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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
No problem Giorgos and thanks for the reply.
6
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. 
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