...
  • Jan Ciger (@janoc200): Hmm, that could actually explain why the three sensor IMU breakout I have bought a few years ago had all sorts of issues - I...
  • Travis: Is it preset to the windows 3 fingered salute?
  • Glenn: What a cool idea !