Post Created date
Stepper Motor Help
RickB wrote: kpierson:   Is there any chance you have chosen a pwm freq that is to high for the l/r time constant of the steppers? The current may not be reaching the level...
Wednesday, 19 November 2014 - 15:09
Stepper Motor Help
you are correct, sorry about that.  I must have added a 0 to the calculation!  I wanted to make sure I had the PPS listed and didn't even stop to think if the number I...
Tuesday, 18 November 2014 - 04:35
Stepper Motor Help
When pumping water or running it dry I have no problems getting it to 400 rpm.  If acceleration is an issue would it be magnified by the viscous liquid?   As far as my...
Tuesday, 18 November 2014 - 00:31
Stepper Motor Help
The pumps and stepper motor came as a package.  The manufacturer claimed I would be able to hit my goal of 300rpm with the viscosity I am working with.  I have been in...
Monday, 17 November 2014 - 21:55
Intermittent USART Issue - ATTiny2313a
ka7ehk wrote:If the string after the 'K' is static, is it a PROGMEM string? How do you step through the string after the K (Pointer or array index)?) Can you put a test for...
Tuesday, 6 September 2011 - 06:07
Intermittent USART Issue - ATTiny2313a
Plons wrote:I would add 100nF at the input of the 7805, add 10uF to the output as well. And a reversd bias diode from input (K) and output (A). It looks as if the AVR isn't...
Tuesday, 6 September 2011 - 00:47
Intermittent USART Issue - ATTiny2313a
As I said, the power supply is based around a 7805. There is a 10uf electrolytic cap on the input pin and a 0.1uf ceramic cap on the output. There are 0.1uf decoupling caps for...
Monday, 5 September 2011 - 22:14
Intermittent USART Issue - ATTiny2313a
I'm running the board off of a 12vdc plug in transformer. The transformer feeds a 7805 and voltage is remaining constant under all conditions. I have the BOD set at 4.3vdc.
Monday, 5 September 2011 - 21:55
TechFX reflow controller
jvn wrote:kpierson wrote:I ended up finding someone who sent me the latest version of the software and it seems to work (haven't actually made boards yet, but i have controlled...
Friday, 24 June 2011 - 11:54
TechFX reflow controller
ksvitale wrote:Hi folks: ... Peace, Scott Wow, that's crazy. I've always thought they seemed a little "out there" with the way the present their company on forums and what not so...
Friday, 27 May 2011 - 21:52
TechFX reflow controller
I ended up finding someone who sent me the latest version of the software and it seems to work (haven't actually made boards yet, but i have controlled the oven). If anyone needs...
Wednesday, 11 May 2011 - 22:15
TRIAC CONTROL - Calculating the Milliseconds
I've done several phase angle projects and have learned the hard way that timing is extremely critical to get a stable system. I typically have my systems measure the actual...
Tuesday, 10 May 2011 - 15:27