John Deere RE219053 javítás 

Szembekerültem egy ilyen monitorral aminek az egyik gombja bedöglött.
A gombok fóliamátrix kialakításúak, ezért az egyik legtöbbet használt gomb bemondta az unalmast, folyamatosan kontaktot adott.

Kapott hát egy szép kis bohócorrot a helyére:



Szépen bedrótoztam a helyére:



Gomb csati lábkiosztása:


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Ebay review: 614 Micro Motor DC 3.7V 

I have came across many similar small motors on ebay:


By looking at their dimensions I couldn't resist to buy a few one to try out how they perform in my Furibee F36.

Here are the plain results running from 4.2V bench supply:
No load current: 60 mA
Consumed current while driving the Furibee's 32mm ducted fan: 570 mA

As seen from the currents above (Furibee's motors consuming ~1A with FAN) these motors are not as powerful as the Furibee's.

The thing can fly, but not as agile as with the original motors.
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UDEV rule for setting the baudrate and bringing up socketcan interfaces 


SUBSYSTEM=="net", ACTION=="add", KERNEL=="can*", RUN+="/etc/udev/rules.d/setup_can_interfaces.sh"


And the setup_can_interfaces.sh:


#!/bin/bash

/sbin/ip link set $INTERFACE type can bitrate 1000000
/sbin/ifconfig $INTERFACE txqueuelen 1000
/sbin/ifconfig $INTERFACE up



Do not forget to add executable rights and then reload the udev rules:
udevadm control --reload-rules && udevadm trigger

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Howto run an application on SailfishOS with root permissions 

Normally you will not need it unless you are debugging something permission sensitive stuff.

- Activate developer mode, set ssh password
- SSH to your phone
- devel-su
- export XDG_RUNTIME_DIR=/run/user/100000
- xdg-open /usr/share/applications/ble_scanner.desktop
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nRF51822 development logs 

I have purchased a similar board from ebay to play with:

https://raw.githubusercontent.com/wiki/RIOT-OS/RIOT/images/yunjia-nrf51822-full.jpg popup=true]


The Nordic's PCA10028 devboard has almost the same MCU as mine, but it has double amount of RAM. To compile the examples for this board the linker script needs to be modified:


/* Linker script to configure memory regions. */

SEARCH_DIR(.)
GROUP(-lgcc -lc -lnosys)

MEMORY
{
FLASH (rx) : ORIGIN = 0x0, LENGTH = 0x40000
RAM (rwx) : ORIGIN = 0x20000000, LENGTH = 0x4000
}

SECTIONS
{
.fs_data :
{
PROVIDE(__start_fs_data = .);
KEEP(*(.fs_data))
PROVIDE(__stop_fs_data = .);
} > RAM
} INSERT AFTER .data;

INCLUDE "nrf5x_common.ld"

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