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Auf dem Weg zu ersten Pause, direkt am Parks, da war ein Anpflanzung von einigen Gruppen dieser Krokusse.
Für diesen Effekt habe ich den Kontrast ziemlich hoch gedreht, dadurch ist der Hintergrund deutlich dunkler geworden, und die Farbe der Krokusse kommt besser zur Geltung
The big gaps between "on" pulses allow multiple servos to be controlled over a single data link (eg a radio control signal.) Only one servo is "on" at any one time. With a 25ms frame and a 2.5ms max on-time, you can theoretically get 10 channels on each signal path. (In this drawing, 3ms are allocated to each servo, and I only drew 5.)
What to do if you favourite microcontroller doesn't have enough hardware PWM pins? Software driven PWM of course.
There many absolutely dumb ways to do it, and I've probably tested all of these. They can be classified as "brute force".
A better way of doing it is to only do any work if there is anything to do. But you already know all of this of course. Calculate when to toggle the lines and let a timer do all of the work. Code can be found on my blog
British Rail departmental diesel loco PWM 650 / 97650 at Ludborough, Lincolnshire Wolds Railway. Sunday 19 August 2012.
Photograph copyright: Ian 10B.
Camera: Canon EOS 550D.
L-R VH-PWM of Rebel Air and VH-MIN and VH-UPQ of Setair, which flew a load of people up from Melbourne.
About two years later both MIN and UPQ would be wearing Rebel Air colours also, before finishing their careers flying for Dakota National Air out of Bankstown in Sydney.
PWM was later sold to a New Zealand company.
For a comprehensive history of PWM click here .
For a comprehensive history of MIN click here .
Equipped with sophisticated Enhanced Capture/Compare/PWM (ECCP) peripheral the Microchip PIC18F14K50 microcontroller could produce up to four PWM channel outputs. The enhanced PWM (Pulse Width Modulation) mode in ECCP peripheral is capable to drive the full bridge DC Motor circuit directly both in forward or reverse direction. It also could generate single PWM output on the selectable PIC18F14K50 pins when it configured in pulse steering mode. For more information you could visit www.ermicro.com/blog/?p=1461
Would be interesting if we could make our microcontroller to sing for us not just beeping or blinking; this project is all about using the powerful AVR ATmega168 16-bit PWM feature to produce accurate musical notes such as playing the child’s favorite Twinkle-Twinkle Little Star song or we could say beeping with style. For more information please visit www.ermicro.com/blog/?p=580
Dimmer circuit built without a circuit board. I laid it out with some wires crossing, and made sure they didn't touch when I soldered it all together.
Having the board layout printed 1:1 made it easy to cut and bend wires before I put anything together.
PWM at Mangalore Airport in Victoria. At the 1983 SAAA Fly In and airshow during the Easter Weekend. We flew down from Sydney for the day on Easter Sunday, 4 hours each way on this wonderful old girl.
For a comprehensive history of this aircraft click here .
int ledPin = 13; // LED connected to digital pin 13int h=1;
int h = 1;
int h2=0;
int h3=0;
int h4=0;
int h5=0;
int h6=0; // direction memory motor 1
int h7=0; // direction memory motor 2
void setup() // run once, when the sketch starts
{
pinMode(4, OUTPUT); // pwm motor 1
pinMode(6, OUTPUT); // pwm motor 2
pinMode(5, OUTPUT); // direction motor 1
pinMode(7, OUTPUT); // direction motor 2
pinMode(13, OUTPUT); // PWM INDICATOR LED
pinMode(2, INPUT); // direction motor 1 - input test switch
pinMode(3, INPUT); // direction motor 2 - input test switch
digitalWrite(4, LOW); // motor 1 off
digitalWrite(6, LOW); // motor 2 off
digitalWrite(5, LOW); // motor 1 direction L - low
digitalWrite(7, LOW); // motor 2 direction L - low
}
void loop() // run over and over again
{
h5 = digitalRead(2); // motor 1 direction
if (h5!=h6)
{
h6=h5;
digitalWrite(4, LOW); // motor 1 pwm low - stop
delay(1000);
digitalWrite(5, h5); //
delay(1000);
}
h5 = digitalRead(3); // motor 2 direction
if (h5!=h7)
{
h7=h5;
digitalWrite(6, LOW); // motor 2 pwm low - stop
delay(1000);
digitalWrite(7, h5); //
delay(1000);
}
digitalWrite(4, HIGH); // motor 1 2 pwm high
digitalWrite(6, HIGH); //
digitalWrite(13, HIGH); //
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(4, LOW); // motor 1 2 pwm low
digitalWrite(6, LOW); //
digitalWrite(13, LOW); //
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--;
}
}
PWM through a capacitor has the same frequency and average voltage, but is closer to a constant analog voltage.
A Ruston & Hornsby diesel electric in permanent way service at Taunton. Built at Lincoln in 1959 she was scrapped in 1990. British rail purchased five of these locomotives for permanent way service, their single traction motor could be disengaged for towing, which allowed them to be towed at higher speeds in trains to work sites.
Puente-H con transistores NPN y PNP, controlado por PWM generado por un 555. Los transistores pueden ser TIP u otro tipo, según la potencia necesitada para el motor.
Más información en:
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 ©.
First successful test of an improvement to the PWM synthesis code that allows user-defined envelope shapes. This one is a computed exponential decay, similar to a stringed instrument being plucked. The resolution is only 8 bits, but the result looks OK.
PWM at Mangalore Airport in Victoria. At the 1983 SAAA Fly In and airshow during the Easter Weekend. We flew down from Sydney for the day on Easter Sunday, 4 hours each way, on this wonderful old girl.
For a comprehensive history of this aircraft click here .
44ks audio output at 9.5 bits resolution... Quality seems to be limited by static on the input ADC pins for now.
A Ruston & Hornsby diesel electric in permanent way service at Taunton. Built at Lincoln in 1959 she was scrapped in 1990. British rail purchased five of these locomotives for permanent way service, their single traction motor could be disengaged for towing, which allowed them to be towed at higher speeds in trains to work sites.
Camera: SONY A6000
Panorama Y Axis: 3 Images
Panorama X Axis: 5 Images
ISO: 100
Shutter Speed: 1/3"
Light Source: Internal Lamp
DIC: Yes
Microscope Objective: 10X
Stitching Software: PTGui
Other Software: Photoshop for hot-pixel removal. GIMP for cropping and scaling.
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