Recent Posts

1

Your projects / Re: Step motor driver

« Last post by kam on June 17, 2017, 10:33:32 AM »

Sorry but cannot understand. I think that you mean that if you try to rotate fast the stepper stops. This is normal. Steppers have a maximum RPM that you may exceed.

2

Your projects / PC fan ok/failure indicator circuit

« Last post by fog2y on June 16, 2017, 23:59:02 PM »

Hello,

I am currently workin on a fan ok/failure led indicator.
I have a circuit finished and tested, but i would like to know some suggestions on improving the circuit from someone who is more educated in the DC circuits design than I am - It is just my hobby, I work as an automotive quality technician:)

The circuit follows.

Thanx for your replies

3

General Discussion / Re: PCB Glossary and PCB Prototype

« Last post by sorvillo on June 16, 2017, 06:25:49 AM »

very valuable information for me. Thanks a lot!

4

Your projects / Step motor driver

« Last post by johniee on May 17, 2017, 22:07:54 PM »

Good evening!!!
In a application with a step motor i observe that some times the step motor stop moving. In a cycling programm the movment some times the step motor does not execute!! I observe that if i increase the pulses resolution of step driver the problem is eliminate, but if i increase the speed pulses/ sec  the broblem appears again. The load is small.
Thanks in advance!!
Kisses from peristeri attikis!

5

General Discussion / Re: Which DC controller from pcbheaven projects should i choose ?

« Last post by Nocs on May 08, 2017, 08:03:53 AM »

No problem Giorgos and thanks for the reply.

6

General Discussion / Re: Which DC controller from pcbheaven projects should i choose ?

« Last post by kam on May 07, 2017, 10:34:20 AM »

hard disc drives are totally different and cannot be controlled by these circuits. Sorry.

7

Your projects / Re: overheating Circuit

« Last post by Soldertraining on May 05, 2017, 16:53:55 PM »

The circuit is overheated mainly due to a loose connection. There may have other reasons also like an excessive current, poor connections, and insulation breakdown.

8

General Discussion / Outrunner Stepper

« Last post by aliaykan on April 26, 2017, 21:25:20 PM »

Hi,

I searched but couldn't find any sample of outrunner stepper motor. Is it possible make an outrunner stepper motor like outrunner BLDC?

Thanks,

9

Your projects / Re: Closed Loop high frequency PWM PC Fan Controller

« Last post by kam on April 20, 2017, 08:29:22 AM »

I do not use interrupts, that is why you see no RETFIE.
When compiling, do you get any error messages?
Also, make sure that the configuration word is active:
__config _BOR_ON & _IOSCFS_8MHZ & _CP_OFF & _MCLRE_ON & _PWRTE_OFF & _WDT_OFF & _INTOSCIO

Or let MPLAB set the configuration as per the above line.

10

Your projects / Re: Closed Loop high frequency PWM PC Fan Controller

« Last post by oachalon on April 14, 2017, 05:55:48 AM »

Hi,

My skills are introductory.  I understand what you are trying to provide, and i built your circuit exactly, but nothing worked.

Do you by chance have a version that works with a PIC16F series? 

In the Init you are clearing the interrupt, but i dont actually see your interrupt routine and i dont see any RETFIE when you leave the interrupt.  Its difficult for me to see exactly what is going on.