[SOLVED]Power system of Crazyflie 2.0

Firmware/software/electronics/mechanics
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song
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Posts: 15
Joined: Tue Jan 29, 2019 12:24 am

[SOLVED]Power system of Crazyflie 2.0

Post by song » Wed Feb 13, 2019 1:36 am

Hi there!

I'm newly getting interested in drones, and I made my own board referring to Crazyflie(using your opened source and schematics) But it doesn't work well.

I use 'CONN_BAT' pin to supply power (3.7V/0.3A) and the result is very interesting.
When i supply power on my board, the voltage value decreases gradually. It goes down to 1.8V
I guess there's something that i don't know about power management(especially in BQ24075)

I already read all your posts especially 'Development board' on your homepage. I checked everything I can to find whether there's any fault on my B'd.

Could someone please help me to complete my new project?
Any suggestions will be a great help to me(about power system, boot system, etc.)

Thank you!
Last edited by song on Fri Mar 22, 2019 1:29 am, edited 1 time in total.



tobias
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Location: Sweden

Re: Power system of Crazyflie 2.0

Post by tobias » Wed Feb 13, 2019 12:32 pm

Very hard to tell what could be the problem. If you power it from VUSB instead what is the behavior? What voltage value are you referring to, the one in the cfclient?

song
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Posts: 15
Joined: Tue Jan 29, 2019 12:24 am

Re: Power system of Crazyflie 2.0

Post by song » Thu Feb 14, 2019 6:57 am

First, i'm afraid of saying that i don't understand the exact meaning of 'behavior' you said. I tried to power it from +BATT.
and voltage value i said is from ''DC Power Supply" equipment. I don't use cfclient, i use only eclipse and Terminal Emulator menu from your VM.

tobias
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Posts: 1911
Joined: Mon Jan 28, 2013 7:17 pm
Location: Sweden

Re: Power system of Crazyflie 2.0

Post by tobias » Thu Feb 14, 2019 10:23 am

So then something is probably short circuit and the current limit kicks in and that is why the voltage is dropping.

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