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The PIC16F1934/6/7 are the first microcontrollers to feature Microchip's enhanced Mid-range 8-bit core.
Together with the experience of the promoter in projects involving Government Sectors and Private Industrial Sectors,Techon Electro Controls now looks forward to participating in the International projects to carrying out Design, Manufacturing,Installation and commissioning of Small,Medium & Large Captive Power Plants as well as complete power utilization & distribution solutions.
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I happened to have a large (25mm) seven-segment green LED display. Each segment has two LEDs in series, so it needs 100Ω resistors.
I ordered a couple of AVR microcontrollers to play with, and while I'm waiting for them to arrive, I built an in-system programmer cable of the simplest type--the passive parallel-port-bit-banger. It was more of a hassle than I thought it'd be--maybe I should have just ordered one of these.
Each HP DL1414 display can show four characters in red LED segments. They need seven bits for ASCII input, plus two bits to select a digit and one to act as a write strobe.
This is an RGB controller for 16 RGB LEDs. It is based on the TLC5940 PWM LED controller and an ATTiny44. Those who read the datasheet for the TCL5940 or have used it in the past will say "wait, 16 RGB LEDs on ONE TLC5940?". Actually, the setup could control 32 RGB LEDs and still look acceptable. I am strobing the RGB anodes with power, and connecting the TLC5940 to common cathodes. This is intensive for the AVR because it must shift out the whole array and activate the new PWM settings before switching to the next color. It does work rather well, if you don't need dot correction. The normal approach to this array would use three TLC5940 chips for each row, which isn't acceptable for my 24x16 array. That would require 72 driver chips doing it the "right" way. My way requires only 12 driver chips (one TLC5940 controls 32 RGB LEDs = 96 individually PWM controlled LED elements).
The Digilent Pmod MTDS is a gorgeous 2.8" touchscreen display with a powerful on-board microcontroller that performs graphics processing tasks. The display is a capacitive touchscreen with QVGA resolution (320×240) and 2 finger multi-touch support.
The most compelling aspect of the Pmod MTDS is the programming experience provided by its Multi-Touch Display System (MTDS) Firmware and the associated libraries. These allow you to design sleek, stylish user interfaces very quickly and with very little code. The timing dependent tasks are handled by the firmware, so integrating the display into existing projects is also a snap. Some of the key functionality provided by the libraries include the ability to draw basic shapes and text, draw images stored on microSD with binary transparency, draw buttons and easily check if they have been pressed, and check the status and location of the user's two fingers. The libraries are supported in Arduino IDE and Xilinx SDK, and have been tested with Ardiuno, chipKIT, and Arty host boards.
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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
Together with the experience of the promoter in projects involving Government Sectors and Private Industrial Sectors,Techon Electro Controls now looks forward to participating in the International projects to carrying out Design, Manufacturing,Installation and commissioning of Small,Medium & Large Captive Power Plants as well as complete power utilization & distribution solutions.
After soldering some wire to short the 12 resistors on the LoL Shield I've uploaded some example code to test the LEDs - I find that I've got one duff LED that needs investigating to see if it's my soldering or just a dead LED.
Sanguino is an open source Arduino-compatible microcontroller board that is based on the Arduino, and inspired by the Boarduino form-factor. It uses the atmega644P chip which has 4x the memory, ram and 12 more GPIO pins than the Arduino's atmega168.
More info: make.sanguino.cc/1.0
Sanguino is an open source Arduino-compatible microcontroller board that is based on the Arduino, and inspired by the Boarduino form-factor. It uses the atmega644P chip which has 4x the memory, ram and 12 more GPIO pins than the Arduino's atmega168.
More info: make.sanguino.cc/1.0
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
Perpetual Electro mechanical Calendar Clock powered by an Arduino Microcontroller. Full Westminster Chime of Quarter Hours and Hours.
The Digilent Pmod MTDS is a gorgeous 2.8" touchscreen display with a powerful on-board microcontroller that performs graphics processing tasks. The display is a capacitive touchscreen with QVGA resolution (320×240) and 2 finger multi-touch support.
The most compelling aspect of the Pmod MTDS is the programming experience provided by its Multi-Touch Display System (MTDS) Firmware and the associated libraries. These allow you to design sleek, stylish user interfaces very quickly and with very little code. The timing dependent tasks are handled by the firmware, so integrating the display into existing projects is also a snap. Some of the key functionality provided by the libraries include the ability to draw basic shapes and text, draw images stored on microSD with binary transparency, draw buttons and easily check if they have been pressed, and check the status and location of the user's two fingers. The libraries are supported in Arduino IDE and Xilinx SDK, and have been tested with Ardiuno, chipKIT, and Arty host boards.
This is an laser cut enclosure for mobile arduino prototyping. I will start selling this soon. A bit more testing is needed.
Check:
The 20x4 LCD for the Arduino, on its new brass stand. It's made out of a 100mm brass hinge, the type with steel washers. It has enough friction to stay at the angle you want, and it's heavy enough to make a stable base for the LCD. The LCD is held on by two M3 bolts and the hinge has three non-slip plastic feet under it to protect the table-top.
Not so interesting or material this week - need to write the software for the die roller. Though electronic component fiddling does resemble playing with Legos, microcontroller-based projects also have a programming side that needs to be done and in which I am more at home, being a long-time software guy and a novice hardware engineer.
I'm pretty busy this week, too, so I doubt I'll finish it today, but it shouldn't take long.
