Powering the Pi and pi peripherals? - Raspberry Pi Forums

-

hello,

i'm new forums , looking advice. i'm working on little project , have several things powered 5v , 2-3a power supplies. pi itself, screen, speaker, , led assembly. want have these contained in box 1 plug in. looking advice on best way that. looking @ usb charging hubs option, wasn't sure if there better solution.

in advance advice!

hi:

isn't advice, cuz there many variables. anyway, don't know you, have number of different wall wart style power supplies lying around. of them 5v, 12v, , 20v dc supplies. laptops require 20 v supply. in past have managed plug wrong wart pi, frying it.

so, projects, automatically include dc-dc converter in box. available pretty small (maybe same size pi, or little bigger) - , don't require changing bigger enclosure. come in different power capacities, , different voltage adjustments , monitoring means (some fixed voltage). 1 that's powerful enough cover pretty number of peripherals might later add box, or plug it. make sure has solid voltage stability no matter voltage plugged it, limit (around 30v mine).

so, can use *any* of wall warts, long they're of sufficient power rating, , have dc voltage between 7v , approx 30v, , have converter's 5 volt output pi. don't have supplies on 20v, there's margin (probably idea). don't have worry plugging wrong thing box (read tears).

i'm no power supply expert, between idea, , brightly colored fingernail polish (different color dab onto ends of each different voltage plug) - haven't burned more pis.

internally, use plugs , short cables, , run them converter. when it's convenient, solder directly boards.


raspberrypi



Comments

Post a Comment

Popular posts from this blog

Error: ‘for’ loop initial declarations are only allowed in C99 or C11 mode - Raspberry Pi Forums

-
hey everyone, i'm trying compile simple code on rpi3 using geany. code written using code::blocks on windows , working without problem. errors i'm getting are: untitled.c:33:5: error: ‘for’ loop initial declarations allowed in c99 or c11 mode , untitled.c:33:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 compile code understand code not problem way i'm compiling it. can give me advice? you need add 1 of suggested options compile command configured in geany, in menu.. build -> set build commands add "-std=c99" after "gcc" in compile , build boxes. (i'm looking on mint pc expect version on pi same). petero raspberrypi
Read more

class MPU6050 has no member named begin

-
hi all, as working out scripts wich me make winddirection meter gy-87 calibrate compass sensor on board. i using script "hmc5883l_calibrate_mpu6050" korneliusz jarzebski. i fault "class mpu6050 has no member named begin" /*   calibrate hmc5883l + mpu6050 (gy-86 / gy-87). output hmc5883l_calibrate_processing.pde   read more: http://www.jarzebski.pl/arduino/czujniki-i-sensory/3-osiowy-magnetometr-hmc5883l.html   git: https://github.com/jarzebski/arduino-hmc5883l   web: http://www.jarzebski.pl   (c) 2014 korneliusz jarzebski */ #include <wire.h> #include <hmc5883l.h> #include <mpu6050.h> hmc5883l compass; mpu6050 mpu; int minx = 0; int maxx = 0; int miny = 0; int maxy = 0; int offx = 0; int offy = 0; void setup() {   serial.begin(9600);   // initialize mpu6050   while(!mpu.begin(mpu6050_scale_2000dps, mpu6050_range_2g))   {     delay(500);   } how slove error? any apreciated. kind regards, ilioss what compiler complainin
Read more

missing filename after '-o'

-
i'm new writing in arduino , trying program "ultimate robot kit blue". in uploading first motor test, error message keeps coming says: avr-g++: error: missing filename after '-o' exit status 1 error compiling. invalid library found in /users/dennisleary/documents/arduino/libraries/makeblock-libraries-master: /users/dennisleary/documents/arduino/libraries/makeblock-libraries-master invalid library found in /users/dennisleary/documents/arduino/libraries/makeblock-libraries-master: /users/dennisleary/documents/arduino/libraries/makeblock-libraries-master i've been trying robot , running quite time , appreciated! you have not installed library correctly or correct name.  however, did not post code , did not post complete message guessing.  not @ guessing.  please try again, following instructions follow. to post code and/or error messages: 1) use ctrl-t in arduino ide autoformat code. 2) paste autoformatted code between code tags (th
Read more