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Bipolar Stepper Motor: Current Limit or Not!
My project is a success! I used KiCad tools for the PCB and OshPark to fab my board. Here is a photo of the finished, populated board running my software and the bare board...
Wednesday, 11 April 2018 - 11:09
Trying to start debug session
clawson wrote: Sorry I thought it was 328P not 328PB, that's a new chip so maybe the datasheet content is different?   The fact is that it has to use ISP to enable the DWEN...
Saturday, 7 April 2018 - 12:27
Trying to start debug session
clawson wrote: It asked you "Do you want to use SPI to enabled dW? ". What did you answer? Hope it was "yes" as it needs to use ISP to enable the DWEN fuse. Also clear the RESET...
Saturday, 7 April 2018 - 12:03
Bipolar Stepper Motor: Current Limit or Not!
Ok, here's my updated schematics. Please give it a quick review for obvious errors. THANKS!
Wednesday, 7 March 2018 - 12:12
Bipolar Stepper Motor: Current Limit or Not!
I wrote some basic code in AS and realized I need to use two 16-bit timers for better resolution. So, I'm switching to an ATMEGA328PB part instead.   I'm not sure if this is...
Tuesday, 6 March 2018 - 13:11
Bipolar Stepper Motor: Current Limit or Not!
Paulvdh,   Thanks for the detailed explanation. I have a 3 position header for the DECAY pin so I can set it to any mode. So, I can try all three, I'm thinking SLOW may be...
Sunday, 4 March 2018 - 10:26
Bipolar Stepper Motor: Current Limit or Not!
Ok, I added another 0.1uF decoupling cap. I disconnected AREF from +5V and added a 0.1uF cap to ground.   I've read the description of the different decays modes, but I'...
Saturday, 3 March 2018 - 11:30
Bipolar Stepper Motor: Current Limit or Not!
Well, I've completed my preliminary design. If I may impose, can someone do a quick check on this to see if I missed anything obvious? Thanks! Also, what is the difference between...
Saturday, 3 March 2018 - 01:27
Bipolar Stepper Motor: Current Limit or Not!
Paulvdh, thanks. I'll check them out.   But, looking at the DRV8825 IC, it seems to do what you're saying. It has a 1/32 mode that drives the 2 coils with a sine wave to get...
Tuesday, 20 February 2018 - 19:39
Bipolar Stepper Motor: Current Limit or Not!
Wow! Thanks for all the responses.   Kartman, the DRV8825 looks like a much better alternative to the L298. Thanks for the suggestion. I'll look at it in much more detail....
Tuesday, 20 February 2018 - 13:15
Bipolar Stepper Motor: Current Limit or Not!
Thanks. That makes sense. So, I'll look to run the motor at a higher voltage and current limit it.    Of course, for my application speed is not important. I plan on...
Monday, 19 February 2018 - 22:12
Anyone using KICAD for their designs?
Kartman wrote:devils4ever - it doesn't look like you've got much creepage distance in the transformer area. You need to separate the mains voltages from the low voltages - if I'm...
Wednesday, 17 August 2011 - 13:51

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