Arduino Stepper Motors

When we need precision and repeatability, a stepper motor is always the solution. With the way it is designed, a stepper can only move from one step to the next and fix in that position. A typical motor has 200 steps per revolution; if we tell the motor to go 100 steps in one direction, it will turn exactly 180 degrees. It gets interesting when we only tell it to go one step and it turns exactly 1.8 degrees ...

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Arduino Stepper Motors

When we need precision and repeatability, a stepper motor is always the solution. With the way it is designed, a stepper can only move from one step to the next and fix in that position. A typical motor has 200 steps per revolution; if we tell the motor to go 100 steps in one direction, it will turn exactly 180 degrees. It gets interesting when we only tell it to go one step and it turns exactly 1.8 degrees ...

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Arduino VFD Display Clock Tutorial – A Guide To VFD Displays

Do you (still) remember the display of your old CD player, HiFi system or car radio? Have you ever noticed the displays used at your local supermarket that shows you the scanned item and the price of it? These displays have a characteristic beautiful bright blue-green colored glow in common: These are so called vacuum fluorescent displays (VFDs) with outstanding brightness that look pin sharp. Used to repla ...

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Add a fuse where it´s desirable

Nowadays, when “almost everything” works on electricity we can see still more devices connected to mains line. That´s why it often happens, that many small-power devices are connected to one (circuit breaker fused) line. To increase a safety, it´s usually advantageous to fuse particular devices separately – for example by small glass fuses. Somewhere it´s advantageous on a panel or directly on a PCB, elsewh ...

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Cliff knobs – a pleasure to touch

A device with excellent specification, quality components used, …., but a one step is still missing to reach a great overall impression - it is to use a quality and aesthetic control components. Probably you´ll agree, that knobs for potentiometers and encoders belong to a “group of critical components”, determining a resulting look of a device. Company Cliff specializes on development and production of thes ...

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The Art of Representing Floating-Point Numbers as Integers

Have you been using float or double variables to perform mathematical operations on embedded systems without a Floating-Point Unit (FPU)? You are doing it wrong! That’s incredibly inefficient. Use fixed-point representation instead. An FPU is an hardware block specially designed to carry on arithmetic operations on floating point numbers. Even though the C/C++ code may work without an FPU, it’s always much ...

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Soldering Station

At the fpv-community.de Forum I read about a DIY Weller station designed by Martin Kumm. Basically an Arduino shield to drive a Weller soldering tip. As there is not much to it, the board simply contains an precision OpAmp, a power MOSFET, 2 buttons for adjusting the temperature and a display to show the current values. This design looks like a good starting point for my own advanced project. As I have late ...

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SIMPL Revisited – Again, but this time it’s personal

In May 2013, I learned about Ward Cunningham's Txtzyme language - a very simple serial command interpreter which allowed basic control of microcontroller function using a serial interface. I wrote about it here: Txtzyme - A minimal interpretive language and thoughts on simple extensions Tytzyme was about as easy as a "language" could get, it offered digital input and output, analogue input, rudimentary timi ...

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A Cheaper ESP8266 WiFi Shield for Arduino and other micros

Update: 19th May 2016 Rev 14 of this project revises libraries and code to work with ESP8266.com IDE plug-in V2.2 Update: 17th December 2105 Rev 11 of this project cleans up other attempted connections if it is already connected. Also uses the timeout set by the web config. Rev 10 ignored the timeout setting. Update: 11th November 2015 This is Rev 10 of the this project. Rev 10 uses a non-blocking WiFi libr ...

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Unipolar 4-Phase Stepper Motor Controller

C055_1 This project is a 4-phase unipolar stepper motor controller. Description Unipolar 4-Phase Stepper Motor Controller Board will help you control a Stepper Motor or 4 individual Solenoids. This circuit consisting of transistors that serve as current amplifier and also diode to prevent damaging back EMF, circuit uses Darlington transistors to provide high current capacity to unipolar stepper motor. Just ...

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Mini 7-Segment Clock V3

While I waited for the Mini 7-Segment Clock v3 PCBs to arrive, I got to work on designing an enclosure. First, I exported the PCB from EAGLE to SketchUp. I then assembled a complete 3D model with all the necessary components. With the 3D model complete, I could then design an enclosure to house the PCB and know exactly what it's going to look like before printing it. I even incorporated a little cable strai ...

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OLED displays for still better prices!

The most advanced display technology – OLED, goes ahead into many industrial products thanks to its advantages. From a certain point of view exactly the industrial environment properly checks features of displays and especially in critical applications extreme thermal resistance a big advantage (immediate response even in frost). As it uses to be, new technologies are rarely cheap. In case of OLED we can sa ...

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