Search found 13 matches

If relatively low timing accuracy for your 1 second tick is acceptable,
you might set the WDT for 576mS, then on WDT Wake, run a timer to
wait out the required ~424 mS.

I believe there are still ...

You can use a diode bridge for automatic polarity selection, with a few caveats. Connect the DC input to the "AC - AC" terminals of the bridge, the "+" bridge terminal to your circuit's + input and th ...

Eugeneo,

For normal PWM frequencies of <20KHz, the PWM module of the PIC works well; You can specify PWM duty cycle directly. Or the PIC can output a single pulse by using the "delay" function. ...

I just went through the design loop for a 500V 1A high-speed high-side FET switch....similar application. I agree that using an Opto Isolator won't work. Gate drive voltage and current are critical. B ...

You're probably running into simple syntax issues....usually
the hardest things to spot with a new compiler.

For instance, to check Port pin B1, you need an explicit input call;
ie, "if ( input( ...

if ( input(PIN_B4) == 1 ) /*Start Sequencing on B4 hi*/
{
.
.
.
}

Cheers!

Over the years, we've found a few crystals of all style/manufacturer which were defective, and showed an inability to start oscillating reliably. Others would stop oscillating for no apparent reason. ...

Yes, use a "piezo transducer", not a "piezo buzzer". Do not drive
with more than about 12V p-p, or it may be damaged. See the
data sheet for maximum voltage; it is usually fairly low.

Try to mou ...

Please repost your code using the "Code" button;
it makes it much easier to follow.

Including all code - Includes, Fuses, Devices etc,
as well as variable declarations and non-included isr's.

...

If you are using Port B pins, add NOLVP to the "fuses" list.
Otherwise, activity on programming pins will cause trouble.

Many motors show acoustic resonances in the audible range. These are very hard to PWM without whining. A higher PWM frequency can help, as can bad hearing....

As Ttelmah noted, the 4426 series driv ...

Sorry for not logging in on my last post (Guest, as foothill).

Neil, there's a fairly direct way I've used to sense a reasonably stable zero-crossing reference:

I used a "back-to-back" emitter t ...

I'm having trouble "Sleeping". What should be a timer that wakes every 2304ms to produce a 10ms pulse is acting like a free-running mutivibrator. What I see at power-on is an immediate 10ms high foll ...