Search found 12 matches

All descriptors are in a driver file, e.g. usb_desc_cdc.h for CDC, which needs to be personalized. You would want to study thorougly how string lengths are coded before changing strings.

Thank you ...

Hello Dear All,

I would like to design a usb hardware with a 18F4550 and I wonder how can I set usb hardware parameters like PSD(Product String Descriptor), MSD(Manufacturer String Descriptor) etc. ...

Thank you very much Ttelmah!

Step angle of the motor is 1.8 degree.
Dear Ttelmah, would you please clarify your last post? Do you think that, my problem is with my code? So, how can I fix the problem?

Thank you for the answer Ttelmah.

But, this motor runs very slowly (approximately 50-60 rpm), I can not believe that this is the speed limit of a unipolar stepper motor?

I have just checked the circuit with a oscilloscope. It works fine at high and low speed.

Thank you for your answer temtronic.

Here is some details of the motor:

3A, 1,66ohm, 7.5mH, nema 24, unipolar. Unfortunately I don't have any more details.

I did some research on the internet ...

Hello Dear All,

I have a unipolar 5V stepper motor and I want to drive it with a 16f877a.
I have connected 2 pieces of tc4427 mosfet drivers and 4 pieces of IRF2807 to the pic and, as I see they a ...

Ok.

In the code:
Change oscillator to XT for the 4MHz crystal.

Dear Ttelmah, thanks for your help. It worked for 4Mhz crystal. However, HS or XT did not work for 20Mhz crystal.

Dear PCM pro ...

Thanks for your reply Ttelmah.

1. I have a 330 ohm resistor between the pic and the led.
2. I try the circuit on a breadboard. I am sure that connections are ok. I checked them with a multimeter. ...

Hello Dear All,

I had some problems with 16f877a, therefore, I decided to try a simple led blink demo on it.

Unfortunately, the led does not blink or blinks very quickly. I tried some different ...

Hello All,

I have a problem with RA3(MCLR) pin on 16f690. I want to use that pin as a output line. Therefore, I put that line into the header file:
#FUSES NOMCLR //Master Clear p ...