View allAll Photos Tagged pwm
Aversa, Italia • Stefania Salzillo è un avvocato, abita ad Aversa, vicino a Napoli. La sua famiglia e gli amici l’hanno sempre sostenuta fin dal momento della diagnosi. Attualmente vive con i genitori, ma sta progettando insieme al suo fidanzato Ernesto di andare a vivere insieme. Non nasconde il suo desiderio di maternità, ma l’incertezza sul decorso della SM qualche volta frena i suoi progetti.
Stefania Salzillo drives her car
Credit. walter Astrada
Two busses near the Lincoln Fields bus station in Ottawa, Ontario, Canada. The patterns in the tail lights are caused by the drive circuitry for the lights: power is regulated by rapidly switching the lights on and off (PWM etc.)
Some quick low res phone snaps of my 16mm scale narrow gauge setup guesting at Pendle Forest MRS Show 19th & 20th Nov. (Was too busy with the exhibit to get out the Cybershot & tripod.)
This image shows the exhibit's public facing PWM (pulse width modulation) signalling panel. I have replaced the original push button controls with active lever frames. The kids love it when the trains have to obey their signals.
I monitor the RS lines of the motor hub to read out the information like speed abs position and relative position. Reading out the data goes through my FPGA to the Fischertechnic TXT Controller and the PC. The picoscope is also connected to the hub lines so I can also read out the pwm signals from the motor hub.
Here I mainly want to investigate the influence of a motor load and what the pwm signals look like. The requested speed was 70% and the motor had to rotate 2 revolutions (720 degrees) first down then up. After that there was a small rotation of 50 degrees down, 50 degrees up. After this task, the motor position had to be back to the original value.
I had requested a speed of 70% but the motor only indicates around 59-61. The duty cycle of the pwm signal when descending is about 58% (484.4us on cycle 834 us). If I look up the same position when rising the speed is around 60% and the duty cycle is now 69% (573us on cycle 834 usec). Consequently, you can clearly see the influence of the load.
The setup can be seen in this photo:
Doing binary coded PWM to improve the 32x16 RGB LED panels response. Rather than thresholding the duration based on the intensity, there are now eight periods of increasing intensity for each bit in the 8-bit value. More info: www.nycresistor.com/2013/09/12/octoscroller/
PWM 479J - D W Pink & Sons - BMC FG platform truck (previously with Les Midgeley). Banbury Steam Rally, Bloxham on 26th June 2016
BR Departmental diesel loco PWM 651 at Aviemore. Tuesday 16 August 2011.
Camera: Canon EOS 550D.
Photograph copyright: Ian 10B.
Foto para la 19 Gymkana de Canonistas. Tema: Piel.
Gracias a todos por vuestros comentarios y reconocimientos...
Por favor, no use esta imagen en los sitios web, blogs u otros medios de comunicación sin mi permiso explícito - Todos los derechos reservados ©.
Please don't use this image on websites, blogs or other media without my explicit permission - All Rights Reserved ©.
The Postcard
A Vello Series postcard published by PWM Ltd.
The card was posted in Edinburgh on Monday the 1st. August 1904 to:
Mr. Harry Little,
28 Elm Bank Gardens,
Barnes,
London.
The message on the divided back of the card was as follows:
"1st. August.
I started in C. Jenner & Co.
a week ago, so no more
holidays for me.
I have had your long
epistle.
Yours,
Nell".
Jenners
Jenners Department Store, now known simply as Jenners, is a department store located in Edinburgh, and was the oldest independent department store in Scotland until its acquisition by the House of Fraser in 2005.
Jenners has maintained its position on Edinburgh's Princes Street since 1838 when it was founded by Charles Jenner FRSE (1810-1893), a linen draper by trade, and Charles Kennington.
Princes Street
Princes Street is the southernmost street of Edinburgh's New Town, stretching around 1 mile (1.6 km) from Lothian Road in the west to Leith Street in the east. The street is now mostly closed to private cars, with public transport being given priority.
The street has virtually no buildings on the south side, allowing panoramic views of the Old Town, Edinburgh Castle, and the valley between.
One exception to the no-building rule is the Scott Monument (on the right of the photograph). It is 200 feet 6 inches (61.1 metres) tall. There are 287 steps and no elevator.
The monument has four levels, each narrower at the base than the previous one. A total of 67 figurines from Sir Walter Scott's novels feature on the monument. It cost over £16,000 to build, having started with a budget of £5,000.
Princes Street is named after King George the Third's two sons, the Duke of Rothesay and the Duke of York.
In the 1960's it was proposed to remove all the buildings and replace them with a pro-forma pattern building with a first-level walkway, thereby doubling the shopping frontage. Fortunately the plan was only put into action on a small scale.
The opening scene of the film Trainspotting where Renton is being chased by store detectives takes place in Princes Street.
Vivien Greene
So what else happened on the day that Nell posted the card?
