Hello,

In the datasheet the Vgs(th) is given as 2.8 Volts @ 1 mA:



Bertus

 

Hello,

In the datasheet the Vgs(th) is given as 2.8 Volts @ 1 mA:

View attachment 167654

Bertus

What I saw was the last line of the table, and that was used for as a switch must see.

 

#10
point 1. No. Your circuit is wrong. Yo cannot switch +12V like that with an NFET. AS you have it, turning the FET on will short the 12V supply.

You need something like this using a PFET..

Point 2. Yes, give it a try. That's about what I said in point 9.

 

Ok i tried D5 directly to the Enable Pin A (un-jumper because I had to remove the jumper in order to fir the cable in. The issue is that the L298N led stays on the whole time since the power line goes directly into the 12V. This means it will be drawing power and draining my battery between each vibration cycle.

 

Have you measured the current? If it is just the LED, easy, remove it.

 

Without the 5V supply to L298N it will not draw any power from 12V input. Why not simply control the 5V supply to L298N with a logic level mosfet.

 

What do you mean? The L298 doesnt get 5V from the Arduino, it gets 9V from an external supply. How should I connect it in your opinion?

 

I am talking about pin 9 (VCC) of L298N. it is supplied with 5V and pin 4 (VS) is supplied with 9 or 12V.

Or why can't you enable or disable th eL298N chip using ENA and ENB pins of L298N ?

You just have to connect th eENx pins of L298N to Nano and make it high to turn ON the motor when reuired and then make it low to disable the L298N outputs. Have you tried this and measured the current drawn by the L298N chip when ENx pins are low ?

 

You just have to connect th eENx pins of L298N to Nano and make it high to turn ON the motor when reuired and then make it low to disable the L298N outputs. Have you tried this and measured the current drawn by the L298N chip when ENx pins are low ?

I've more or less asked just that in post #9 but still got no reply.

 

See this video. Atleast in simulator the VCC pin draws current in uA when ENx pins are low and VS pin circuit doesn't draw any current when ENx pins are low.