In case you were wondering, this is what the software development environment for the Microchip PIC microcontrollers looks like, if you develop in assembly language. Details on request. This is a slightly weird angle on it, since it is a Windows program and I'm running it under "wine", which is a pretend-Windows environment that runs under Linux. It's a little bit hiccupy that way but lets me do the typing and some testing. I haven't tried actually sending the program to the chip from this Linux laptop - I use the tiny Windows netbook for that since it fits handily on my cluttered hobby table - but I like the Linux machine for the software part since it has a much bigger screen.
The reference to "Nigel code" in the comments is due to a now somewhat dated but still live and useful PIC Tutorial site by Nigel Goodwin. It has several useful examples of applications of the PIC chips, from which I've cribbed a fair amount for some of my projects. Its attached forum shows activity as recently as last August but mostly it went dormant around 2006. Great site for beginners even still.
First step: gather up the parts and decide what kind of connectors to use. Also decide what kind of switch to use for the all-important reset button. Since taking this photo, I've changed my mind about the Molex KK connectors (having had another look at the Arduino), and substituted 32-pin DIN41612 connectors.
Completed circuit showing the status LED on.
Blog Entry:
cmpalmer.blogspot.com/2007/09/arduino-beakmans-motor-and....
Instructables
The milled PCB for the ball-bearing tangible interface, with some of the LEDs attached.
Photographed at the Bristol Hackspace: bristol.hackspace.org.uk/
Product image of components from the Jennic range - www.sequoia.co.uk/components/manufacturer_list.php?m=12&a...
Jennic is a market leader in ZigBee, 6LoWPAN, IEEE802.15.4 wireless microcontrollers, modules and evaluation kits.
The push button in the diagram is the manual water valve control for purging the line (momentary switch, normally open), otherwise the valve only opens when the microcontroller sends out a positive pulse on its output pin to activate the transistor switch and allow current to flow through the solenoid. A diode is placed across the solenoid power lines to prevent damage to the transistor from reverse voltage generated from the inductive load when the power is turned off. This recirculates it back into the solenoid coil instead of into the transistor.
My second printed board, this one much simpler-- a relay circuit for triggering via a microcontroller. 3-pin female header, L-R:
1) Signal
2) +
3) -
I'm happy to provide the complete EAGLE file if anybody is interested.
This uses a Futurlec JQC-3FF-05 relay, and I didn't drill the NC output pad-- just figured I should have a trace for it (?).
I think I turned around this board in under an hour, from the PDF. I'll never use perfboard again, if I don't have to!
UPDATE: re: mightohm's question: the process for making the pcb:
* switch layers in Eagle to display only the top layer, pads, and dimensions,
* "print" and save to PDF,
* in Photoshop, open the PDF at 1200dpi,
* run an action to fill the pad holes and make B+W,
* print with Samsung ML1740:
* 8.5x11 piece of paper with a glossy catalog page taped to it (Sur La Table fwiw),
* printer output set to "transparency" to (hopefully) get more toner,
* cut the pattern out of the middle of the page
* iron onto a slightly over-sized piece of single-sided copper-clad:
* lightly sand with ~220 grit (finest I had around) and cleaned with acetone,
* pre-heated board with iron (piece of paper in between) for ~30s,
* CAREFULLY drop the glossy printout onto the copper, then just as CAREFULLY drop on another (blank) piece of paper, then a paper towel on top of that,
* put the iron on and let it sit for ~30s,
* gently move the iron around, applying pressure for ~1 min,
* remove the paper towel and keep ironing on the paper over the glossy printout for another ~2-10 min (?), maybe moving it around.
* let board cool for a minute,
* drop board into a container with water,
* after a minute, pull paper off and gently scrub off the rest of the pulp with a toothbrush,
* fill gaps/dropouts with an etch-resistant pen,
* drop into ferric chloride bath for a few minutes, checking periodically,
* remove the board and drop immediately into a container with water,
* rinse,
* drill,
* solder,
* circuit check-- pretty much involves cutting solder and scraping down to the fiberglass where solder blobs bridge traces/pads.
* Bob == uncle.
Red wire connects +5V to pull-up resistors. By the way, for a sense of scale, the squared paper in these photos is 5mm.
The chipKIT™ Pro MX4 is a microcontroller development board based on the Microchip® PIC32MX460F512L, a member of the 32-bit PIC32 microcontroller family. It is compatible with Digilent's line of Pmods, and is suitable for use with the Microchip MPLAB® IDE tools. The chipKIT Pro MX4 is also compatible for use with the chipKIT MPIDE development environment.
The chipKIT Pro MX4 provides 74 I/O pins that support a number of peripheral functions, such as USB controller, UART, SPI, and I2C ports as well as five pulse-width modulated outputs and five external interrupt inputs. Fifteen of the I/O pins can be used as analog inputs in addition to their use as digital inputs and outputs.
store.digilentinc.com/chipkit-pro-mx4-embedded-systems-tr...
A sound generator (algorithmic music) based on an ATTINY 85.
Features:
- ALGO pot: choice of algorithm.
- X, Y pots: variables of the algorithms.
- LDR: Light-Dependent Resistor
- Switch: choice between Y and LDR.
- Volume pot.
- Sound output: mono 6.35mm plug.
- Yellow LED: sound LED.
- Red LED: ON/BATT
- Power supply: DC 9V external power supply or battery.
- Powered only when output sound jack inserted.