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First draft of a circuit for connecting a CD-ROM motor to an Arduino so that it acts as a rotary sensor. I want to make it into a spinner control, rather like those which are used to control video playback. Normally, the Hall-effect sensors are connected to the motor driver chip and control the commutation. I've wired them to a comparator chip (TLC3704) and then to the Arduino.
Participants in the first of our two-part microcontroller basics class, presented by Dave O. of CreatorSpace, enjoyed the excitement of circuit building, making lights blink and sensors react by entering and changing only a few simple lines of computer code. Both the kits and the laptops were generously donated by United Space Alliance.
I'm still exploring the basic behaviors of transistors and capacitors, since I've never seen them explained terribly well beyond "capacitors store charge!" and "transistors switch and amplify!"
I'd gotten the Parallax BASIC Stamp HomeWork board for Christmas, but never got around to programming it since, well, it's programmed in BASIC, and the BASIC tokenizer doesn't work under Linux (well, not without some trickery, anyway). Compare that with the Arduino, which can be up and running in a matter of minutes, and uses C/C++ and the GNU toolchain.
I picked up the voltmeter at Ax-Man Surplus. It looks nifty and chunky, but unfortunately the needle isn't damped at all, so it wobbles a lot when voltage goes on or off. It's an EMICO NF2C-2137. The company is "Electro-Mech. Inst. Co. Inc., Perkasie., PA., U.S.A." Ah, the goold old days, back when the period was the "e-" or "i-" prefix of its day (and yes, there was really a period after "Perkasie" on the label)..
An Atmel ATtiny24 microcontroller drives an R/C servo wich in turn rotates a line LASER taken from a LASER level.
The microcontroller runs a software real time clock and turns the servo and the line LASER to mimic the shadow cast from the style of a sundial as the time goes.
Looking a little worse for wear, looks like it's been left outside! I love this little WiFi microcontroller, it's so versatile! This was the core of my breadboard Geiger counter project.
The readers of ECN Magazine selected Microchip's next-generation, MPLAB® X IDE as the winner of the 2011 ECN Readers’ Choice Tech Award, in the Software category. MPLAB X was chosen because it built on Microchip’s leadership position—as the only company to support its entire portfolio of 8, 16 and 32-bit microcontrollers—by moving to an open-source IDE that enables cross-platform embedded development with the Linux, Mac OS® and Windows® operating systems. For more info, visit www.microchip.com/mplabx
High school students study arduino microcontrollers during the Design It. Build It. Summer Engineering Workshop at Dartmouth.
Photo by Alex Arcone.
2Pcs MAX3232 RS232 Serial Port To TTL Converter Module DB9 Connector With Cable
2 PCS for EUR 2,61
100% Brand New
Size: Approx 3.3cm x 3.5cm x 1.7cm(LxWxH)
Cable: 21cm(including 2 ports)
Working Voltage: 3V-5V
Quantity: 2 Pcs
MAX3232 chip
Pin definition: GND, RXD, TXD, VCC, +5V
Package Content:
2 x MAX3232 RS232 Serial Port To TTL Converter Module DB9 Connectors with cable
The idea behind this project is to run a microcontroller and its accessories (LCD's, high speed ADC or DACs, any sort of ANYTHING really) from a single AAA battery. The devices can be tiny and compact, and the MSP430 will last a bazillion years on a single AAA cell anyway. Yes, it does work after only a good 5 hour lab session!
So this is a boost converter that can take anything between 0.7v and 3v and will output a 4.8v signal (for use in 5v logic, LCDs, and backlights) and a 2.5v output for powering the actual microcontroller. It can also output 3v with a resistor change and if I need to I'll add a pot to give a wide range of values.
The board is a lot bigger than it needs to be, but this was more of a proof of concept because I had never built a power converter before. If I was to put this on a PCB I would be able to make it VERY small (smaller than a second AAA cell, wich would validate the effort!)
With a little twist.
Twiddle the knob to change the pretty light display.
(Believe me, I found that tricky enough to implement at first!)
2 drop collision into a water/xanthan gum mix. Colours come from a few drops of ink into both the glass and the drop reservoir and a light blue gel on the flash which is behind a piece of 5mm frosted glass. Taken using the Canon 100mm f2.8 macro lens. Settings: 1/200, iso-200, f/16, flash @ 1/32
Microchip's dsPIC33FJ16 “GP,” dsPIC33FJ16 and PIC24FJ16 “MC” devices enable advanced control for cost-sensitive general-purpose and motor-control applications.
Without a computer or a microcontroller, time machine: inner landscape is interactively controlled by five-fifty-five timer chips and photo resistors which advances slide show imagery and amplified sounds via analog and digital sound circuitry.
by Melissa Clarke
for more info:
itp.nyu.edu/shows/winter2010/2010/12/06/time-machine-inne...
