1000 steps Servo motor


TheSuperSewcio @ instructables.com shows us how to control a servo motor in high precision using Arduino:

In many project like CNC machines people use stepper motors. They are probably always more expensive than servos. They can rotate 360°, 1 step = 1,8° (mostly). Servos can rotate only from 0° to 180°, 1 step = 1°. But why are they working this way, inside them we will find potentiometer which rotates as servo (up to 180°), but have 1024 steps.

1000 steps Servo motor – [Link]

ESP8266 RGB Color Picker


In this project, you’re going to build a web server with an ESP8266 to remotely control an RGB LED. This project is called ESP8266 RGB Color Picker.

ESP8266 RGB Color Picker – [Link]

Running NodeMCU on a battery


ESP8266 low power consumption revisited:

Using Wi-Fi is a convenient way to link your newly created IoT device into your existing IT infrastructure – including cloud services – but it also has a drawback. Wi-Fi’s demand for power usually makes battery operation impractical for any real deployment. I have been able to get around this issue for most of my projects (e.g. the train and the smart shelf described on this blog) because they are for demonstration purposes only, requiring the battery to last no longer than a few hours.

Running NodeMCU on a battery – [Link]

384:LED – Mini RGB LED array


Mini (1.44” x 0.94” or 24mm x 37mm) 8X16 RGB LED Array. 128 RGB LEDs with three LED chip each gives 384.

For this project I designed two PCBs. A control PCB and a LED PCB. My goal was to fit them both in a small panel inside a 5×5 cm square to use cheap Chinese Manufacturing offers. Both PCB to have the same size and will be connected with 50mil / 1.27mm pin headers. The LED PCB will be stacked on top of the control PCB.

384:LED – Mini RGB LED array – [Link]

Oscilloscope Vertical Position and Offset explained

This video describes the function of the vertical position and vertical offset controls of a modern digital oscilloscope. It shows how using the offset control can provide valuable visibility of the DC bias and small signal waveform simultaneously, which can be very valuable in many applications.

Oscilloscope Vertical Position and Offset explained – [Link]

Piggybacking OLED display on WeMos D1 Mini


Daniel Eichhorn build a mini OLED display weather widget using WeMos D1 Mini board.

Inspired by Mike Rankin’s (@mikerankin) beautiful crossovers between an ESP8266 ESP-01 and an 0.96 Inch OLED I2C display I decided to try if there wasn’t an easy hack to marry the two components with as little soldering as possible. After turning, connecting and flashing different combinations of the two modules I finally found one that only requires you to solder 4 connections.

Piggybacking OLED display on WeMos D1 Mini – [Link]

WiFi Weather display using a Wemos D1 board and operweathermap.org website

educ8s.tv published a new project, a ESP8266 Wifi weather display.

In this video we are going to build a WiFi Weather display with the impressive Wemos D1 board. The board uses the ESP8266 chip in order to connect to the internet and we are going to program it using the Arduino IDE. The project gets weather data from the openweathermap.org website and displays some of the data on the display. As you are going to find out, you can build this project in less then 10 minutes. Let’s start!

A few weeks ago I published a video about the impressive WeMOS D1 board which is an ESP8266 based board which resembles the Arduino Uno. Today we are going to build our first project with it. A weather display, using this old LCD display shield I was using with Arduino Uno a long time ago. As you can see, the display works fine with the WeMOS D1 board! The project, connects to my WiFi network, and then it downloads the weather data for my location from the openweathermap website, and prints some of data in the display! It downloads new data for my location every 10 minutes. It is nice project to start with the ESP8266 chip. Let’s see how to build it.

WiFi Weather display using a Wemos D1 board and operweathermap.org website – [Link]

Dual axis solar tracker with online energy monitor


by geo bruce @ instructables.com:

The features of this solar tracker are:

  • Solar tracking: making sure the solar panels are aligned to the sun as long as possible.
  • Energy monitor: This measures the voltage and the current generated by the panels and calculates the generated Power and Energy.
  • Data logging: this sends the data from the energy monitor into the cloud of ThingSpeak.
  • Also there is an LCD to display the values of the energy monitor

Dual axis solar tracker with online energy monitor – [Link]

Seeed Studio miniature soldering iron – Review


by Harry Baggen @ elektormagazine.com

The Chinese company Seeed Studio offers a lot of interesting things for electronics enthusiasts. Along with selling products from various manufacturers, Seeed develops and produces their own products, many of which are very innovative. For instance, a year ago we had a close look at the DSO Nano V3 miniature oscilloscope.

Seeed has also developed their own miniature soldering iron, which is now available in a European version. The unique thing about this soldering iron is that a display and the control circuitry are integrated into the grip. From the photos and Seeed’s description, it looked like a good idea for us to get our hands on one and try it out in the Elektor Labs.

Seeed Studio miniature soldering iron – Review – [Link]

Very low power temperature sensor


Smartec has commenced selling a new temperature sensor as the successor to the SMT160: the SMT172. The SMT172 has a superior performance, such as a very low power consumption (60 μA) , a very high accuracy (0.1 °C) and a very high resolution (0.1 mK). [via elektormagazine.com]

For battery applications, the SMT172 can operate on the basis of a low voltage range from 2.7 V and 5.5 V. The sensor has a PWM Out for easy connection to any type of microcontroller.

The new SMT172 is available in TO18, TO92, TO220, SOIC-8, SOT223 as a small hybrid device (HEC) and comes with a cable of 5 m length.

Very low power temperature sensor – [Link]