Variable Frequency Drive for a larger factory fan

**Christophe Mineau** · Jul 31, 2020, 04:40 AM

Just wanted to say as others above : Great work !
Yes, for the command and monitor part, I think you can improve things, but this is really details compared to the impressive work.
I am especially impressed by the power unit part, this is something that keeps to intimidate me.
I'm curious if you have made an account of the total cost of your solution ?

**chy_farm** · Jul 31, 2020, 06:40 AM

Originally Posted by Christophe Mineau

----
I'm curious if you have made an account of the total cost of your solution ?

Thanks Christophe,
Well,,, my answer should be NO,
this is a sort of art work to me, so I do not mind too much about the balance sheet, in other words I get something 'Price Less' out of it, lol.

**trigger** · Jul 31, 2020, 07:17 AM

Interesting view on scope ,my comment was due to my own small project building a tracer ,had issues with noise on the scope till I changed the build over to PCB,and proper BNC plugs.
I am certainly not up to your level of tinkering but enjoy the improvement to the welder and the current project keep em coming

**chy_farm** · Jul 31, 2020, 07:55 AM

Originally Posted by trigger

Interesting view on scope ,my comment was due to my own small project building a tracer ,had issues with noise on the scope till I changed the build over to PCB,and proper BNC plugs.
--- enjoy the improvement to the welder and the current project keep em coming

Thanks Trigger,
Yes I can get what you have on your oscilloscope. Noises on oscilloscopes are real issue to us. Several years ago I was very fortunate to bump into a guy who wanted to sell an active probe made by Tektronix, was almost new!
This active probe solved 1/3 of my issues given by this kind of noises.

Thanks again, am glad you like this.

Chy

**nova_robotics** · Jul 31, 2020, 10:59 AM

Originally Posted by chy_farm

Nova, thank you very much for your kindness.
This information is very big for me, for years I have been learning C, but not yet graduate from a first grade though, lol.
When I got to know Arduino, was a bit disappointed that it uses C++, which uses 'Class', this makes me mixed up and still I am loosing my way to restart learning.

So this offer is very great to me! Perhaps you make me stand again and start again Nova. Will try posting the code and ask you for your information.
Many thanks!!

Chy

Oh you don't have to. You can use plain dirty old C to program an Arduino. You don't need to use classes at all.

**chy_farm** · Jul 31, 2020, 05:07 PM

Originally Posted by nova_robotics

Oh you don't have to. You can use plain dirty old C to program an Arduino. You don't need to use classes at all.

Good morning Nova, thanks. This makes me feel a lot more easy about C.
Chy

**chy_farm** · Aug 3, 2020, 08:01 AM

Originally Posted by trigger

Interesting view on scope ,my comment was due to my own small project building a tracer ,had issues with noise on the scope till I changed the build over to PCB,and proper BNC plugs.
I am certainly not up to your level of tinkering but enjoy the improvement to the welder and the current project keep em coming

Hi Trigger, as far the “noiseless” active prove for an oscilloscope, today I shot a pic of it. Posting it here for you.