This is a breakout board for the Nordic Semiconductor nRF24LU1+ 2.4GHz transciever with 8051 USB microcontroller core. More information at my blog: www.qwertyboydesign.wordpress.com
Computer controlled shutter for the Automatic 100 series packfilm cameras with manual exposure control. See www.chemie.unibas.ch/~holder/shutterpic/index.html
CORRECTION: The Darlington Transistor is a MJD112 (not 122), any similar NPN Darlington will do.
The Secret Project Circuit Bward She Works! Yhey!
Seen here resting upon The Development Environment of Kings.
This is the first time I've attempted to make a circuit with a surface-mount microcontroller. In this case, a SOIC version of the Atmel ATTiny861. How very encouraging that it works and did not splode!
I goofed and forgot to take a picture of the underside of the assembled board, which is where all the interesting bits are. But you know what? I made two of them, so I can take a picture of the guts after assembling the other one. Or I could just remove the high-tech protective backing on this one, which - like the one on the Ad-Hoc Power Supply - is a piece of cardboard held in place with electrical tape.
Microchip Technology offers the industry's broadest portfolio of semiconductors specified for operation up to 150° C ambient. The portfolio includes 8- and 16-bit PIC® microcontrollers (MCUs) and dsPIC® Digital Signal Controllers (DSCs); serial EEPROM devices, and analog products which are qualified and tested in accordance with AEC-Q100 Grade 0 requirements. For more information, visit: www.microchip.com/get/401065739467593
The 8 pins PIC12F683 microcontroller is one of the smallest members of the Microchip 8-bit microcontroller families but equipped with powerful peripherals such as ADC and PWM capabilities. This make this tiny microcontroller is suitable for controlling the DC motor speed. In order to demonstrate the PIC12F683 capabilities and to make this tutorial more attractive, I decided to use the PIC12F683 microcontroller to generate simple and yet fascinating laser light show from a cheap keychain laser pointer. For more information please visit www.ermicro.com/blog/?p=1622
Talks and performances by people doing strange things with electricity
Fri 23 March 2012, 6.30-10pm with interval at the Showroom Cinema, Sheffield.
Dorkbot is a meeting of people interested in electric/electronic art in the broadest sense; robotics, kinetic art, microcontrollers, interactive art, algorithmic music, net.art... The only real conditions are that it is a bit strange and involves electricity in some way. It is really defined by whoever turns up, be it engineers who want to be artists, artists who want to be engineers, or the otherwise confused.
This MEGADORK event features a cabaret of talks and performances from among the UK's dorkiest, to entertain and amaze:
Paul Granjon - A strange performance from the world renowned self-styled robot artist.
Patrick Tresset - Talks about his drawing robot Paul (on show as part of the Alan Turing: Intuition and Ingenuity exhibition).
Daniel Jones and James Bulley - talking about generating live music from patterns of weather.
www.variable4.org.uk/about/intro
Sarah and Jenny Angliss - playing robot music from past futures.
spacedog.biz
Sergi Jorda - talks about the Reactable tangible tabletop music playground (which you'll be able to try out at the Central Library Saturday 24 March)
Dan Stowell - Demonstrates his use of the Risset illusion in techno music.
Silicone Bake - Live coded pop songs about love, death and counterfeit watches, where all lyrics are taken from spam emails.
Megadork is curated by Alex McLean.
Dorkbot started in New York, spread to London, and now dozens of cities around the world, including several active UK chapters; Sheffield, Bristol, Anglia, Newcastle, Cardiff and Alba (Scotland). Find out more at: www.dorkbot.org
Lovebytes 2012 - Digital Spring
A Festival of Art, Science and Technology
22-24 March
Sheffield UK
I made a Mandelbrot Set viewer with an Arduino. It does zooming and it's pretty cool.
There's a video at www.youtube.com/watch?v=ArPrnud6O7A
More details at feelslikeburning.com/projects/mandelbrot including schematics and code.
Russ connected an MCP4822 dual 12-bit digital-to-analog converter (DAC) to the fine Tektronix 2213A oscilloscope. A program (sketch) on the Arduino microcontroller drives the DAC and generates the image by steering the scope's CRT beam along the lines in the drawing (vector-scan). en.wikipedia.org/wiki/Vector_monitor
Photographed at the Bristol Hackspace: bristol.hackspace.org.uk/
With LCD panel removed.
The "old school" 89C52 microcontroller seems incongruously large!
One would normally expect a PIC or an Atmel micro these days . ...
Because there were some questions, here a picture of my microcontroller hardware. I added some notes to the picture.
As the electronics hobbyist one of knowledge that we have to be familiar with is how to make our own printed circuit board (PCB). Making our own simple single side PCB actually is not require a sophisticated technique and technology as you might think, instead most of the required materials is already available at your home. For more information please visit www.ermicro.com/blog/?p=1526
In June, the Friends of Freeman Library received a generous $1,000 donation from United Space Alliance. U.S.A.'s donation supported the purchase of at least a dozen Sparkfun Inventor's Kits, which will allow older kids and teens to learn in a series of special library programs the basics of microcontrollers and how they work. Our CreatorSpace partners have also pledged help with instruction in these programs. Many thanks to U.S.A. and CreatorSpace for their continued support of Freeman Branch Library!