perimetric sender with VNH2SP30

[ynothar]

Hello everyone !

For my personal use, i'm building my own arduinomower. I need your point of view about this :

For the perimeter wire sender, I'd like to use VNH2SP30 circuit instead of MC33926 ( I have got stock of it ). You can find information about it right here : https://www.sparkfun.com/products/10182
Tell me what do you think about it. If you have some advices, I am opened.

Thaks !

 

[jack0]

Hello

It should works although it is rather expensive ( 70 $ on the link you provide). But if you already have it ...

You can find a lot of advices and explanations on the wiki concerning the perimeter wire.

I (only) use a L298N H bridge with a 300 m perimeter, ( 9 V, 0.5 A average, 1 A peak ) and I get a good signal, as shown by the web oscilloscope from the wiki and a simple 150mH coil (from the shop).

This is also an easy way to test your own module.

Greets
Jacques
Attachment: https://forum.ardumower.de/data/media/kunena/attachments/2809/WebOsci.jpg/

 

[markus-lbon-facebook]

Hello

.. although it is rather expensive ( 70 $ on the link you provide). ..

Oh yeah
cheaper
https://www.marotronics.de/Monster-Motor-Shield-Dual-Treiber-30A-VNH2SP30-Full-Bridge

 

[ynothar]

Hello Jacques, what represents your scope graph ?

I have done with the schematic of my card.

Could you tell me if you see something wrong ?

Thanks ! Bye !
Attachment: https://forum.ardumower.de/data/media/kunena/attachments/2886/PrintingImpressionSchmatique.pdf/

 

[jack0]

Hello

The scope graph is exactly what is described in the wiki (http://wiki.ardumower.de/index.php?title=Perimeter_wire) § "Test sender with your PC's sound card", obtained with a coil plugged in the microphon input of a eeepc.

I'm not a specialist of electronic but I just wonder what is the EN/DIAG pin on your driver ? input or output ? Enable or driver fault ?

Jacques

 

[ynothar]

Ok for the graph. So if I have well undertood, it's an easy way to verify the perimetric sender.

On my schematic, EN/DIAG is a bidir pin with a pull-up on the break board. For the input part ( from arduino to bridge chip ), it's used to enable the chip ( if the arduino pin is configured as input, it's not driven so the pull-up do the job of enabling ). For the output part ( from bridge chip to arduino ), it's the fault output. 1 is everything OK, 0 when a fault occured. It looks like the MC33926 SF pin if i'm not wrong.

Have a good day !