Well, the 1st. August 1904 marked the birth of Vivien Greene (née Dayrell-Browning).
Vivien was a British writer regarded as the world's foremost expert on dolls' houses. She was also the widow of the distinguished novelist Graham Greene.
Vivien Greene's Early Life
Vivien Dayrell-Browning was born in Rhodesia. As a child she spent her pocket-money collecting dolls' house furniture.
She had a difficult childhood: her father had an affair and her mother left him, requiring Vivien at the age of fifteen to write him a letter ending their relationship.
Vivien published her first book The Little Wings, a collection of poetry and prose, when she was thirteen; it had an introduction by G. K. Chesterton, who was a family friend. She began working for Basil Blackwell when she was fifteen.
Marriage, Family and Separation
Vivien Dayrell-Browning started a correspondence with Graham Greene in 1925. A staunch convert to Roman Catholicism, she rejected his initial proposal of marriage because he was an atheist.
Following his conversion, they married on the 15th. October 1927 at St Mary's Church, Hampstead. The Greenes had two children, Lucy Caroline (born 1933) and Francis Hugh (born 1936).
Graham left his family in 1947 and they formally separated in 1948, but in accordance with Roman Catholic teaching the couple were never divorced, and the marriage lasted until Graham's death in 1991.
Dolls' House Collecting
During World War II, Vivien and her children lived in Oxford after their home in London had been bombed. At a local auction she was charmed by a derelict Regency town house which she bought for £5 and took home on the bus with her.
As the war dragged on and her marriage disintegrated, Vivien devoted herself to restoring and furnishing the dolls' house. Materials were scarce; she recalled scraping off old paint and wallpaper with shards of broken glass as well as other endeavours:
"I needed a hobby, the wartime
evenings in the black-out were
long and dark, so I started to
furnish the house, to make carpets
and curtains for it."
Vivien then began seeking out other antique dolls' houses and furnishings with her friend the historian A. J. P. Taylor, researching their history, and restoring the houses, filling the Greenes' rented home with her miniature world.
After Graham had abandoned his family, she travelled the world to add to her collection, becoming a noted authority in the field of antique dolls' houses between 1700 and 1900 and their social history and craftsmanship.
The earliest item in her collection was a William-and-Mary house built in oak in about 1690 in the shape of a cabinet, designed to be displayed in a drawing room.
Dolls' houses were initially created as a status symbol, built as a replica of the owner's home or as an ornament on a staircase landing. Only after the 1840's were they intended for children.
After her children left home, Greene began a personal mission to view, draw and catalogue any historic dolls' houses she could discover before the dolls' houses, and the great English country houses in which they were found, disappeared in the postwar world.
Vivien restored as many as possible to their original grandeur, paying great attention to historical authenticity. Vivien Green's first book English Dolls' Houses of the 18th and 19th Centuries (1955) is credited with convincing dealers and museum curators that dolls' houses were a serious field of study and required conservation.
Her notes record 1,500 dolls' houses that she examined in North America, Europe and South Africa. In 1962 she even made the journey through Checkpoint Charlie to Communist East Germany to research the original plans of 19th century makers of miniature furniture based at Schloss Tenneberg, near Walterhausen Thuringia.
In 1962 she built the Rotunda as a dolls' house museum in the grounds of her home near Oxford, incorporating the spiral staircase from the St James's Theatre. The museum was partially funded by Graham Greene and opened by Sir Albert Richardson, who later donated a dolls' house.
By the mid-1990's, the Rotunda contained over 50 miniature castles, cottages and manors, all furnished down to the last tiny piece of porcelain, dating from c.1700 to 1886. The focus was specifically on the craftsmanship, and only children over sixteen years were allowed to visit on the monthly opening to the public.
Vivien's collection was auctioned off in London in 1998.
Death of Vivien Greene
Vivien Dayrell-Browning Greene died on 19 August 2003 in Oxfordshire, at the age of 99.
Parigi, Francia • La vita è la sua passione. Cucinare, fare sport, suonare il flauto e cantare, giocare con il proprio gatto, sono le costanti della sua giornata. Nella sua vita non c’è solo la SM: c’è tutto il resto! C’è la voglia di muoversi, di fare, di viaggiare… un passo dopo l’altro, un gradino dopo l’altro.
Armelle Bugand walks from the metro, where there is a lack of domotic stairs.
Credit: Lurdes R. Basolì
www.youtube.com/watch?v=p5hzv6m_8fo
final result:
sites.google.com/site/thebluenoisedepartment
DC motor 24V 2A
to test how the motor handles variations in PWM.
