3A Unipolar Stepper Motor Driver

This tiny Unipolar stepper motor driver has been designed around SLA7078MPR IC from Sanken, It is unipolar stepper Motor driver can handle current up to 3 Amps, micro-stepping up to 1/16 steps. On-board Jumpers to set the Micro-stepping, Preset (Potentiometer) to set the current. The SLA7070MPR series motor driver ICs features unipolar drivers. The clock-in type input interface allows simplified control log ...

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Arduino LED Wall clock using WS2811

First Hello instructables. This is my first contact with : Instructables Arduino Programmable LED's So please don't trow rocks at me for noobish mistakes. Keeping that in mind I'm waiting to read your comments with grate interest and I'm open to any suggestion Features : big digits ( each digit is approximately the size of a A4 paper). slim in order to fit in a photo frame (a big one). auto dim the light de ...

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The Pendulum Clock

If you've ever rode the Link Light Rail in Seattle to the airport, you may have glanced out of the window while traveling through a tunnel and seen playing cards illuminated on the walls. These images are not made from two dimensional screens. Each display is just a row of lights that changes rapidly as the train drives by, giving the illusion of a two-dimensional picture. The University Street station also ...

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IP Time Clock using NTP protocol

REQUIREMENT: WiFi Access with SSID and password if necessary So this Lazy Old Geek (LOG) has a couple of clocks in my bedroom. One of them loses time when the power is lost. The other is semi smart and automatically adjusts for Daylight Savings Time. Unfortunately, it does this using the old standard so I have to re-set the time four times a year. Well, I’m LAZY so I decided to make my own Clock. At first I ...

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Arduino Chess Clock – Multi-game Box

Hey folks! After making an Arduino smartwatch just last week, I received many complaints,or tips, to use a RTC (real-time clock) module. That's because the Arduino timer is not very precise, it can lose a couple a minutes along a full work day. Luckly, I had one of those modules at my home, I decided to give it a try. However, I faced some challenges along the way, as I can show you here. This is my weekend ...

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Arduino DCF77 Master Wall Clock

Arduino Master Wall Clock. Time displayed on large 1" (26mm) 7 segment displays with secondary 4x20 LCD information display. The clock can be used stand alone or provides the following pulses to drive slave clocks 1 sec alternating, 30 sec, 1 min , 1 hour, 24 hr, 15 min chime of quarter hours, hourly chime of hours. An Arduino 328 Microprocessor is used to decode and display time & date from the DCF77 " ...

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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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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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6 Digit LED Clock

I recently found six 2.3″ red 7 segment displays in my collection which I purchased from Rapid Electronics when they were clearing out non-RoHS stock. Since I have no clock at my work bench I decided to construct one from some prototyping pad board, a Microchip PIC18F26K20 microcontroller and a Dallas DS32KHZ temperature compensated 32.768kHz crystal. The displays I used are SA23-12SRWA, which don’t appear ...

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Nixie Tube Clock

If you've poked around the internets where electronics hobbyists collect, it is likely that you are acutely aware of our incontrovertible affinity for building timekeeping clocks.  It is similarly unlikely that you have been able to evade the plenitude of nixie tube based projects.  There is a reason for this. Nixie tubes are cool.  They have great aesthetic appeal with their difficult-to-photograph, warm o ...

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Large 7-Segment Clock, Part I

I was extremely satisfied (and proud) of the way that the enclosure turned out for the rework of my 7490 Clock. The electronics on the other hand, is another story. Since it was one of the first things I ever built, I decided to put it in an enclosure of its own and consider it too as a finished product. The problem was that the prototype never ran properly. It worked, just not as well as it should. Needles ...

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New Product – VFD Modular Clock IV-18 SMT

We showed a demo of this clock at Maker Faire Tokyo 2014 and it is now available in our online shop! VFD Modular Clock IV-18 SMT edition is a special solder-free kit version of the original VFD Modular Clock . The kit comes with all electronics pre-soldered, but you still assemble the enclosure yourself. Features: IV-18 8-digit Russian VFD Display Tube Open source mbed based firmware LPC1347 ARM Cortex-M3 6 ...

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