pwm prototype

simple pwm circuit: a pic chip drives two LEDs via a simple transistor. the pulse width is about 5.7 milliseconds, so the LED brightness is updated about 175 times a second. the software is 40 assembly instructions, or 299 bytes of machine code.

Category:

Howto & Style

Tags:

• electronics
• blinky
• lights
• pwm
• microcontroller

[willsfca]

this one does 175 pulses per second, which works out to be 10,500 pulses per minute... but it's not for sale. just a little prototype.

[willsfca]

it's a picf84! it's definitely designed with the RGB LEDs in mind. i'm just trying to decide on what sequence to use.

[123asas123]

.. Isn't this way easier to make with an AVR/Arduino?

Take a breadboard, two resistors, two LEDs, some small bridgey cables, ??? (You know what to do, also attach the LEDs to the PWM enabled connectors), write a tiny piece code in Arduino's C/C++ mix in the Arduino IDE, click a button, bang.

Anyways, this is cool, too. :)

[homeshadowpurple]

Cool can you do that @ 10,000-40,000 flash per min and keep it under three volts and I would buy it.Seriously.

[FlyByPC]

Cool. I can't see what kind of chip you're using, but I did something similar with a 16F84A. Try it with one of these three-element R/G/B LEDs. Modulate the red, green, and blue to get whatever color you want. 8-)

[antoniocossio]

that's pretty cool, i was wondering how to do it...

[DreadnoughtBB35]

Hey, that's kinda neat. Thanks willsfca. :-)