Raspberry Pi Forums

Knightlorish

I'm looking to buy a desoldering station for through-board components on older PCBs (e.g. ZX Spectrum). The main job will be to remove non-socketed ICs without damaging either the board or the component. I've used desoldering pumps and braid for many years with sometimes limited success (particularl...

Knightlorish

plugwash: that's just brilliant and you don't even have the board in front of you. I did think that the upper socket had been cut for a reason but didn't spot the offset and I'll blame it on being tired. I'd assumed that the plug was directly beneath the CPU socket and it's not. You're correct. See ...

Knightlorish

drgeoff thanks for your suggestion; it's an elegant solution.

All: thanks for taking the time and for your help.

Knightlorish

Apologies for the image quality, I stumbled over the 64k upload limit. The imgur tip is very helpful and appreciated. plugwash - thanks; that sounds within my abilities. The images, above and below the PCB are http://imgur.com/68TvSu0 and http://imgur.com/DVs0sQf The board is a RAM expansion board t...

Knightlorish

I have an Aries B32 RAM expansion board for the Beeb. Ah, nostalgia. From the two attached pictures showing front and back, I'm hoping that someone can help. A few of the pins on the back are broken at the bottom where the extended socket plugs into the main board's CPU socket. Without manhandling i...

Knightlorish

I'm late to the party on this one but oh dear. I bought two displays soon after release but didn't get around to using them until recently and don't I feel stupid now. I was a little alarmed at how bright the display was since the projects I'd planned would be used in all light conditions. Up to dat...

Knightlorish

I'll quickly answer my own question in case it helps anyone else. There was a bug and it's fixed by 'sudo rpi-update', with the caveats, for a firmware update. I had a camera in a binocular eyepiece and definitely needed the LED off. See https://www.raspberrypi.org/forums/viewtopic.php?p=922799#p922...

Knightlorish

I've found with Jessie that disable_camera_led=1 in config.txt disables the camera: cue some frustration dismantling camera from Pi in carefully placed Pi.

Is there a simple way to disable the camera LED using the current Jessie?

Knightlorish

I've been having a similar problem and it's frustrating having spent a long time in the comfort of Pi 1s and astonishingly robust reliability. Perhaps I was remarkably lucky on my choice of SanDisk 16GB class 10 SD cards (SanDisk Ultra 30 MB/s) for several Pi 1s. For the Pi 2s, I've imaged several n...

Knightlorish

Before running the backup, create a blank text file named whateveryouwant .img in the location that you wish to create the SD card backup. The .img extension is important. Now when you run Win32 Disk Imager, browse to the newly-created blank .img file and then click READ. The failed to check error ...

Knightlorish

I couldn't get Win32 Disk Imager to "see" my internal SD card reader (possibly due to both its vintage and inability to read a large SDHC). I solved it by buying an external USB3 SDHC card reader (Betron) and I've not had a problem with Win32 Disk Imager since then.

Knightlorish

Thanks for this post and for including the solution. I was looking for a means of graphing data without resorting to php, queries and curly brackets and this steered me towards gnuplot. Running a bash/gnuplot script via Crontab and transferring the graphic output to /var/www means that I am finally ...

Knightlorish

Say the program with the RPi.GPIO import is called "blah.py". If you execute it with "python blah.py" then it will generate the import error,

import RPi.GPIO as GPIO
ImportError: No module named RPi.GPIO

If you execute it with "sudo python.blah" then it won't.

Knightlorish

Thanks to both of you for prompt and helpful responses. The fact that the output states are "remembered" between executions surprised me and I thought I might just be going mad or had maimed a Pi but I'm now wiser and the risk of a runaway motor has been averted.

Knightlorish

Hello all, I've attached some simple Python below to illustrate something that I don't understand in respect of GPIO output. The code lights one LED, extinguishes it, lights another LED, extinguishes it and starts over. If I CTRL-C, or say if there were an error in the code, then the try statement e...

Knightlorish

This works very nicely with a pc browser but since it's Flash video, it doesn't work with an iPad. I'm trying to get my head around the ffmpeg syntax to see whether it's simple enough to change the output stream to html5 or something else. Has anyone had any success with this?

Knightlorish

Is image detection possible using the Pi camera board? Using a general egg shape of the smallest expected size for a match and searching a monochrome image of the nest box (to disregard colour)? Assuming that the egg isn't completely covered in straw, that is. My hens tend to form a nest shape in th...

Knightlorish

I wondered about this too and looked to Adafruit for a recommendation. They suggested the Extech EX330. I sourced it in the UK and so far, so good. It's simple, multi-featured, a good size, auto-ranging and quite robust.

Knightlorish

I've acquired some electric windows motors and the torque, speed, voltage and current requirements are ideal for several projects that I have in mind. The engineering of the motors into the projects has now become the challenge of the day. I've attached a photo of the motor for illustration and woul...

Knightlorish

I'd like to buy a bench power supply for the multitude of projects that the Pi is causing to appear in my head. It's mainly to properly test circuits, both analogue and digital, to determine that they are safe before they get anywhere near the GPIO pins or the Arduino. What do the wise recommend? I'...

Knightlorish

The PiFace is useful for the two relays to see how it all works but it needs some soldering to break out the GPIO pins to enable a 1-wire temperature sensor such as the DS18B20; it's only replacing the Pi header with longer pins and PiFace said that they'd be releasing a stackable version at some po...

Knightlorish

Thanks very much for taking the time to reply. The window motor seems like a great idea and it's very capable too. Can you suggest a suitable motor controller since I'm still embarassingly new to this. Would it be best to buy an Arduino motor controller and step-up from 3V3 to 5V logic? Is using opt...

Knightlorish

The first Pi project for me appears simple but I'm stumbling at the basic level and hope someone can give me a hint. I'm planning to open and close a blind that has a rotating input shaft that is currently rotated by a removable crank handle. The blind is 30 feet long; to give some idea of scale, an...

Search found 23 matches

Desoldering station/gun recommendations

Re: PCB question

Re: PCB question

Re: PCB question

PCB question

Re: v1.1 controller board

Re: Turning off camera LED

Re: Turning off camera LED

Re: Raspberry Pi 2 defective?

Re: Cloning SD Card

Re: Cloning SD Card

Re: Strange Time Issue - Gnuplot [Solved]

Re: Import Error

Re: GPIO output state after CTRL-C

GPIO output state after CTRL-C

Re: Streaming Raspberry Pi Camera H264 into HTML over RTMP

Re: Chicken Egg Detector

Re: Voltmeter Recommendations

Attaching sprockets and the like to motors

Bench power supply

Re: Raspberry Pi to toggle 3-way valve

Re: Specifying the correct motor

Specifying the correct motor