2 potentiometers to vary the 'on' and 'off ' time of the pulse.
int ledPin = 13; // LED connected to digital pin 13int h=1;
int h2=0;
int h3=0;
int h4=0;
int h5=0;
void setup() // run once, when the sketch starts
{
pinMode(ledPin, OUTPUT); // sets the digital pin as output
}
void loop() // run over and over again
{
digitalWrite(ledPin, HIGH); // sets the LED on
h5 = analogRead(0); // read the value from the sensor
while(h5>0){
h2 = analogRead(0); // read the value from the sensor
while(h2>0){
h2--;
}
h5--;
}
digitalWrite(ledPin, LOW); // sets the LED off
h4 = analogRead(1)*2; // read the value from the sensor
while(h4>0){
h3 = analogRead(1); // read the value from the sensor
while(h3>0){
h3--;
}
h4--;
}
}
Slutsk, Bielorussia • Joulia Chizhenskaya ha 27 anni, ed è mamma di Kolya. La SM le ha causato un grave problema di mobilità. Vive con i suoi genitori e la nonna. Intrappolata a casa, è la nonna di 72 anni, a prendersi cura di lei.
Joulia Chizhenskaya 27 years old, has a son Kolya, grandmother Valentina Paleskij 72 years old, carries her
Credits: Walter Astrada
Some quick low res phone snaps of my 16mm scale narrow gauge setup guesting at Pendle Forest MRS Show 19th & 20th Nov. (Was too busy with the exhibit to get out the Cybershot & tripod.)
This image shows the exhibit's public facing PWM (pulse width modulation) signalling panel. I have replaced the original push button controls with active lever frames. The kids love it when the trains have to obey their signals.
Little girl and spaniel wait patiently at the ungated crossing.
Fed up with wiring up LEDs just for debugging code. Now it's just 'plug-n-play'.
Shipping of the boards took 4 weeks again ;-(
A few theories:
1) Mailing in December simply sucks
2) Someone at the customs office hates me
3) New regulations to pester people by delaying shipments
4) Extensive scanning of mail for illegal / hazardous substances
5) Some sort of conspiracy against purple PC-boards
6) All of the above
A simple Arduino-library for the MBI5030 can be found on github.
Dublino*, Irlanda • Mary Bartley ha 46 anni. É sposata con Eamon che è il giardiniere della residenza dell’Ambasciatore tedesco. In Irlanda il rapporto fra neurologi e pazienti è molto basso, inferiore a 1:500 (solo la Polonia e la Bielorussia hanno un situazione simile). Di conseguenza i neurologi possono passare poco tempo con i loro pazienti, problema che potrebbe essere mitigato con un sistema di servizi di tipo infermieristico.
Mary Bartley, 46 years old, walks with her dog Dixie in the garden of the German Ambassador residency as her husband Eamon works in a tree. Eamon is the gardener of the German Ambassador residency
Credit: Walter Astrada
This small hybrid module, located in the button of your power drill, does all the power control for the motor... and a good part of the price of your drill.
1934 Wickham Trolley Number 748, Type 17, Works Number 1580 with trailer wagon which was also converted from another Wickham Trolley, a 1948 Type 17a, number PWM 3189, works number 5019 at Highley on the Severn Valley Railway on the 28th of October 2017
Bucarest, Romania • La sclerosi multipla di Christian Bunda è aggressiva e la sua disabilità avanza rapidamente. In questa foto sale su un aereo diretto in Serbia per recarsi in una Spa specializzata in SM. Appena il giorno prima il suo neurologo aveva confermato che la risonanza magnetica mostrava più lesioni del previsto.
Cristian is helped by airport service to carry up him to the plane from Cluj to Bucharest.
Credit: Fernando Moleres
Adafruit: Digital Addressable RGB LED w/ PWM waterproof flexi strip - (1m), ID: 306
Initially I had a problem making this strip work. I programmed the Arduino Mega, wired everything then connected power. I was using the supplied connector already soldered on to the strip. On a few resets I had some LEDs lit but nothing changed the sample program did not work. I couldn’t work out where I was going wrong. My first thoughts centred around a lack of power.
I then checked the other end of the strip without a connector and noticed the screen printed white text labels. DI and CI for Data In and Clock In. I’d been using the wrong end, I had been connecting to DO and CO for Data Out and Clock Out. In my defence the labels at the other end were obscured by the rubber housing. It was an easy fix after soldering on some wires it worked first go. Very cool.
Gracias a todos por vuestros comentarios y reconocimientos...
Por favor, no use esta imagen en los sitios web, blogs u otros medios de comunicación sin mi permiso explícito - Todos los derechos reservados ©.
Please don't use this image on websites, blogs or other media without my explicit permission - All Rights Reserved ©.
Parigi, Francia, • Colpire il centro del bersaglio può essere lo scopo finale, ma Armelle Bugand trova nel tiro con l’arco quello che altre persone con SM cercano nello yoga o nel Qi Gong. Prima di lasciar partire una freccia, deve raggiungere il momento zen in cui concentra tutte le sue energie su un solo bersaglio. Questa disciplina mentale è importante per mantenere un atteggiamento filosofico in cui la mente prevale sul corpo, ed è fondamentale, quindi, per convivere con la SM.
Armelle Bugand is about to shoot one of her arrows.
Credit: Lurdes R. Basolì