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Questions tagged [pi-b+]

This tag is specifically for the enhanced Pi model B+ that has 4 USB 2.0 ports and a 40-pin GPIO header compared to the earlier model B which only had two and a 26-pin header, and always has 512MBytes of memory. It has a single core Broadcom BCM-2385 processor in which it differs from the quad-core unit of the Pi 2 Model B. It has, like other B devices, the 10/100 BaseT Ethernet connectivity which Model A devices lack.

17
votes
1answer
10k views

Do all GPIO pins have a internal pull-up/pull-down resistors?

So question is: Does all Raspberrys GPIO have a internal pull-up/pull-down resistor which can be enabled from program, in my case Java language with PiJ4? I have Raspberry Model B+.
8
votes
1answer
25k views

alsa-base conf file missing

I have a USB sound card for my pi b+ which I want to setup as my default sound device and all the tutorials for setting up involve editing the alsa-base.conf file in /etc/modeprobe.d, but I don't seem ...
6
votes
1answer
6k views

DS18B20 no longer working

I had two of these running fine, but now they've stopped. From reading I've done I think this has something to do with kernel updates and device tree. There seems to be about half a dozen options now ...
2
votes
4answers
836 views

Raspberry Pi will not boot after configuring it

I recently started to actually begin using my raspberry pi and first wanted to configure it using this guide. After completing all the steps I rebooted once more and then pulled the plug for the day....
4
votes
2answers
26k views

Is this idle temperature normal for the RPi 3?

I've just setup a raspberry pi 3 and found out that, on idle, the temperature is about 48 C (measured with vcgencmd measure_temp). On a raspberry pi B+ with the same enclosure and in the same ...
3
votes
2answers
638 views

Using an L293D chip (to control a motor) with a separate power supply

I've got an L293D Motor Driver chip powered by 4.5v via some batteries and am trying to send high signals via the GPIO library in Python to control a motor, however this does not seem to work. My code ...
1
vote
1answer
5k views

Internal Pull Down Resistor on an Output Pin?

I'm following this tutorial to use the RPi B+ as a parallel EEPROM programmer. In the Python code in the tutorial, it sets all of the output pins with pull down resistors GPIO.setup (10, GPIO.OUT, ...
1
vote
1answer
324 views

Overclocking - CPU Frequency Measurement Accuracy: vcgencmd vs cpuinfo_cur_freq

As a follow-up to this question: Raspberry Pi B+ Overclocking: Force Turbo not working I had trouble getting force turbo to work. I was using the command: sudo vcgencmd measure_clock arm to get the ...
1
vote
0answers
72 views

Official Touch Screen not working with Raspberry pi B+ [duplicate]

So far, I've tried: turning it off and on again sudo apt-get update sudo apt-get upgrade sudo rpi-update rebooting disconnecting and reconnecting and checking the wiring Still doesn't work. What ...
0
votes
1answer
2k views

Raspberry Pi B+ Overclocking: Force Turbo not working [Solved: Undervoltage Problem]

Good day, I am overclocking my raspberry pi. I have selected the turbo option from the raspi-config. I have found out however that the Pi was not running consistently at 1GHz. I have tried setting ...