I'm trying to build a pcb for an L298 and I need your suggestions and help again :)
I want to drive a single DC Motor with this driver using PWM from an Atmega8.
Here is the schematic which I want to improve:
Just ignore the "1N5908" diode, I will be using 1N5822 instead.
While I was looking at the datasheet( http://www.st.com/stonline/books... ) I found at page 7, some suggestions and as I have no electronics background I don't quite understand what the following means:
A non inductive capacitor, usually of 100 nF, must
be foreseen between both Vs and Vss, to ground,
as near as possible to GND pin. When the large capacitor
of the power supply is too far from the IC, a
second smaller one must be foreseen near the
The sense resistor, not of a wire wound type, must
be grounded near the negative pole of Vs that must
be near the GND pin of the I.C.
Do I have to put two non inductive capacitors, one between Vs and GND, and one between VCC and GND ?
Sense resistor? What's the deal with it? I've google'd and found some schematics using L298 IC and two I've found had a direct connection between SENSA,SENSB and GND. Where is the resistor?
Another thing I don't quite understand, one schematic had a resistor wired to the E1, and E2, then to the control pins from the Atmega. Why is that?