Entwurf Schaltplan einfache PCB zum Testen/ Simple PCB for testing

[Starsurfer78]

Moin,
ich langweile mich zur Zeit, da ich auf meine PCB warte und wollte mich in der Zwischenzeit ein wenig in Kicad einarbeiten.
Es soll irgendwann mal eine einfache PCB werden, die nur das nötigste Enthält und die ich vielleicht zum Testen und spielen benutzen kann.
Wenn die mal kaputtgeht, tut das nicht so weh

Aber da ich eigentlich keine Ahnung davon habe, wäre es super, wenn sich Leute mit Ahnung mal den Schaltplan ansehen könnten.

Die PCB soll nur mit dem DUE und den Brushless Board Adapter benutzt werden.

Würde mich über Tipps und Verbesserungsvorschläge freuen.

 

[bernard]

Moin,
ich langweile mich zur Zeit, da ich auf meine PCB warte und wollte mich in der Zwischenzeit ein wenig in Kicad einarbeiten.
Es soll irgendwann mal eine einfache PCB werden, die nur das nötigste Enthält und die ich vielleicht zum Testen und spielen benutzen kann.
Wenn die mal kaputtgeht, tut das nicht so weh

Aber da ich eigentlich keine Ahnung davon habe, wäre es super, wenn sich Leute mit Ahnung mal den Schaltplan ansehen könnten.

Die PCB soll nur mit dem DUE und den Brushless Board Adapter benutzt werden.

Würde mich über Tipps und Verbesserungsvorschläge freuen.

Here my suggestion:

my ArduMower, we call him Rüdiger ;-)

Was ich noch vergessen habe, der Encoder Teiler sollte überbrückbar sein. Aktuell hat man immer eine Teilung von 1/2 oder mehr. Ein Schaltplan von deinem Board wäre ebenfalls hilfreich.

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Can you share your kicad file ?

 

[Starsurfer78]

Yes when i am Back in PC. I think half an hour.
But the PCB isnt Router yet

 

[Starsurfer78]

Here you are

 

[bernard]

Thanks I take a look, And i am new in kicad.
Here only suggestion :

I suppose you want to use external power supply ,i suggest add 3 DC/DC voltage on PCB like in PCB1.2 for 9V,5V 3.3V .Or if DUE can provide 3.3 and 5V on 3 sonars and IMU only the 9V is OK
Relay for battery charging is needed like in PCB1.3 ???
For Motor driver you say brushless motor and certainly it's good, so only connector on PCB for PWM,DIR and optional sense and do not use MC33926.

If possible We need to have possibily to manage 4 drive motor and 2 MOW motor (with only PWM pin ,no need the Dir one)

 

[Starsurfer78]

To keep the board small, there will be an extra board for power and charging.
I have the brushless adapter board and the new Brushless Motor Driver, so I put the 2 MCP on it to use it.
But perhaps is possible to change them, so the Brushless Motor Driver can used without the Adapter Board.

At first i'm not sure if the Sensors all work fine with 3,3v.
Odometrie used 5v if i know right.

 

[Starsurfer78]

The MC Motordriver are not needed there are only as Placeholder in the Schematic

 

[bernard]

To keep the board small, there will be an extra board for power and charging.

OK.

But perhaps is possible to change them, so the Brushless Motor Driver can used without the Adapter Board.

Yes only connector on PCB to connect any kind of driver.

At first i'm not sure if the Sensors all work fine with 3,3v.

Yes and certainly need DC converter on some pin like odometry or sonar

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[Starsurfer78]

Did the Perimeter Receiver work with 3.3V or only with 5V?
Google gives different results.

Did the Odometrie work with Voltage divider as i have done it for Sonar Trigger?

 

[bernard]

Did the Odometrie work with Voltage divider as i have done it for Sonar Trigger?

I think YES It's numeric signal, so it's cool to add 2 shut down resistor exactly like you did for Sonar.

Did the Perimeter Receiver work with 3.3V or only with 5V?

Here it's more complex and only test can show the correct working mode

 

[Starsurfer78]

Thanks for replay.
Let's see if I can do this

 

[bernard]

I have made many test in the past .but never with module powered at 3.3V .
Here the scope result with 5V powered receiver.
You can see the output from 0.8 to 4.5 Volt , so need a voltage divisor.

I build a receiver based on ESP32 and use 2 resistors 1K and 1.5K to reduce voltage.

I always have the circuit and try to connect it again to remember how it's work.

 

[Starsurfer78]

Ok that would be nice.
At the moment i have 1k and 2k Resistors in Schematic

 

[bernard]

For all numeric signal 1K and 2K are perfect.
But for receiver it's better to use the full range ,so 1K and 1.5K give 3.33V.

For buzzer maybe it's possible to avoid BC817 and use directly a 3.3V buzzer that you can locate everywhere in the chassis.

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[Starsurfer78]

Ok thanks.
I have removed the BC817, the Buzzer should work with 3.3V, but its more noisy.

 

[Starsurfer78]

New Schematic PDF, still at work

 

[Starsurfer78]

hm ok at least looks similar to a circuit board

 

[Starsurfer78]

New Schematic.
Now with MC33926 Connectors and 2x4 Pins Molex for the New Brushless Driver or as universal Connectors for other Driver.
Did not know if this all work right, but when it is ready, i will test it

 

[Starsurfer78]

Here is a Image from the PCB with Size circa 16,8x9,6 cm.
The KiCad Files are now on Github

 

[Starsurfer78]

Charging and Power Schematic