DarkPaw power connections

1572477545

Hi, guys, congratulations on a great robot.

The RPi has a micro-USB jack that can be used for a 5V power input supply (I have 3A).

But the batteries are 7.4v.

There is also the switch hidden on the Hat.  And another micro-USB jack beside the switch.

1)  If I plug a 5V power supply directly into the RPi through its micro-USB, will it hurt anything in the following cases:
  a)  batteries are in and switch is OFF (low)
  b)  batteries are in and switch is ON (high)
  c)  batteries are NOT in, switch is either ON or OFF?

2)  It looks like the switch switches between the batteries as a power supply (ON), and the micro-USB jack on the Hat as a power supply.  
Is this right?
Can I test out the robot using a 5V 3A power supply going into the Hat?  Will 3A be enough power to run the motors, or at least test them?

3)  How does the Hat feed power to the RPi?  Is there a step-down transformer, diodes, or just a straight wires connection?
Will the RPi run well on 7.4V?  Anything to watch out for in hooking up power in various configurations?

4)  What are the software routines to calibrate the legs?

thanks very much for any advice you might be able to give.

1578178056

as usual Adeept refuses to  answer question or offer useful help for the Darkpaw robot.

TangoCash

I just builded a DarkPaw.

If you use external power supply, use the micro usb port next to the power switch.
If batteries are in, the switch must be in off state. (towards the micro-usb port is off)

If no batteries were in, the switch doesnt matter.

the robot hat has a DC-DC power Converter (GS2678), so only 5v come to the rpi.

calibration of the servos has to be made while installing them, like they describe in the manual

1587585066

TangoCash replied at 2020-4-7 06:16 PM
I just builded a DarkPaw.

If you use external power supply, use the micro usb port next to the powe ...

sir can you please tell me which batteries you used, I got couple of 18650s, unfortunately, some were 5000mah protected so they didn't work, I would be  happy if I can get  URL make and model of battery

TangoCash

I bought them in eBay, EAN 4250558668733, named "Sony Akku US18650 VTC6 3120mAh 3,7V 30A"