Umbau Worx Landroid WG795e Type 1

Nicht ganz richtig, aber er braucht 2x PWM für vorwärts/rückwarts

Code: 
/*BTS7960 Motor Driver Carrier*/
//const int MotorRight_R_EN = 8;    (VCC) to Arduino 5V pin
//const int MotorRight_L_EN = 9;    (VCC) to Arduino 5V pin
const int pinMotorRight_forward = 2;   //(RPWM) to Arduino pin 2(PWM)
const int pinMotorRight_reverse = 3;   //(LPWM) to Arduino pin 3(PWM)

Aber ok, ich suche mal weiter.

Wenn ich deinen Schaltplan richtig interpretiere, dann ist der orange Anschluss ein Ausgang?

AnschlussBG3612.jpg
 
R_EN und L_EN können direkt an 5V beim BTS angeschlossen werden, dafür braucht man keine extra Pins, aber halt zwei PWM Pins
 
Looks ok to me for now.
I can see Battery Switch, but not Charging Switch, is that intentional?
 
EinEinfach said:
So I think I'm nearly complete with my PCB design. If someone wanna review it, it will be great.
KicadFiles
Click to expand...
Cool ..

Check the footprint of the DC/DC stepdown to use a minimum 3A one and not a simple LM2596 (XL4005 for example)
If possible increase the width of the trace between J26 and PI4 and add a jumper or fuse to adjust 5V on DC/DC before powering the PCB by 5V.
I suppose J9/J10 etc ..... are for level shifter (Did you test this connecting :Signal is reverse) and did they work with red BL motor driver ZSX11H odometry pin (My own test fail !!!!) ??

I don't know how pico work, but on teensy it's better and faster to connect PI/Teensy over USB than using Serial, it's certainly also more easy to flash pico from Pi over USB .

Where did you connect the RTK GPS ?
Why level shifter between IMU and PI ? GY521 is 3.3V module
Why level shifter also to Power PCB I2C line ?

And last remark DC/DC generate a lot of EMF noise , so I2C line and IMU as far as possible from it
 
Last edited:
Bernard said:
Check the footprint of the DC/DC stepdown to use a minimum 3A one and not a simple LM2596 (XL4005 for example)
Click to expand...
Ok thanks, will doublecheck footprint
Bernard said:
If possible increase the width of the trace between J26 and PI4 and add a jumper or fuse to adjust 5V on DC/DC before powering the PCB by 5V.
Click to expand...
Yes make sense
Bernard said:
I suppose J9/J10 etc ..... are for level shifter (Did you test this connecting :Signal is reverse) and did they work with red BL motor driver ZSX11H odometry pin (My own test fail !!!!) ??
Click to expand...
Yes it works well on my test build. But I didn't perform long term tests. What is exactly failed in your configuration?
Bernard said:
I don't know how pico work, but on teensy it's better and faster to connect PI/Teensy over USB than using Serial, it's certainly also more easy to flash pico from Pi over USB .
Click to expand...
Indeed, it will be better, but I didn't find out how to speak to pico over usb in micropython. Maybe USB_VCP could be a way. For flashing actions the usb cable can stay connected inside the rover
Bernard said:
Where did you connect the RTK GPS ?
Click to expand...
Ardusimple Board will be connected via USB to RPI4

Bernard said:
Why level shifter between IMU and PI ? GY521 is 3.3V module
Click to expand...
There is no level shifter, don't know what you mean
Bernard said:
Why level shifter also to Power PCB I2C line ?
Click to expand...
Hiere is also no level shifter, don't know what you mean
Bernard said:
And last remark DC/DC generate a lot of EMF noise , so I2C line and IMU as far as possible from it
Click to expand...
Can try to get more place
 
There is no level shifter, don't know what you mean
Click to expand...
Sorry i have thought that J24/J25 and J14/J15 are the location of the Level shifter but not at all :ROFLMAO: :ROFLMAO:
Yes it works well on my test build. But I didn't perform long term tests. What is exactly failed in your configuration?
Click to expand...
It was 2 years ago a very fast test,so i don't remember exactly , and finally it was all OK at 3.3V from teensy output .
But maybe missing pull-down resistor and i am certainly wrong if it's OK for you in your test.
For example
On low side :
Why R1 on PWM and no on other Pin : Dir and Brake.
On High side :
I also use a 100K on brake pull-down, but no difference if i remove it ,and i use 3.3V
Indeed, it will be better, but I didn't find out how to speak to pico over usb in micropython. Maybe USB_VCP could be a way. For flashing actions the usb cable can stay connected inside the rover
Click to expand...
OK.
Ardusimple Board will be connected via USB to RPI4
Click to expand...
Perfect.
Send us a feedback after long term use, I hope PI4 Usb power output is enought.
Possible make sense to add a 5V pin on J11 just in case , but you need the com PI4/pico over USB .

In all case CONGRATULATION for this build.(y)
 
The Cytron Motordriver arraived, verry small. Same sizes as the ESP32 V1
 

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