[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Paparazzi-devel] Lisa/M CheatSheet

From: Simon Goodwin
Subject: Re: [Paparazzi-devel] Lisa/M CheatSheet
Date: Sat, 23 Jul 2011 15:39:13 +0200
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20110501 Lightning/1.0b3pre Thunderbird/3.1.10


my toughts on voltage an current.

- V_Bat max. originats from keeping V_BAT_MEAS under 3V3
I calculated that to be 19V8.
- limits of 5V regulator
The shematics on the wiki state the 5V regulator to be a LP2992.
This garantees operation for Imax=250 mA, 5V5 < V_IN rail < 16V and 0 < 5V rail < 9V.

Open questions:
- max. USB power is given by min. of USB-Specs and the USB-VCC diode
What are the limits of the diode? What diode is used?
- limits of 3V3 regulator
What regulator was used here? What are the limits?

Input is welcome.

Simon Goodwin

Am 22.07.2011 09:11, schrieb Christophe De Wagter:
Great work!

About possible additions:

-I was wondering which I2C (SDA/SCL) were 3.3V and which 5V and in
general which pins (GPIO) are 5V tolerant.
-The max input is 19V but I can imagine it gets pretty hot when you hang
your gps, xbee, etc to the board (300mA x 12V = 4Watt). Isn't there a
power dissipation limit (also considering the temperature sensitive IMU
-How much is the current rating for the USB-to-Vcc Diode? When
developping it is great to only have to plug in usb to power the board
but I don't want to burn the 0402 diode (100mA 300ma?)


2011/7/17 Simon Goodwin <address@hidden <mailto:address@hidden>>

    Dear Paparazzians,

    find attached "Lisa/M CheatSheet" which I compiled while getting
    warm with this nice little board.

    I would like to ask you to fill in the voids or correct errors so I
    can finish it off and make it available.

    Where would be the place to put something like this?
    The Lisa/M page on the Wiki?
    The doc dir in the repo?
    The downloads page on the wiki?
    Maybe create a new Page for CheatSheets?


    Paparazzi-devel mailing list
    address@hidden <mailto:address@hidden>

Paparazzi-devel mailing list

reply via email to

[Prev in Thread] Current Thread [Next in Thread]